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

q DIP-16 AND SO-28

q EASE OF USE: Fixed Unity Gain Configuration

q

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

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 200

µV/°C

quiescent currents of

±5.0mA on V

make these amplifiers ideal for a wide range of applications.

The ISO124 is available in DIP-16 and SO-28 plastic surface

mount packages.

Precision Lowest-Cost

ISOLATION AMPLIFIER

+V

S1

V

IN

V

OUT

–V

S1

+V

S2

Gnd 2

–V

S2

Gnd 1

ISO1

24

ISO124

ISO124

SBOS074C – SEPTEMBER 1997 – REVISED SEPTEMBER 2005

www.ti.com

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.

Copyright © 1997-2005, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.