Burr-Brown, Texas Instruments ISO122 pdf datasheet download

ISO122

 Precision Lowest Cost
ISOLATION AMPLIFIER

FEATURES

l 100% TESTED FOR HIGH-VOLTAGE
BREAKDOWN
l RATED 1500Vrms
l HIGH IMR: 140dB at 60Hz
l BIPOLAR OPERATION: VO = ±10V
l 16-PIN PLASTIC DIP AND 28-LEAD SOIC
l EASE OF USE: Fixed Unity Gain
Configuration
l 0.020% max NONLINEARITY
l ±4.5V to ±18V SUPPLY RANGE

APPLICATIONS

l INDUSTRIAL PROCESS CONTROL:
Transducer Isolator, Isolator for Thermocouples,
RTDs, Pressure Bridges, and
Flow Meters, 4mA to 20mA Loop Isolation
l GROUND LOOP ELIMINATION
l MOTOR AND SCR CONTROL
l POWER MONITORING
l PC-BASED DATA ACQUISITION
l TEST EQUIPMENT

DESCRIPTION

The ISO122 is a precision isolation amplifier incorporating
a novel duty cycle modulation-demodulation
technique. The signal is transmitted digitally across
a 2pF differential capacitive barrier. With digital modulation
the barrier characteristics do not affect signal
integrity, resulting in excellent reliability and good high
frequency transient immunity across the barrier. Both
barrier capacitors are imbedded in the plastic body of
the package.
The ISO122 is easy to use. No external components
are required for operation. The key specifications are
0.020% max nonlinearity, 50kHz signal bandwidth,
and 200mV/°C VOS drift. A power supply range of
±4.5V to ±18V and quiescent currents of ±5.0mA on
VS1 and ±5.5mA on VS2 make these amplifiers ideal
for a wide range of applications.
The ISO122 is available in 16-pin plastic DIP and 28-
lead plastic surface mount packages.


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