ISO256 Datasheet, PDF (1/9 Pages) Burr-Brown (TI) – Precision, Powered, Three-Port Isolated OPERATIONAL AMPLIFIER

®
ISO256
ISO256
Precision, Powered, Three-Port Isolated
OPERATIONAL AMPLIFIER
FEATURES
q RATED
1500Vrms Continuous
2500Vrms for One Minute
q 100% TESTED FOR PARTIAL DISCHARGE
q LOW NONLINEARITY: ±0.05% typ
q LOW INPUT BIAS CURRENT: ±5nA max
q INPUTS PROTECTED TO ±30V
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
ISO256 is a precision three-port isolation operational
amplifier incorporating an uncommitted operational
amplifier for input conditioning and a novel duty cycle
modulation-demodulation technique which has excel-
lent accuracy. Internal input protection can withstand
up to ±30V 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 re-
sults 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.
2
1
FB MOD
3 ^–VIN
4 ^+VIN
OPA
Com1
26
28 ^+VS1
27 ^–VS1
GND1
25
ISO256
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-1311B
Printed in U.S.A. April, 1996