Read/Write
Base Station
U2270B
Features
• Carrier Frequency fosc 100 kHz to 150 kHz
• Typical Data Rate up to 5 Kbaud at 125 kHz
• Suitable for Manchester and Bi-phase Modulation
• Power Supply from the Car Battery or from 5V Regulated Voltage
• Optimized for Car Immobilizer Applications
• Tuning Capability
• Microcontroller-compatible Interface
• Low Power Consumption in Standby Mode
• Power-supply Output for Microcontroller
Applications
• Car Immobilizers
• Animal Identification
• Access Control
• Process Control
1. Description
The U2270B is an IC for IDIC® read/write base stations in contactless identification
and immobilizer systems.
The IC incorporates the energy-transfer circuit to supply the transponder. It consists of
an on-chip power supply, an oscillator, and a coil driver optimized for automotive-specific
distances. It also includes all signal-processing circuits which are necessary to
transform the small input signal into a microcontroller-compatible signal.
Click here to download ATMEL pdf datasheets Read/Write Base Station U2270B
TopDatasheet-IC chip circuits ATMEL Quantum pdf datasheets download
Showing posts with label National Semiconductor. Show all posts
Showing posts with label National Semiconductor. Show all posts
Tuesday, May 14, 2013
DS1489/DS1489A Quad Line Receiver download National Semiconductor pdf datasheets
DS1489/DS1489A
Quad Line Receiver
General Description
The DS1489/DS1489A are quad line receivers designed to
interface data terminal equipment with data communications
equipment. They are constructed on a single monolithic
silicon chip. These devices satisfy the specifications of EIA
Standard RS-232D. The DS1489/DS1489A meet and exceed
the specifications of MC1489/MC1489A and are
pin-for-pin replacements.
Features
n Four separate receivers per package
n Programmable threshold
n Built-in input threshold hysteresis
n “Fail safe” operating mode: high output for open inputs
n Inputs withstand ±30V
Click here to download National Semiconductor pdf datasheets DS1489/DS1489A Quad Line Receiver
Datasheets Download-National Semiconductor pdf datasheets download
Quad Line Receiver
General Description
The DS1489/DS1489A are quad line receivers designed to
interface data terminal equipment with data communications
equipment. They are constructed on a single monolithic
silicon chip. These devices satisfy the specifications of EIA
Standard RS-232D. The DS1489/DS1489A meet and exceed
the specifications of MC1489/MC1489A and are
pin-for-pin replacements.
Features
n Four separate receivers per package
n Programmable threshold
n Built-in input threshold hysteresis
n “Fail safe” operating mode: high output for open inputs
n Inputs withstand ±30V
Click here to download National Semiconductor pdf datasheets DS1489/DS1489A Quad Line Receiver
Datasheets Download-National Semiconductor pdf datasheets download
DS26C31T/DS26C31M CMOS Quad TRI-STATE® Differential Line Driver
DS26C31T/DS26C31M
CMOS Quad TRI-STATE® Differential Line Driver
General Description
The DS26C31 is a quad differential line driver designed for
digital data transmission over balanced lines. The
DS26C31T meets all the requirements of EIA standard RS-
422 while retaining the low power characteristics of CMOS.
The DS26C31M is compatible with EIA standard RS-422;
however, one exception in test methodology is taken (Note
8). This enables the construction of serial and terminal interfaces
while maintaining minimal power consumption.
The DS26C31 accepts TTL or CMOS input levels and translates
these to RS-422 output levels. This part uses special
output circuitry that enables the drivers to power down without
loading down the bus. This device has enable and disable
circuitry common to all four drivers. The DS26C31 is pin
compatible to the AM26LS31 and the DS26LS31.
All inputs are protected against damage due to electrostatic
discharge by diodes to VCC and ground.
Features
n TTL input compatible
n Typical propagation delays: 6 ns
n Typical output skew: 0.5 ns
n Outputs will not load line when VCC = 0V
n DS26C31T meets the requirements of EIA standard
RS-422
n Operation from single 5V supply
n TRI-STATE outputs for connection to system buses
n Low quiescent current
n Available in surface mount
n Mil-Std-883C compliant
Click here to download National Semiconductor pdf datasheets DS26C31T/DS26C31M CMOS Quad TRI-STATE® Differential Line Driver
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CMOS Quad TRI-STATE® Differential Line Driver
General Description
The DS26C31 is a quad differential line driver designed for
digital data transmission over balanced lines. The
DS26C31T meets all the requirements of EIA standard RS-
422 while retaining the low power characteristics of CMOS.
The DS26C31M is compatible with EIA standard RS-422;
however, one exception in test methodology is taken (Note
8). This enables the construction of serial and terminal interfaces
while maintaining minimal power consumption.
The DS26C31 accepts TTL or CMOS input levels and translates
these to RS-422 output levels. This part uses special
output circuitry that enables the drivers to power down without
loading down the bus. This device has enable and disable
circuitry common to all four drivers. The DS26C31 is pin
compatible to the AM26LS31 and the DS26LS31.
All inputs are protected against damage due to electrostatic
discharge by diodes to VCC and ground.
Features
n TTL input compatible
n Typical propagation delays: 6 ns
n Typical output skew: 0.5 ns
n Outputs will not load line when VCC = 0V
n DS26C31T meets the requirements of EIA standard
RS-422
n Operation from single 5V supply
n TRI-STATE outputs for connection to system buses
n Low quiescent current
n Available in surface mount
n Mil-Std-883C compliant
Click here to download National Semiconductor pdf datasheets DS26C31T/DS26C31M CMOS Quad TRI-STATE® Differential Line Driver
Datasheets Download-National Semiconductor pdf datasheets download
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit μP Compatible A/D Converters download National Semiconductor pdf datasheets
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805
8-Bit μP Compatible A/D Converters
General Description
The ADC0801, ADC0802, ADC0803, ADC0804 and
ADC0805 are CMOS 8-bit successive approximation A/D
converters that use a differential potentiometric
ladder—similar to the 256R products. These converters are
designed to allow operation with the NSC800 and INS8080A
derivative control bus with TRI-STATE output latches directly
driving the data bus. These A/Ds appear like memory locations
or I/O ports to the microprocessor and no interfacing
logic is needed.
Differential analog voltage inputs allow increasing the
common-mode rejection and offsetting the analog zero input
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
Features
n Compatible with 8080 μP derivatives—no interfacing
logic needed - access time - 135 ns
n Easy interface to all microprocessors, or operates “stand
alone”
n Differential analog voltage inputs
n Logic inputs and outputs meet both MOS and TTL
voltage level specifications
n Works with 2.5V (LM336) voltage reference
n On-chip clock generator
n 0V to 5V analog input voltage range with single 5V
supply
n No zero adjust required
n 0.3" standard width 20-pin DIP package
n 20-pin molded chip carrier or small outline package
n Operates ratiometrically or with 5 VDC, 2.5 VDC, or
analog span adjusted voltage reference
Key Specifications
n Resolution 8 bits
n Total error ±1⁄4 LSB, ±1⁄2 LSB and ±1 LSB
n Conversion time 100 μs
Click here to download National Semiconductor pdf datasheets ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit μP Compatible A/D Converters
Datasheets Download-National Semiconductor pdf datasheets download
8-Bit μP Compatible A/D Converters
General Description
The ADC0801, ADC0802, ADC0803, ADC0804 and
ADC0805 are CMOS 8-bit successive approximation A/D
converters that use a differential potentiometric
ladder—similar to the 256R products. These converters are
designed to allow operation with the NSC800 and INS8080A
derivative control bus with TRI-STATE output latches directly
driving the data bus. These A/Ds appear like memory locations
or I/O ports to the microprocessor and no interfacing
logic is needed.
Differential analog voltage inputs allow increasing the
common-mode rejection and offsetting the analog zero input
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
Features
n Compatible with 8080 μP derivatives—no interfacing
logic needed - access time - 135 ns
n Easy interface to all microprocessors, or operates “stand
alone”
n Differential analog voltage inputs
n Logic inputs and outputs meet both MOS and TTL
voltage level specifications
n Works with 2.5V (LM336) voltage reference
n On-chip clock generator
n 0V to 5V analog input voltage range with single 5V
supply
n No zero adjust required
n 0.3" standard width 20-pin DIP package
n 20-pin molded chip carrier or small outline package
n Operates ratiometrically or with 5 VDC, 2.5 VDC, or
analog span adjusted voltage reference
Key Specifications
n Resolution 8 bits
n Total error ±1⁄4 LSB, ±1⁄2 LSB and ±1 LSB
n Conversion time 100 μs
Click here to download National Semiconductor pdf datasheets ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit μP Compatible A/D Converters
Datasheets Download-National Semiconductor pdf datasheets download
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit μP Compatible A/D Converters
ADC0801/ADC0802/ADC0803/ADC0804/ADC0805
8-Bit μP Compatible A/D Converters
General Description
The ADC0801, ADC0802, ADC0803, ADC0804 and
ADC0805 are CMOS 8-bit successive approximation A/D
converters that use a differential potentiometric
ladder—similar to the 256R products. These converters are
designed to allow operation with the NSC800 and INS8080A
derivative control bus with TRI-STATE output latches directly
driving the data bus. These A/Ds appear like memory locations
or I/O ports to the microprocessor and no interfacing
logic is needed.
Differential analog voltage inputs allow increasing the
common-mode rejection and offsetting the analog zero input
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
Features
n Compatible with 8080 μP derivatives—no interfacing
logic needed - access time - 135 ns
n Easy interface to all microprocessors, or operates “stand
alone”
n Differential analog voltage inputs
n Logic inputs and outputs meet both MOS and TTL
voltage level specifications
n Works with 2.5V (LM336) voltage reference
n On-chip clock generator
n 0V to 5V analog input voltage range with single 5V
supply
n No zero adjust required
n 0.3" standard width 20-pin DIP package
n 20-pin molded chip carrier or small outline package
n Operates ratiometrically or with 5 VDC, 2.5 VDC, or
analog span adjusted voltage reference
Key Specifications
n Resolution 8 bits
n Total error ±1⁄4 LSB, ±1⁄2 LSB and ±1 LSB
n Conversion time 100 μs
Click here to download National Semiconductor pdf datasheets ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit μP Compatible A/D Converters
Datasheets Download-National Semiconductor pdf datasheets download
8-Bit μP Compatible A/D Converters
General Description
The ADC0801, ADC0802, ADC0803, ADC0804 and
ADC0805 are CMOS 8-bit successive approximation A/D
converters that use a differential potentiometric
ladder—similar to the 256R products. These converters are
designed to allow operation with the NSC800 and INS8080A
derivative control bus with TRI-STATE output latches directly
driving the data bus. These A/Ds appear like memory locations
or I/O ports to the microprocessor and no interfacing
logic is needed.
Differential analog voltage inputs allow increasing the
common-mode rejection and offsetting the analog zero input
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
Features
n Compatible with 8080 μP derivatives—no interfacing
logic needed - access time - 135 ns
n Easy interface to all microprocessors, or operates “stand
alone”
n Differential analog voltage inputs
n Logic inputs and outputs meet both MOS and TTL
voltage level specifications
n Works with 2.5V (LM336) voltage reference
n On-chip clock generator
n 0V to 5V analog input voltage range with single 5V
supply
n No zero adjust required
n 0.3" standard width 20-pin DIP package
n 20-pin molded chip carrier or small outline package
n Operates ratiometrically or with 5 VDC, 2.5 VDC, or
analog span adjusted voltage reference
Key Specifications
n Resolution 8 bits
n Total error ±1⁄4 LSB, ±1⁄2 LSB and ±1 LSB
n Conversion time 100 μs
Click here to download National Semiconductor pdf datasheets ADC0801/ADC0802/ADC0803/ADC0804/ADC0805 8-Bit μP Compatible A/D Converters
Datasheets Download-National Semiconductor pdf datasheets download
Monday, May 13, 2013
LM118/LM218/LM318 Operational Amplifiers download National Semiconductor pdf datasheets
LM118/LM218/LM318
Operational Amplifiers
General Description
The LM118 series are precision high speed operational amplifiers
designed for applications requiring wide bandwidth
and high slew rate. They feature a factor of ten increase in
speed over general purpose devices without sacrificing DC
performance.
The LM118 series has internal unity gain frequency compensation.
This considerably simplifies its application since no
external components are necessary for operation. However,
unlike most internally compensated amplifiers, external frequency
compensation may be added for optimum performance.
For inverting applications, feedforward compensation
will boost the slew rate to over 150V/μs and almost
double the bandwidth. Overcompensation can be used with
the amplifier for greater stability when maximum bandwidth
is not needed. Further, a single capacitor can be added to
reduce the 0.1% settling time to under 1 μs.
The high speed and fast settling time of these op amps make
them useful in A/D converters, oscillators, active filters,
Click here to download National Semiconductor pdf datasheets LM118/LM218/LM318 Operational Amplifiers
Datasheets Download-National Semiconductor pdf datasheets download
Operational Amplifiers
General Description
The LM118 series are precision high speed operational amplifiers
designed for applications requiring wide bandwidth
and high slew rate. They feature a factor of ten increase in
speed over general purpose devices without sacrificing DC
performance.
The LM118 series has internal unity gain frequency compensation.
This considerably simplifies its application since no
external components are necessary for operation. However,
unlike most internally compensated amplifiers, external frequency
compensation may be added for optimum performance.
For inverting applications, feedforward compensation
will boost the slew rate to over 150V/μs and almost
double the bandwidth. Overcompensation can be used with
the amplifier for greater stability when maximum bandwidth
is not needed. Further, a single capacitor can be added to
reduce the 0.1% settling time to under 1 μs.
The high speed and fast settling time of these op amps make
them useful in A/D converters, oscillators, active filters,
Click here to download National Semiconductor pdf datasheets LM118/LM218/LM318 Operational Amplifiers
Datasheets Download-National Semiconductor pdf datasheets download
LM1876 Overture™ Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes
LM1876 Overture™ Audio Power Amplifier Series
Dual 20W Audio Power Amplifier with Mute and Standby
Modes
General Description
The LM1876 is a stereo audio amplifier capable of delivering
typically 20W per channel of continuous average output
power into a 4Ω or 8Ω load with less than 0.1% THD+N.
Each amplifier has an independent smooth transition fadein/
out mute and a power conserving standby mode which
can be controlled by external logic.
The performance of the LM1876, utilizing its Self Peak Instantaneous
Temperature (°Ke) (SPiKe™) protection circuitry,
places it in a class above discrete and hybrid amplifiers
by providing an inherently, dynamically protected Safe
Operating Area (SOA). SPiKe protection means that these
parts are safeguarded at the output against overvoltage,
undervoltage, overloads, including thermal runaway and instantaneous
temperature peaks.
Key Specifications
jTHD+N at 1kHz at 2 x 15W continuous average
output power into 4Ω or 8Ω: 0.1% (max)
jTHD+N at 1kHz at continuous average
output power of 2 x 20W into 8Ω: 0.009% (typ)
jStandby current: 4.2mA (typ)
Features
n SPiKe protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute mode
n Standby-mode
n Isolated 15-lead TO-220 package
n Non-Isolated 15-lead TO-220 package
n Wide supply range 20V - 64V
Applications
n High-end stereo TVs
n Component stereo
n Compact stereo
Click here to download National Semiconductor pdf datasheets LM1876 Overture™ Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes
Datasheets Download-National Semiconductor pdf datasheets download
Dual 20W Audio Power Amplifier with Mute and Standby
Modes
General Description
The LM1876 is a stereo audio amplifier capable of delivering
typically 20W per channel of continuous average output
power into a 4Ω or 8Ω load with less than 0.1% THD+N.
Each amplifier has an independent smooth transition fadein/
out mute and a power conserving standby mode which
can be controlled by external logic.
The performance of the LM1876, utilizing its Self Peak Instantaneous
Temperature (°Ke) (SPiKe™) protection circuitry,
places it in a class above discrete and hybrid amplifiers
by providing an inherently, dynamically protected Safe
Operating Area (SOA). SPiKe protection means that these
parts are safeguarded at the output against overvoltage,
undervoltage, overloads, including thermal runaway and instantaneous
temperature peaks.
Key Specifications
jTHD+N at 1kHz at 2 x 15W continuous average
output power into 4Ω or 8Ω: 0.1% (max)
jTHD+N at 1kHz at continuous average
output power of 2 x 20W into 8Ω: 0.009% (typ)
jStandby current: 4.2mA (typ)
Features
n SPiKe protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute mode
n Standby-mode
n Isolated 15-lead TO-220 package
n Non-Isolated 15-lead TO-220 package
n Wide supply range 20V - 64V
Applications
n High-end stereo TVs
n Component stereo
n Compact stereo
Click here to download National Semiconductor pdf datasheets LM1876 Overture™ Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes
Datasheets Download-National Semiconductor pdf datasheets download
LM146/LM346 Programmable Quad Operational Amplifiers National Semiconductor pdf datasheets download
LM146/LM346
Programmable Quad Operational Amplifiers
General Description
The LM146 series of quad op amps consists of four independent,
high gain, internally compensated, low power, programmable
amplifiers. Two external resistors (RSET) allow
the user to program the gain bandwidth product, slew rate,
supply current, input bias current, input offset current and
input noise. For example, the user can trade-off supply
current for bandwidth or optimize noise figure for a given
source resistance. In a similar way, other amplifier characteristics
can be tailored to the application. Except for the two
programming pins at the end of the package, the LM146
pin-out is the same as the LM124 and LM148.
Features
(ISET=10 μA)
n Programmable electrical characteristics
n Battery-powered operation
n Low supply current: 350 μA/amplifier
n Guaranteed gain bandwidth product: 0.8 MHz min
n Large DC voltage gain: 120 dB
n Low noise voltage: 28
n Wide power supply range: ±1.5V to ±22V
n Class AB output stage–no crossover distortion
n Ideal pin out for Biquad active filters
n Input bias currents are temperature compensated
Click here to download National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download LM146/LM346 Programmable Quad Operational Amplifiers
Programmable Quad Operational Amplifiers
General Description
The LM146 series of quad op amps consists of four independent,
high gain, internally compensated, low power, programmable
amplifiers. Two external resistors (RSET) allow
the user to program the gain bandwidth product, slew rate,
supply current, input bias current, input offset current and
input noise. For example, the user can trade-off supply
current for bandwidth or optimize noise figure for a given
source resistance. In a similar way, other amplifier characteristics
can be tailored to the application. Except for the two
programming pins at the end of the package, the LM146
pin-out is the same as the LM124 and LM148.
Features
(ISET=10 μA)
n Programmable electrical characteristics
n Battery-powered operation
n Low supply current: 350 μA/amplifier
n Guaranteed gain bandwidth product: 0.8 MHz min
n Large DC voltage gain: 120 dB
n Low noise voltage: 28
n Wide power supply range: ±1.5V to ±22V
n Class AB output stage–no crossover distortion
n Ideal pin out for Biquad active filters
n Input bias currents are temperature compensated
Click here to download National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download LM146/LM346 Programmable Quad Operational Amplifiers
LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode
LM185-1.2/LM285-1.2/LM385-1.2
Micropower Voltage Reference Diode
General Description
The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal
band-gap voltage regulator diodes. Operating over a
10μA to 20mA current range, they feature exceptionally low
dynamic impedance and good temperature stability. On-chip
trimming is used to provide tight voltage tolerance. Since the
LM185-1.2 band-gap reference uses only transistors and resistors,
low noise and good long term stability result.
Careful design of the LM185-1.2 has made the device exceptionally
tolerant of capacitive loading, making it easy to use in
almost any reference application. The wide dynamic operating
range allows its use with widely varying supplies with
excellent regulation.
The extremely low power drain of the LM185-1.2 makes it
useful for micropower circuitry. This voltage reference can be
used to make portable meters, regulators or general purpose
analog circuitry with battery life approaching shelf life.
Further, the wide operating current allows it to replace older
references with a tighter tolerance part.
The LM185-1.2 is rated for operation over a −55°C to 125°C
temperature range while the LM285-1.2 is rated −40°C to 85°
C and the LM385-1.2 0°C to 70°C. The LM185-1.2/LM285-1.2
are available in a hermetic TO-46 package and the
LM285-1.2/LM385-1.2 are also available in a low-cost TO-92
molded package, as well as SO and SOT-23. The LM185-1.2
is also available in a hermetic leadless chip carrier package.
Features
■ ±1% and 2% initial tolerance
■ Operating current of 10μA to 20mA
■ 1Ω dynamic impedance
■ Low temperature coefficient
■ Low voltage reference—1.235V
■ 2.5V device and adjustable device also available
■ LM185-2.5 series and LM185 series, respectively
Click here to download National Semiconductor pdf datasheets LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode
Datasheets Download-National Semiconductor pdf datasheets
Micropower Voltage Reference Diode
General Description
The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal
band-gap voltage regulator diodes. Operating over a
10μA to 20mA current range, they feature exceptionally low
dynamic impedance and good temperature stability. On-chip
trimming is used to provide tight voltage tolerance. Since the
LM185-1.2 band-gap reference uses only transistors and resistors,
low noise and good long term stability result.
Careful design of the LM185-1.2 has made the device exceptionally
tolerant of capacitive loading, making it easy to use in
almost any reference application. The wide dynamic operating
range allows its use with widely varying supplies with
excellent regulation.
The extremely low power drain of the LM185-1.2 makes it
useful for micropower circuitry. This voltage reference can be
used to make portable meters, regulators or general purpose
analog circuitry with battery life approaching shelf life.
Further, the wide operating current allows it to replace older
references with a tighter tolerance part.
The LM185-1.2 is rated for operation over a −55°C to 125°C
temperature range while the LM285-1.2 is rated −40°C to 85°
C and the LM385-1.2 0°C to 70°C. The LM185-1.2/LM285-1.2
are available in a hermetic TO-46 package and the
LM285-1.2/LM385-1.2 are also available in a low-cost TO-92
molded package, as well as SO and SOT-23. The LM185-1.2
is also available in a hermetic leadless chip carrier package.
Features
■ ±1% and 2% initial tolerance
■ Operating current of 10μA to 20mA
■ 1Ω dynamic impedance
■ Low temperature coefficient
■ Low voltage reference—1.235V
■ 2.5V device and adjustable device also available
■ LM185-2.5 series and LM185 series, respectively
Click here to download National Semiconductor pdf datasheets LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode
Datasheets Download-National Semiconductor pdf datasheets
LF198/LF298/LF398, LF198A/LF398A Monolithic Sample-and-Hold Circuits
LF198/LF298/LF398, LF198A/LF398A
Monolithic Sample-and-Hold Circuits
General Description
The LF198/LF298/LF398 are monolithic sample-and-hold
circuits which utilize BI-FET technology to obtain ultra-high
dc accuracy with fast acquisition of signal and low droop
rate. Operating as a unity gain follower, dc gain accuracy is
0.002% typical and acquisition time is as low as 6 μs to
0.01%. A bipolar input stage is used to achieve low offset
voltage and wide bandwidth. Input offset adjust is accomplished
with a single pin, and does not degrade input offset
drift. The wide bandwidth allows the LF198 to be included inside
the feedback loop of 1 MHz op amps without having stability
problems. Input impedance of 1010W allows high
source impedances to be used without degrading accuracy.
P-channel junction FET’s are combined with bipolar devices
in the output amplifier to give droop rates as low as 5 mV/min
with a 1 μF hold capacitor. The JFET’s have much lower
noise than MOS devices used in previous designs and do
not exhibit high temperature instabilities. The overall design
guarantees no feed-through from input to output in the hold
mode, even for input signals equal to the supply voltages.
Features
n Operates from ±5V to ±18V supplies
n Less than 10 μs acquisition time
n TTL, PMOS, CMOS compatible logic input
n 0.5 mV typical hold step at Ch = 0.01 μF
n Low input offset
n 0.002% gain accuracy
n Low output noise in hold mode
n Input characteristics do not change during hold mode
n High supply rejection ratio in sample or hold
n Wide bandwidth
n Space qualified, JM38510
Logic inputs on the LF198 are fully differential with low input
current, allowing direct connection to TTL, PMOS, and
CMOS. Differential threshold is 1.4V. The LF198 will operate
from ±5V to ±18V supplies.
An “A” version is available with tightened electrical
specifications.
Click here to download National Semiconductor pdf datasheets LF198/LF298/LF398, LF198A/LF398A Monolithic Sample-and-Hold Circuits
Datasheets Download-National Semiconductor pdf datasheets download
Monolithic Sample-and-Hold Circuits
General Description
The LF198/LF298/LF398 are monolithic sample-and-hold
circuits which utilize BI-FET technology to obtain ultra-high
dc accuracy with fast acquisition of signal and low droop
rate. Operating as a unity gain follower, dc gain accuracy is
0.002% typical and acquisition time is as low as 6 μs to
0.01%. A bipolar input stage is used to achieve low offset
voltage and wide bandwidth. Input offset adjust is accomplished
with a single pin, and does not degrade input offset
drift. The wide bandwidth allows the LF198 to be included inside
the feedback loop of 1 MHz op amps without having stability
problems. Input impedance of 1010W allows high
source impedances to be used without degrading accuracy.
P-channel junction FET’s are combined with bipolar devices
in the output amplifier to give droop rates as low as 5 mV/min
with a 1 μF hold capacitor. The JFET’s have much lower
noise than MOS devices used in previous designs and do
not exhibit high temperature instabilities. The overall design
guarantees no feed-through from input to output in the hold
mode, even for input signals equal to the supply voltages.
Features
n Operates from ±5V to ±18V supplies
n Less than 10 μs acquisition time
n TTL, PMOS, CMOS compatible logic input
n 0.5 mV typical hold step at Ch = 0.01 μF
n Low input offset
n 0.002% gain accuracy
n Low output noise in hold mode
n Input characteristics do not change during hold mode
n High supply rejection ratio in sample or hold
n Wide bandwidth
n Space qualified, JM38510
Logic inputs on the LF198 are fully differential with low input
current, allowing direct connection to TTL, PMOS, and
CMOS. Differential threshold is 1.4V. The LF198 will operate
from ±5V to ±18V supplies.
An “A” version is available with tightened electrical
specifications.
Click here to download National Semiconductor pdf datasheets LF198/LF298/LF398, LF198A/LF398A Monolithic Sample-and-Hold Circuits
Datasheets Download-National Semiconductor pdf datasheets download
LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs
LM3404/04HV
1.0A Constant Current Buck Regulator for Driving High
Power LEDs
General Description
The LM3404/04HV are monolithic switching regulators designed
to deliver constant currents to high power LEDs. Ideal
for automotive, industrial, and general lighting applications,
they contain a high-side N-channel MOSFET switch with a
current limit of 1.5A (typical) for step-down (Buck) regulators.
Hysteretic controlled on-time and an external resistor allow
the converter output voltage to adjust as needed to deliver a
constant current to series and series-parallel connected LED
arrays of varying number and type. LED dimming via pulse
width modulation (PWM), broken/open LED protection, lowpower
shutdown and thermal shutdown complete the feature
set.
Features
■ Integrated 1.0A MOSFET
■ VIN Range 6V to 42V (LM3404)
■ VIN Range 6V to 75V (LM3404HV)
■ 1.2A Output Current Over Temperature
■ Cycle-by-Cycle Current Limit
■ No Control Loop Compensation Required
■ Separate PWM Dimming and Low Power Shutdown
■ Supports all-ceramic output capacitors and capacitor-less
outputs
■ Thermal shutdown protection
■ SO-8 Package, PSOP-8 Package
Applications
■ LED Driver
■ Constant Current Source
■ Automotive Lighting
■ General Illumination
■ Industrial Lighting
Click here to download National Semiconductor pdf datasheets LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs
Datasheets Download-National Semiconductor pdf datasheets download
1.0A Constant Current Buck Regulator for Driving High
Power LEDs
General Description
The LM3404/04HV are monolithic switching regulators designed
to deliver constant currents to high power LEDs. Ideal
for automotive, industrial, and general lighting applications,
they contain a high-side N-channel MOSFET switch with a
current limit of 1.5A (typical) for step-down (Buck) regulators.
Hysteretic controlled on-time and an external resistor allow
the converter output voltage to adjust as needed to deliver a
constant current to series and series-parallel connected LED
arrays of varying number and type. LED dimming via pulse
width modulation (PWM), broken/open LED protection, lowpower
shutdown and thermal shutdown complete the feature
set.
Features
■ Integrated 1.0A MOSFET
■ VIN Range 6V to 42V (LM3404)
■ VIN Range 6V to 75V (LM3404HV)
■ 1.2A Output Current Over Temperature
■ Cycle-by-Cycle Current Limit
■ No Control Loop Compensation Required
■ Separate PWM Dimming and Low Power Shutdown
■ Supports all-ceramic output capacitors and capacitor-less
outputs
■ Thermal shutdown protection
■ SO-8 Package, PSOP-8 Package
Applications
■ LED Driver
■ Constant Current Source
■ Automotive Lighting
■ General Illumination
■ Industrial Lighting
Click here to download National Semiconductor pdf datasheets LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs
Datasheets Download-National Semiconductor pdf datasheets download
LM6165/LM6265/LM6365 High Speed Operational Amplifier download National Semiconductor pdf datasheets
LM6165/LM6265/LM6365
High Speed Operational Amplifier
General Description
The LM6165 family of high-speed amplifiers exhibits an excellent
speed-power product in delivering 300 V/μs and
725 MHz GBW (stable for gains as low as +25) with only
5 mA of supply current. Further power savings and application
convenience are possible by taking advantage of the
wide dynamic range in operating supply voltage which extends
all the way down to +5V.
These amplifiers are built with National’s VIP™ (Vertically Integrated
PNP) process which produces fast PNP transistors
that are true complements to the already fast NPN devices.
This advanced junction-isolated process delivers high speed
performance without the need for complex and expensive dielectric
isolation.
Features
n High slew rate: 300 V/μs
n High GBW product: 725 MHz
n Low supply current: 5 mA
n Fast settling: 80 ns to 0.1%
n Low differential gain: <0.1%
n Low differential phase: <0.1°
n Wide supply range: 4.75V to 32V
n Stable with unlimited capacitive load
Applications
n Video amplifier
n Wide-bandwidth signal conditioning
n Radar
n Sonar
Click here to download National Semiconductor pdf datasheets LM6165/LM6265/LM6365 High Speed Operational Amplifier
Datasheets Download-National Semiconductor pdf datasheets download
High Speed Operational Amplifier
General Description
The LM6165 family of high-speed amplifiers exhibits an excellent
speed-power product in delivering 300 V/μs and
725 MHz GBW (stable for gains as low as +25) with only
5 mA of supply current. Further power savings and application
convenience are possible by taking advantage of the
wide dynamic range in operating supply voltage which extends
all the way down to +5V.
These amplifiers are built with National’s VIP™ (Vertically Integrated
PNP) process which produces fast PNP transistors
that are true complements to the already fast NPN devices.
This advanced junction-isolated process delivers high speed
performance without the need for complex and expensive dielectric
isolation.
Features
n High slew rate: 300 V/μs
n High GBW product: 725 MHz
n Low supply current: 5 mA
n Fast settling: 80 ns to 0.1%
n Low differential gain: <0.1%
n Low differential phase: <0.1°
n Wide supply range: 4.75V to 32V
n Stable with unlimited capacitive load
Applications
n Video amplifier
n Wide-bandwidth signal conditioning
n Radar
n Sonar
Click here to download National Semiconductor pdf datasheets LM6165/LM6265/LM6365 High Speed Operational Amplifier
Datasheets Download-National Semiconductor pdf datasheets download
Sunday, May 12, 2013
LMV331 Single / LMV393 Dual / LMV339 Quad General Purpose, Low Voltage, Tiny Pack Comparators
LMV331 Single / LMV393 Dual / LMV339 Quad
General Purpose, Low Voltage, Tiny Pack Comparators
General Description
The LMV393 and LMV339 are low voltage (2.7-5V) versions
of the dual and quad comparators, LM393/339, which are
specified at 5-30V. The LMV331 is the single version, which
is available in space saving 5-pin SC70 and 5-pin SOT23
packages. The 5-pin SC70 is approximately half the size of
the 5-pin SOT23.
The LMV393 is available in 8-pin SOIC and MSOP. The
LMV339 is available in 14-pin SOIC and TSSOP.
The LMV331/393/339 is the most cost-effective solution
where space, low voltage, low power and price are the primary
specification in circuit design for portable consumer
products. They offer specifications that meet or exceed the
familiar LM393/339 at a fraction of the supply current.
The chips are built with National's advanced Submicron Silicon-
Gate BiCMOS process. The LMV331/393/339 have bipolar
input and output stages for improved noise performance.
Features
(For 5V supply, typical unless otherwise noted)
■ Guaranteed 2.7V and 5V performance
■ Industrial temperature range −40°C to +85°C
■ Low supply current 60 μA/Channel
■ Input common mode voltage range includes ground
■ Low output saturation voltage 200 mV
■ Propagation delay 200 ns
■ Space saving 5-pin SC70 and 5-Pin SOT23 packages
Applications
■ Mobile communications
■ Notebooks and PDA's
■ Battery powered electronics
■ General purpose portable device
■ General purpose low voltage applications
Click here to download National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download
General Purpose, Low Voltage, Tiny Pack Comparators
General Description
The LMV393 and LMV339 are low voltage (2.7-5V) versions
of the dual and quad comparators, LM393/339, which are
specified at 5-30V. The LMV331 is the single version, which
is available in space saving 5-pin SC70 and 5-pin SOT23
packages. The 5-pin SC70 is approximately half the size of
the 5-pin SOT23.
The LMV393 is available in 8-pin SOIC and MSOP. The
LMV339 is available in 14-pin SOIC and TSSOP.
The LMV331/393/339 is the most cost-effective solution
where space, low voltage, low power and price are the primary
specification in circuit design for portable consumer
products. They offer specifications that meet or exceed the
familiar LM393/339 at a fraction of the supply current.
The chips are built with National's advanced Submicron Silicon-
Gate BiCMOS process. The LMV331/393/339 have bipolar
input and output stages for improved noise performance.
Features
(For 5V supply, typical unless otherwise noted)
■ Guaranteed 2.7V and 5V performance
■ Industrial temperature range −40°C to +85°C
■ Low supply current 60 μA/Channel
■ Input common mode voltage range includes ground
■ Low output saturation voltage 200 mV
■ Propagation delay 200 ns
■ Space saving 5-pin SC70 and 5-Pin SOT23 packages
Applications
■ Mobile communications
■ Notebooks and PDA's
■ Battery powered electronics
■ General purpose portable device
■ General purpose low voltage applications
Click here to download National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download
download National Semiconductor pdf datasheets LM3421, LM3423 N-Channel Controllers for Constant Current LED Drivers
LM3421, LM3423
N-Channel Controllers for Constant Current LED Drivers
General Description
The LM3421/LM3423 devices are versatile high voltage LED
driver controllers. With the capability to be configured in a
Buck, Boost, Buck-Boost (Flyback), or SEPIC topology, and
an input operating voltage rating of 75V, these controllers are
ideal for illuminating LEDs in a very diverse, large family of
applications.
Adjustable high-side current sense with a typical sense voltage
of 100mV allows for tight regulation of the LED current
with the highest efficiency possible. Output LED current regulation
is based on peak current-mode control with predictive
Off-Time Control. This method of control eases the design of
loop compensation while providing inherent input voltage
feed-forward compensation.
The LM3421/LM3423 include a high-voltage startup regulator
that operates over a wide input range of 4.5V to 75V. The
internal PWM controller is designed for adjustable switching
frequencies of up to 2.0MHz, thus enabling compact solutions.
Additional features include: “zero” current shutdown,
precision reference, logic compatible DIM input suitable for
fast PWM dimming, cycle-by-cycle current limit, and thermal
shutdown.
The LM3423 also includes an LED output status flag, a fault
flag, a programmable fault timer, and a logic input to select
the polarity of the dimming output driver.
Click here to download National Semiconductor pdf datasheets LM3421, LM3423 N-Channel Controllers for Constant Current LED Drivers
Datasheets Download-National Semiconductor pdf datasheets download
N-Channel Controllers for Constant Current LED Drivers
General Description
The LM3421/LM3423 devices are versatile high voltage LED
driver controllers. With the capability to be configured in a
Buck, Boost, Buck-Boost (Flyback), or SEPIC topology, and
an input operating voltage rating of 75V, these controllers are
ideal for illuminating LEDs in a very diverse, large family of
applications.
Adjustable high-side current sense with a typical sense voltage
of 100mV allows for tight regulation of the LED current
with the highest efficiency possible. Output LED current regulation
is based on peak current-mode control with predictive
Off-Time Control. This method of control eases the design of
loop compensation while providing inherent input voltage
feed-forward compensation.
The LM3421/LM3423 include a high-voltage startup regulator
that operates over a wide input range of 4.5V to 75V. The
internal PWM controller is designed for adjustable switching
frequencies of up to 2.0MHz, thus enabling compact solutions.
Additional features include: “zero” current shutdown,
precision reference, logic compatible DIM input suitable for
fast PWM dimming, cycle-by-cycle current limit, and thermal
shutdown.
The LM3423 also includes an LED output status flag, a fault
flag, a programmable fault timer, and a logic input to select
the polarity of the dimming output driver.
Click here to download National Semiconductor pdf datasheets LM3421, LM3423 N-Channel Controllers for Constant Current LED Drivers
Datasheets Download-National Semiconductor pdf datasheets download
LM139/LM239/LM339/LM2901/LM3302 download LM313 National Semiconductor pdf datasheets
LM139/LM239/LM339/LM2901/LM3302
Low Power Low Offset Voltage Quad Comparators
General Description
The LM139 series consists of four independent precision
voltage comparators with an offset voltage specification as
low as 2 mV max for all four comparators. These were
designed specifically to operate from a single power supply
over a wide range of voltages. Operation from split power
supplies is also possible and the low power supply current
drain is independent of the magnitude of the power supply
voltage. These comparators also have a unique characteristic
in that the input common-mode voltage range includes
ground, even though operated from a single power supply
voltage.
Application areas include limit comparators, simple analog to
digital converters; pulse, squarewave and time delay generators;
wide range VCO; MOS clock timers; multivibrators
and high voltage digital logic gates. The LM139 series was
designed to directly interface with TTL and CMOS. When
operated from both plus and minus power supplies, they will
directly interface with MOS logic— where the low power
drain of the LM339 is a distinct advantage over standard
comparators.
Features
n Wide supply voltage range
n LM139/139A Series 2 to 36 VDC or ±1 to ±18 VDC
n LM2901: 2 to 36 VDC or ±1 to ±18 VDC
n LM3302: 2 to 28 VDC or ±1 to ±14 VDC
n Very low supply current drain (0.8 mA) — independent
of supply voltage
n Low input biasing current: 25 nA
n Low input offset current: ±5 nA
n Offset voltage: ±3 mV
n Input common-mode voltage range includes GND
n Differential input voltage range equal to the power
supply voltage
n Low output saturation voltage: 250 mV at 4 mA
n Output voltage compatible with TTL, DTL, ECL, MOS
and CMOS logic systems
Advantages
n High precision comparators
n Reduced VOS drift over temperature
n Eliminates need for dual supplies
n Allows sensing near GND
n Compatible with all forms of logic
n Power drain suitable for battery operation
Click here to download LM313 National Semiconductor pdf datasheets LM139/LM239/LM339/LM2901/LM3302
Datasheets Download-National Semiconductor pdf datasheets download
Low Power Low Offset Voltage Quad Comparators
General Description
The LM139 series consists of four independent precision
voltage comparators with an offset voltage specification as
low as 2 mV max for all four comparators. These were
designed specifically to operate from a single power supply
over a wide range of voltages. Operation from split power
supplies is also possible and the low power supply current
drain is independent of the magnitude of the power supply
voltage. These comparators also have a unique characteristic
in that the input common-mode voltage range includes
ground, even though operated from a single power supply
voltage.
Application areas include limit comparators, simple analog to
digital converters; pulse, squarewave and time delay generators;
wide range VCO; MOS clock timers; multivibrators
and high voltage digital logic gates. The LM139 series was
designed to directly interface with TTL and CMOS. When
operated from both plus and minus power supplies, they will
directly interface with MOS logic— where the low power
drain of the LM339 is a distinct advantage over standard
comparators.
Features
n Wide supply voltage range
n LM139/139A Series 2 to 36 VDC or ±1 to ±18 VDC
n LM2901: 2 to 36 VDC or ±1 to ±18 VDC
n LM3302: 2 to 28 VDC or ±1 to ±14 VDC
n Very low supply current drain (0.8 mA) — independent
of supply voltage
n Low input biasing current: 25 nA
n Low input offset current: ±5 nA
n Offset voltage: ±3 mV
n Input common-mode voltage range includes GND
n Differential input voltage range equal to the power
supply voltage
n Low output saturation voltage: 250 mV at 4 mA
n Output voltage compatible with TTL, DTL, ECL, MOS
and CMOS logic systems
Advantages
n High precision comparators
n Reduced VOS drift over temperature
n Eliminates need for dual supplies
n Allows sensing near GND
n Compatible with all forms of logic
n Power drain suitable for battery operation
Click here to download LM313 National Semiconductor pdf datasheets LM139/LM239/LM339/LM2901/LM3302
Datasheets Download-National Semiconductor pdf datasheets download
LM135/LM235/LM335, LM135A/LM235A/LM335A Precision Temperature Sensors
LM135/LM235/LM335, LM135A/LM235A/LM335A
Precision Temperature Sensors
General Description
The LM135 series are precision, easily-calibrated, integrated
circuit temperature sensors. Operating as a 2-terminal zener,
the LM135 has a breakdown voltage directly proportional to
absolute temperature at +10 mV/°K. With less than 1W dynamic
impedance the device operates over a current range
of 400 μA to 5 mA with virtually no change in performance.
When calibrated at 25°C the LM135 has typically less than
1°C error over a 100°C temperature range. Unlike other
sensors the LM135 has a linear output.
Applications for the LM135 include almost any type of temperature
sensing over a −55°C to +150°C temperature
range. The low impedance and linear output make interfacing
to readout or control circuitry especially easy.
The LM135 operates over a −55°C to +150°C temperature
range while the LM235 operates over a −40°C to +125°C
temperature range. The LM335 operates from −40°C to
+100°C. The LM135/LM235/LM335 are available packaged
in hermetic TO-46 transistor packages while the LM335 is
also available in plastic TO-92 packages.
Features
n Directly calibrated in °Kelvin
n 1°C initial accuracy available
n Operates from 400 μA to 5 mA
n Less than 1W dynamic impedance
n Easily calibrated
n Wide operating temperature range
n 200°C overrange
n Low cost
Click here to download LM313 National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download
Precision Temperature Sensors
General Description
The LM135 series are precision, easily-calibrated, integrated
circuit temperature sensors. Operating as a 2-terminal zener,
the LM135 has a breakdown voltage directly proportional to
absolute temperature at +10 mV/°K. With less than 1W dynamic
impedance the device operates over a current range
of 400 μA to 5 mA with virtually no change in performance.
When calibrated at 25°C the LM135 has typically less than
1°C error over a 100°C temperature range. Unlike other
sensors the LM135 has a linear output.
Applications for the LM135 include almost any type of temperature
sensing over a −55°C to +150°C temperature
range. The low impedance and linear output make interfacing
to readout or control circuitry especially easy.
The LM135 operates over a −55°C to +150°C temperature
range while the LM235 operates over a −40°C to +125°C
temperature range. The LM335 operates from −40°C to
+100°C. The LM135/LM235/LM335 are available packaged
in hermetic TO-46 transistor packages while the LM335 is
also available in plastic TO-92 packages.
Features
n Directly calibrated in °Kelvin
n 1°C initial accuracy available
n Operates from 400 μA to 5 mA
n Less than 1W dynamic impedance
n Easily calibrated
n Wide operating temperature range
n 200°C overrange
n Low cost
Click here to download LM313 National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download
LM113/LM313 Reference Diode download National Semiconductor pdf datasheets
LM113/LM313 Reference Diode
General Description
The LM113/LM313 are temperature compensated, low voltage
reference diodes. They feature extremely-tight regulation
over a wide range of operating currents in addition to an
unusually-low breakdown voltage and good temperature
stability.
The diodes are synthesized using transistors and resistors
in a monolithic integrated circuit. As such, they have the
same low noise and long term stability as modern IC op
amps. Further, output voltage of the reference depends only
on highly-predictable properties of components in the IC; so
they can be manufactured and supplied to tight tolerances.
Features
Y Low breakdown voltage: 1.220V
Click here to download LM313 National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download
General Description
The LM113/LM313 are temperature compensated, low voltage
reference diodes. They feature extremely-tight regulation
over a wide range of operating currents in addition to an
unusually-low breakdown voltage and good temperature
stability.
The diodes are synthesized using transistors and resistors
in a monolithic integrated circuit. As such, they have the
same low noise and long term stability as modern IC op
amps. Further, output voltage of the reference depends only
on highly-predictable properties of components in the IC; so
they can be manufactured and supplied to tight tolerances.
Features
Y Low breakdown voltage: 1.220V
Click here to download LM313 National Semiconductor pdf datasheets
Datasheets Download-National Semiconductor pdf datasheets download
Friday, October 5, 2012
DAC0830,DAC0832 National Semiconductor pdf datasheet download
DAC0830,DAC0832
8-Bit μP Compatible, Double-Buffered D to A Converters
General Description
The DAC0830 is an advanced CMOS/Si-Cr 8-bit multiplying
DAC designed to interface directly with the 8080, 8048,
8085, Z80®, and other popular microprocessors. A deposited
silicon-chromium R-2R resistor ladder network divides the
reference current and provides the circuit with excellent
temperature tracking characteristics (0.05% of Full Scale
Range maximum linearity error over temperature). The circuit
uses CMOS current switches and control logic to
achieve low power consumption and low output leakage
current errors. Special circuitry provides TTL logic input voltage
level compatibility.
Double buffering allows these DACs to output a voltage
corresponding to one digital word while holding the next
digital word. This permits the simultaneous updating of any
number of DACs.
The DAC0830 series are the 8-bit members of a family of
microprocessor-compatible DACs (MICRO-DAC™).
Features
n Double-buffered, single-buffered or flow-through digital
data inputs
n Easy interchange and pin-compatible with 12-bit
DAC1230 series
n Direct interface to all popular microprocessors
n Linearity specified with zero and full scale adjust
only—NOT BEST STRAIGHT LINE FIT.
n Works with ±10V reference-full 4-quadrant multiplication
n Can be used in the voltage switching mode
n Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
n Operates “STAND ALONE” (without μP) if desired
n Available in 20-pin small-outline or molded chip carrier
package
Key Specifications
n Current settling time: 1 μs
n Resolution: 8 bits
n Linearity: 8, 9, or 10 bits (guaranteed over temp.)
n Gain Tempco: 0.0002% FS/°C
n Low power dissipation: 20 mW
n Single power supply: 5 to 15 VDC
Click here to download DAC0830,DAC0832 National Semiconductor pdf datasheet
DatasheetDoc-National Semiconductor pdf datasheet download
8-Bit μP Compatible, Double-Buffered D to A Converters
General Description
The DAC0830 is an advanced CMOS/Si-Cr 8-bit multiplying
DAC designed to interface directly with the 8080, 8048,
8085, Z80®, and other popular microprocessors. A deposited
silicon-chromium R-2R resistor ladder network divides the
reference current and provides the circuit with excellent
temperature tracking characteristics (0.05% of Full Scale
Range maximum linearity error over temperature). The circuit
uses CMOS current switches and control logic to
achieve low power consumption and low output leakage
current errors. Special circuitry provides TTL logic input voltage
level compatibility.
Double buffering allows these DACs to output a voltage
corresponding to one digital word while holding the next
digital word. This permits the simultaneous updating of any
number of DACs.
The DAC0830 series are the 8-bit members of a family of
microprocessor-compatible DACs (MICRO-DAC™).
Features
n Double-buffered, single-buffered or flow-through digital
data inputs
n Easy interchange and pin-compatible with 12-bit
DAC1230 series
n Direct interface to all popular microprocessors
n Linearity specified with zero and full scale adjust
only—NOT BEST STRAIGHT LINE FIT.
n Works with ±10V reference-full 4-quadrant multiplication
n Can be used in the voltage switching mode
n Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
n Operates “STAND ALONE” (without μP) if desired
n Available in 20-pin small-outline or molded chip carrier
package
Key Specifications
n Current settling time: 1 μs
n Resolution: 8 bits
n Linearity: 8, 9, or 10 bits (guaranteed over temp.)
n Gain Tempco: 0.0002% FS/°C
n Low power dissipation: 20 mW
n Single power supply: 5 to 15 VDC
Click here to download DAC0830,DAC0832 National Semiconductor pdf datasheet
DatasheetDoc-National Semiconductor pdf datasheet download
Thursday, September 13, 2012
LM76 National Semiconductor pdf datasheet download
LM76
LM76 +/-0.5C, +/-1C, 12-Bit + Sign Digital Temperature Sensor and Thermal
WindowComparator with Two-Wire Interface
±0.5°C, ±1°C, 12-Bit + Sign Digital Temperature Sensor and
Thermal Window Comparator with Two-Wire Interface
General Description
The LM76 is a digital temperature sensor and thermal window
comparator with an I2C™ Serial Bus interface with an accuracy
of ±1°C. This accuracy for the LM76CHM is specified for
a −10°C to 45°C temperature range. The LM76CHM is specified
with an accuracy ±0.5°C at 25°C. The window-comparator
architecture of the LM76 eases the design of temperature
control systems conforming to the ACPI (Advanced Configuration
and Power Interface) specification for personal computers.
The open-drain Interrupt (INT) output becomes active
whenever temperature goes outside a programmable window,
while a separate Critical Temperature Alarm
(T_CRIT_A) output becomes active when the temperature
exceeds a programmable critical limit. The INT output can
operate in either a comparator or event mode, while the
T_CRIT_A output operates in comparator mode only.
The host can program both the upper and lower limits of the
window as well as the critical temperature limit. Programmable
hysterisis as well as a fault queue are available
to minimize false tripping. Two pins (A0, A1) are available for
address selection. The sensor powers up with default thresholds
of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.
The LM76's 5.0V supply voltage, Serial Bus interface, 12-bit
+ sign output, and full-scale range of over 127°C make it ideal
for a wide range of applications. These include thermal management
and protection applications in personal computers,
electronic test equipment, office electronics and bio-medical
applications.
Features
■ Window comparison simplifies design of ACPI compatible
temperature monitoring and control.
■ Serial Bus interface
■ Separate open-drain outputs for Interrupt and Critical
Temperature shutdown
■ Shutdown mode to minimize power consumption
■ Up to 4 LM76s can be connected to a single bus
■ 12-bit + sign output; full-scale reading of over 127°C
Key Specifications
■ Supply Voltage 5.0V
■ Supply Current operating 250 μA (typ)
450 μA (max)
shutdown 8 μA (max)
■ Temperature
Accuracy
+25°C ±0.5°C(max)
−10°C to +45°C ±1.0°C(max)
70°C to 100°C ±1.0°C(max)
■ Resolution 0.0625°C
Applications
■ System Thermal Management
■ Personal Computers
■ Office Electronics
■ HVAC
Click here to download LM76 National Semiconductor pdf datasheet
DatasheetDoc-National Semiconductor pdf datasheet download
LM76 +/-0.5C, +/-1C, 12-Bit + Sign Digital Temperature Sensor and Thermal
WindowComparator with Two-Wire Interface
±0.5°C, ±1°C, 12-Bit + Sign Digital Temperature Sensor and
Thermal Window Comparator with Two-Wire Interface
General Description
The LM76 is a digital temperature sensor and thermal window
comparator with an I2C™ Serial Bus interface with an accuracy
of ±1°C. This accuracy for the LM76CHM is specified for
a −10°C to 45°C temperature range. The LM76CHM is specified
with an accuracy ±0.5°C at 25°C. The window-comparator
architecture of the LM76 eases the design of temperature
control systems conforming to the ACPI (Advanced Configuration
and Power Interface) specification for personal computers.
The open-drain Interrupt (INT) output becomes active
whenever temperature goes outside a programmable window,
while a separate Critical Temperature Alarm
(T_CRIT_A) output becomes active when the temperature
exceeds a programmable critical limit. The INT output can
operate in either a comparator or event mode, while the
T_CRIT_A output operates in comparator mode only.
The host can program both the upper and lower limits of the
window as well as the critical temperature limit. Programmable
hysterisis as well as a fault queue are available
to minimize false tripping. Two pins (A0, A1) are available for
address selection. The sensor powers up with default thresholds
of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.
The LM76's 5.0V supply voltage, Serial Bus interface, 12-bit
+ sign output, and full-scale range of over 127°C make it ideal
for a wide range of applications. These include thermal management
and protection applications in personal computers,
electronic test equipment, office electronics and bio-medical
applications.
Features
■ Window comparison simplifies design of ACPI compatible
temperature monitoring and control.
■ Serial Bus interface
■ Separate open-drain outputs for Interrupt and Critical
Temperature shutdown
■ Shutdown mode to minimize power consumption
■ Up to 4 LM76s can be connected to a single bus
■ 12-bit + sign output; full-scale reading of over 127°C
Key Specifications
■ Supply Voltage 5.0V
■ Supply Current operating 250 μA (typ)
450 μA (max)
shutdown 8 μA (max)
■ Temperature
Accuracy
+25°C ±0.5°C(max)
−10°C to +45°C ±1.0°C(max)
70°C to 100°C ±1.0°C(max)
■ Resolution 0.0625°C
Applications
■ System Thermal Management
■ Personal Computers
■ Office Electronics
■ HVAC
Click here to download LM76 National Semiconductor pdf datasheet
DatasheetDoc-National Semiconductor pdf datasheet download
Monday, August 6, 2012
Texas Instruments, National Semiconductor,LM1875 pdf datasheet download
LM1875 20W Audio Power Amplifier
General Description
The LM1875 is a monolithic power amplifier offering very low
distortion and high quality performance for consumer audio
applications.
The LM1875 delivers 20 watts into a 4Ω or 8Ω load on ±25V
supplies. Using an 8Ω load and ±30V supplies, over 30
watts of power may be delivered. The amplifier is designed
to operate with a minimum of external components. Device
overload protection consists of both internal current limit and
thermal shutdown.
The LM1875 design takes advantage of advanced circuit
techniques and processing to achieve extremely low distortion
levels even at high output power levels. Other outstanding
features include high gain, fast slew rate and a wide
power bandwidth, large output voltage swing, high current
capability, and a very wide supply range. The amplifier is
internally compensated and stable for gains of 10 or greater.
Features
n Up to 30 watts output power
n AVO typically 90 dB
n Low distortion: 0.015%, 1 kHz, 20 W
n Wide power bandwidth: 70 kHz
n Protection for AC and DC short circuits to ground
n Thermal protection with parole circuit
n High current capability: 4A
n Wide supply range 16V-60V
n Internal output protection diodes
n 94 dB ripple rejection
n Plastic power package TO-220
Applications
n High performance audio systems
n Bridge amplifiers
n Stereo phonographs
n Servo amplifiers
n Instrument systems
Click here to download Texas Instruments, National Semiconductor,LM1875 pdf datasheet
DatasheetDoc-All pdf datasheet download
General Description
The LM1875 is a monolithic power amplifier offering very low
distortion and high quality performance for consumer audio
applications.
The LM1875 delivers 20 watts into a 4Ω or 8Ω load on ±25V
supplies. Using an 8Ω load and ±30V supplies, over 30
watts of power may be delivered. The amplifier is designed
to operate with a minimum of external components. Device
overload protection consists of both internal current limit and
thermal shutdown.
The LM1875 design takes advantage of advanced circuit
techniques and processing to achieve extremely low distortion
levels even at high output power levels. Other outstanding
features include high gain, fast slew rate and a wide
power bandwidth, large output voltage swing, high current
capability, and a very wide supply range. The amplifier is
internally compensated and stable for gains of 10 or greater.
Features
n Up to 30 watts output power
n AVO typically 90 dB
n Low distortion: 0.015%, 1 kHz, 20 W
n Wide power bandwidth: 70 kHz
n Protection for AC and DC short circuits to ground
n Thermal protection with parole circuit
n High current capability: 4A
n Wide supply range 16V-60V
n Internal output protection diodes
n 94 dB ripple rejection
n Plastic power package TO-220
Applications
n High performance audio systems
n Bridge amplifiers
n Stereo phonographs
n Servo amplifiers
n Instrument systems
Click here to download Texas Instruments, National Semiconductor,LM1875 pdf datasheet
DatasheetDoc-All pdf datasheet download
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