® ISO175
ISO175
Precision, Isolated
INSTRUMENTATION AMPLIFIER
FEATURES
q RATED
1500Vrms Continuous
2500Vrms for One Minute
100% TESTED FOR PARTIAL DISCHARGE
q HIGH IMR: 115dB at 50Hz
q LOW NONLINEARITY: ±0.01%
q LOW INPUT BIAS CURRENT: 10nA max
q LOW INPUT OFFSET VOLTAGE: 101mV max
q INPUTS PROTECTED TO ±40V
q BIPOLAR OPERATION: VO = ±10V
q SYNCHRONIZATION CAPABILITY
q 24-PIN PLASTIC DIP: 0.3" Wide
DESCRIPTION
ISO175 is a precision isolated instrumentation ampli-
fier incorporating a novel duty cycle modulation-
demodulation technique and excellent accuracy. A
single external resistor sets the gain. Internal input
protection can withstand up to ±40V without damage.
The signal is transmitted digitally across a differential
capacitive barrier. With digital modulation the barrier
characteristics do not affect signal integrity. This re-
sults in excellent reliability and good high frequency
transient immunity across the barrier. Both the ampli-
fier and barrier capacitors are housed in a plastic DIP.
ISO175 is easy to use. A power supply range of ±4.5V
to ±18V makes this amplifier ideal for a wide range of
applications.
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
Transducer Isolator, Thermocouple
Isolator, RTD Isolator, Pressure Bridge
Isolator, Flow Meter Isolator
q POWER MONITORING
q MEDICAL INSTRUMENTATION
q ANALYTICAL MEASUREMENTS
q BIOMEDICAL MEASUREMENTS
q DATA ACQUISITION
5
Shield 1
1 VIN–
22 RG
q TEST EQUIPMENT
q POWER MONITORING
q GROUND LOOP ELIMINATION
2 RG
24 VIN+
Com1
23
21
Ext Osc
4
+VS1
GND1
20
–VS1
3
15
+VS2
Shield 2
14
VOUT
11
Com2
10
–VS2
13
GND2
12
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
©1996 Burr-Brown Corporation
PDS-1293A
Printed in U.S.A. May, 1996
