1

®

ISO124

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 16-PIN PLASTIC DIP AND 28-LEAD SOIC

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, 4mA to 20mA Loop Isolation

q GROUND LOOP ELIMINATION

q MOTOR AND SCR CONTROL

q POWER MONITORING

q PC-BASED DATA ACQUISITION

q TEST EQUIPMENT

ISO124

DESCRIPTION

The ISO124 is a precision isolation amplifier incor-

porating a novel duty cycle modulation-demodulation

technique. The signal is transmitted digitally across

a 2pF differential capacitive barrier. With digital modu-

lation 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 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 V

±4.5V to ±18V and quiescent currents of ±5.0mA on

for a wide range of applications.

The ISO124 is available in 16-pin plastic DIP and 28-

lead plastic surface mount packages.

®

Precision Lowest Cost

ISOLATION AMPLIFIER

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

PDS-1405A

Printed in U.S.A. September, 1997

+V

S1

V

IN

V

OUT

–V

S1

+V

S2

Gnd

–V

S2

Gnd

ISO124

ISO124