ISO124U-1K Datasheet, PDF (1/19 Pages) Texas Instruments – Precision Lowest-Cost

ISO124
ISO124
ISO124
SBOS074C – SEPTEMBER 1997 – REVISED SEPTEMBER 2005
Precision Lowest-Cost
ISOLATION AMPLIFIER
FEATURES
q 100% TESTED FOR HIGH-VOLTAGE
BREAKDOWN
q RATED 1500Vrms
q HIGH IMR: 140dB at 60Hz
q 0.010% max NONLINEARITY
q BIPOLAR OPERATION: V_O = ±10V
q DIP-16 AND SO-28
q EASE OF USE: Fixed Unity Gain Configuration
q ±4.5V to ±18V SUPPLY RANGE
DESCRIPTION
The ISO124 is a precision isolation amplifier incorporating a
novel duty cycle modulation-demodulation technique. The
signal is transmitted digitally across a 2pF differential capaci-
tive barrier. With digital modulation, the barrier characteris-
tics do not affect signal integrity, resulting in excellent reliabil-
ity and good high-frequency transient immunity across the
barrier. Both barrier capacitors are imbedded in the plastic
body of the package.
The ISO124 is easy to use. No external components are
required for operation. The key specifications are 0.010%
max nonlinearity, 50kHz signal bandwidth, and 200µV/°C
V_OS drift. A power supply range of ±4.5V to ±18V and
quiescent currents of ±5.0mA on V_S1 and ±5.5mA on V_S2
make these amplifiers ideal for a wide range of applications.
The ISO124 is available in DIP-16 and SO-28 plastic surface
mount packages.
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL:
Transducer Isolator, Isolator for Thermo-
couples, RTDs, Pressure Bridges, and
Flow Meters, 4-20mA Loop Isolation
q GROUND LOOP ELIMINATION
q MOTOR AND SCR CONTROL
q POWER MONITORING
q PC-BASED DATA ACQUISITION
q TEST EQUIPMENT
V_IN
V_OUT
–V_S2
Gnd 2
+V_S2
–V_S1
Gnd 1
+V_S1
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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