© 1989 Burr-Brown Corporation

PDS-844E

Printed in U.S.A. August, 1999

ISO113

Low-Cost, High-Voltage, Internally Powered

OUTPUT ISOLATION AMPLIFIER

FEATURES

q SELF-CONTAINED ISOLATED SIGNAL

AND OUTPUT POWER

q SMALL PACKAGE SIZE: Double-Wide

(0.6") Sidebraze DIP

q CONTINUOUS AC BARRIER RATING:

1500Vrms

q WIDE BANDWIDTH: 20kHz Small Signal,

20kHz Full Power

q BUILT-IN ISOLATED OUTPUT POWER:

q MULTICHANNEL SYNCHRONIZATION

CAPABILITY

APPLICATIONS

q 4mA TO 20mA V/I CONVERTERS

q MOTOR AND VALVE CONTROLLERS

q ISOLATED RECORDER OUTPUTS

q MEDICAL INSTRUMENTATION OUTPUTS

q GAS ANALYZERS

DESCRIPTION

The ISO113 output isolation amplifier provides both

signal and output power across an isolation barrier in

a small double-wide DIP package. The ceramic non-

hermetic hybrid package with side-brazed pins con-

tains a transformer-coupled DC/ DC converter and a

capacitor-coupled signal channel.

Extra power is available on the isolated output side for

driving external loads. The converter is protected from

shorts to ground with an internal current limit, and the

soft-start feature limits the initial currents from the

power source. Multiple-channel synchronization can

be accomplished by applying a TTL clock signal to

paralleled Sync pins. The Enable control is used to

turn off transformer drive while keeping the signal

channel modulator active. This feature provides a

convenient way to reduce quiescent current for low

power applications.

The wide barrier pin spacing and internal insulation

allow for the generous 1500Vrms continuous rating.

Reliability is assured by 100% barrier breakdown

testing that conforms to UL1244 test methods. Low

barrier capacitance minimizes AC leakage currents.

These specifications and built-in features make the

ISO113 easy to use, and provides for compact PC

board layout.

Duty Cycle Modulator

Duty Cycle Demodulator

Rectifiers, Filters

Oscillators, Driver

V

OUT

–V

CC2

Sync*

Enable

+V

CC1

Ps Gnd

+V

CC2

–V

CC1

Gnd 1

Com 1

V

IN

Sense

–V

C

Sync

*Ground if not used

Gnd 2

®

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Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

ISO113