ISO254 Datasheet, PDF (1/9 Pages) Burr-Brown (TI) – Precision, Powered, Three-Port Isolated PROGRAMMABLE GAIN AMPLIFIER

®
ISO254
ISO254
Precision, Powered, Three-Port Isolated
PROGRAMMABLE GAIN AMPLIFIER
FEATURES
q RATED
1500Vrms Continuous
2500Vrms for One Minute
100% TESTED FOR PARTIAL DISCHARGE
q PROGRAMMABLE GAINS OF
1, 10, 100, 1000
q LOW NONLINEARITY: ±0.01% typ
q LOW INPUT BIAS CURRENT: ±5nA max
q LOW INPUT OFFSET VOLTAGE:
625µV max
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
ISO254 is a precision three-port isolated program-
mable gain instrumentation amplifier incorporating a
novel duty cycle modulation-demodulation technique
and has excellent accuracy. 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 characteristics 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.
This amplifier is easy to use as no external compo-
nents are required. A power supply range of 11V to
18V makes this amplifier ideal for a wide range of
applications.
2
1
A1 A0
3 ^+VIN
4 ^–VIN
PGA
Com1
26
28 ^+VS1
27 ^–VS1
GND1
25
ISO254
V_{OUT 14}
Com2
13
+V_{S2 12}
–V_{S2 11}
GND2
10
GND3 SYNC +V_S3
17 16 15
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1996 Burr-Brown Corporation}
PDS-1308B
Printed in U.S.A. April, 1996