ISO122
Precision Lowest Cost
ISOLATION AMPLIFIER
FEATURES
APPLICATIONS
q 100% TESTED FOR HIGH-VOLTAGE
BREAKDOWN
q INDUSTRIAL PROCESS CONTROL:
Transducer Isolator, Isolator for Thermocouples, RTDs, Pressure Bridges, and
Flow Meters, 4mA to 20mA Loop Isolation
q GROUND LOOP ELIMINATION
q MOTOR AND SCR CONTROL
q
q
q
q
q
RATED 1500Vrms
HIGH IMR: 140dB at 60Hz
BIPOLAR OPERATION: VO = ±10V
16-PIN PLASTIC DIP AND 28-LEAD SOIC
EASE OF USE: Fixed Unity Gain
Configuration
q POWER MONITORING
q PC-BASED DATA ACQUISITION
q TEST EQUIPMENT
q 0.020% max NONLINEARITY
q ±4.5V to ±18V SUPPLY RANGE
DESCRIPTION
The ISO122 is a precision isolation amplifier incorporating a novel duty cycle modulation-demodulation
technique. The signal is transmitted digitally across
a 2pF differential capacitive barrier. With digital modulation 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.
VIN
VOUT
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 VOS drift. A power supply range of
±4.5V to ±18V and quiescent currents of ±5.0mA on
VS1 and ±5.5mA on VS2 make these amplifiers ideal
for a wide range of applications.
The ISO122 is available in 16-pin plastic DIP and 28lead plastic surface mount packages.
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
©
SBOS160
1989 Burr-Brown Corporation
–VS2
Gnd
+VS2
–VS1
+VS1
Gnd
• 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
PDS-857F
Printed in U.S.A. November, 1993
