Monday, May 13, 2013

LM185-1.2/LM285-1.2/LM385-1.2 Micropower Voltage Reference Diode

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.

■ ±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


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