ISO122
Precision Lowest Cost
ISOLATION AMPLIFIER
FEATURES
q
100% TESTED FOR HIGH-VOLTAGE
BREAKDOWN
q
q
q
q
q
RATED 1500Vrms
HIGH IMR: 140dB at 60Hz
BIPOLAR OPERATION: V
O
=
±
10V
16-PIN PLASTIC DIP AND 28-LEAD SOIC
EASE OF USE: Fixed Unity Gain
Configuration
APPLICATIONS
q
INDUSTRIAL PROCESS CONTROL:
Transducer Isolator, Isolator for Thermo-
couples, RTDs, Pressure Bridges, and
Flow Meters, 4mA to 20mA Loop Isolation
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GROUND LOOP ELIMINATION
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MOTOR AND SCR CONTROL
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POWER MONITORING
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PC-BASED DATA ACQUISITION
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TEST EQUIPMENT
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0.020% max NONLINEARITY
q
±
4.5V to
±
18V SUPPLY RANGE
DESCRIPTION
The ISO122 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 ISO122 is easy to use. No external components
are required for operation. The key specifications are
0.020% 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 ISO122 is available in 16-pin plastic DIP and 28-
lead plastic surface mount packages.
+V
S1
V
IN
V
OUT
–V
S2
Gnd
+V
S2
–V
S1
Gnd
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
©
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
1989 Burr-Brown Corporation
PDS-857F
Printed in U.S.A. November, 1993
SBOS160
BURR-BROWN [ BURR-BROWN CORPORATION ]
