ISO175 Datasheet, PDF (1/8 Pages) Burr-Brown (TI) – Precision, Isolated INSTRUMENTATION AMPLIFIER

®
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: V_O = ±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
V_IN–
22 R_G
q TEST EQUIPMENT
q POWER MONITORING
q GROUND LOOP ELIMINATION
2
R_G
24
V_IN+
Com1
23
21
Ext Osc
4
+V_S1
GND1
20
–V_S1
3
15
+V_S2
Shield 2
14
V_OUT
11
Com2
10
–V_S2
13
GND2
12
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©_{1996 Burr-Brown Corporation}
PDS-1293A
Printed in U.S.A. May, 1996