ISO103 Datasheet, PDF (1/9 Pages) Burr-Brown (TI) – Low-Cost, Internally Powered ISOLATION AMPLIFIER

®
ISO103
ISO103
Low-Cost, Internally Powered
ISOLATION AMPLIFIER
FEATURES
q SIGNAL AND POWER IN ONE
DOUBLE-WIDE (0.6") SIDE-BRAZED
PACKAGE
q 5600Vpk TEST VOLTAGE
q 1500Vrms CONTINUOUS AC BARRIER
RATING
q WIDE INPUT SIGNAL RANGE:
–10V to +10V
q WIDE BANDWIDTH:
20kHz Small Signal, 20kHz Full Power
q BUILT-IN ISOLATED POWER:
±10V to ±18V Input, ±50mA Output
q MULTICHANNEL SYNCHRONIZATION
CAPABILITY (TTL)
q BOARD AREA ONLY 0.72in.² (4.6cm²)
DESCRIPTION
The ISO103 isolation amplifier provides both signal
and power across an isolation barrier. The ceramic
non-hermetic hybrid package with side-brazed pins
contains a transformer-coupled DC/DC converter and
a capacitor-coupled signal channel.
Extra power is available on the isolated input side for
external input conditioning circuitry. The converter is
protected from shorts to ground with an internal cur-
rent limit, and the soft-start feature limits the initial
currents from the power source. Multiple-channel syn-
chronization can be accomplished by applying a TTL
clock signal to paralleled Sync pins. The Enable con-
APPLICATIONS
q MULTICHANNEL ISOLATED DATA
ACQUISITION
q ISOLATED 4-20mA LOOP RECEIVER AND
POWER
q POWER SUPPLY AND MOTOR CONTROL
q GROUND LOOP ELIMINATION
+V_C
V_IN
–V_C
Com 1
Gnd 1
+V_CC1
Ps Gnd
–V_CC1
Duty Cycle
Modulator
Sync
Rectifiers
Filters
Duty Cycle
Demodulator
Sense
V_OUT
Oscillator
Driver
*Ground if not used
Com 2
–V_CC2
Sync*
+V_CC2
Enable
Gnd 2
trol is used to turn off transformer drive while keeping
the signal channel demodulator 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
ISO103 easy to use, as well as providing for compact
PC board layouts.
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©_{1989 Burr-Brown Corporation}
PDS-1004E
Printed in U.S.A. August, 1999