ISO255 Datasheet, PDF (1/9 Pages) Burr-Brown (TI) – Precision, Powered, Three-Port Isolated INSTRUMENTATION AMPLIFIER

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ISO255
ISO255
Precision, Powered, Three-Port Isolated
INSTRUMENTATION AMPLIFIER
FEATURES
q RATED
1500Vrms Continuous
2500Vrms for One Minute
100% Tested for Partial Discharge
q GAINS OF 1 TO 10,000
q LOW NONLINEARITY: ±0.05% typ
q LOW INPUT BIAS CURRENT: ±10nA max
q LOW INPUT OFFSET VOLTAGE
q INPUTS PROTECTED TO ±40V
q BIPOLAR OPERATION V_O = ±10V
q SYNCHRONIZATION CAPABILITY
q 28-PIN PLASTIC DIP: 0.6" Wide
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
q TEST EQUIPMENT
q GROUND LOOP ELIMINATION
DESCRIPTION
ISO255 is a precision three-port isolated instrumenta-
tion amplifier incorporating a novel duty cycle modu-
lation-demodulation technique and has excellent accu-
racy. Internal input protection can withstand up to
±40V input differential without damage. The signal is
transmitted digitally across a differential capacitive
barrier. With digital modulation the barrier character-
istics do not affect signal integrity. This results in
excellent reliability and good high frequency transient
immunity across the barrier. The DC/DC converter,
amplifier and barrier capacitors are housed in a plastic
DIP.
A power supply range of 11V to 18V makes this
amplifier ideal for a wide range of applications.
4 ^+VIN
1 ^+RG
2 ^–RG
INA
3 ^–VIN
Com1
26
28 ^+VS1
27 ^–VS1
GND1
25
ISO255
V_{OUT 14}
Com2
13
+V_{S2 12}
–V_{S2 11}
GND2
10
GND3 SYNC +V_S3
17 16 15
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Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1996 Burr-Brown Corporation}
PDS-1312B
Printed in U.S.A. April, 1996