廬
ISO
256
ISO256
Precision, Powered, Three-Port Isolated
OPERATIONAL AMPLIFIER
FEATURES
q
RATED
1500Vrms Continuous
2500Vrms for One Minute
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100% TESTED FOR PARTIAL DISCHARGE
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LOW NONLINEARITY:
鹵
0.05% typ
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LOW INPUT BIAS CURRENT:
鹵
5nA max
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INPUTS PROTECTED TO
鹵
30V
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BIPOLAR OPERATION V
O
=
鹵
10V
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SYNCHRONIZATION CAPABILITY
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28-PIN PLASTIC DIP: 0.6" Wide
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
鹵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
FB
鈥揤
IN
V
OUT
MOD
1
ISO256
APPLICATIONS
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INDUSTRIAL PROCESS CONTROL
Transducer Isolator, Thermocouple
Isolator, RTD Isolator, Pressure Bridge
Isolator, Flow Meter Isolator
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POWER MONITORING
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MEDICAL INSTRUMENTATION
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ANALYTICAL MEASUREMENTS
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BIOMEDICAL MEASUREMENTS
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DATA ACQUISITION
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TEST EQUIPMENT
q
GROUND LOOP ELIMINATION
3
OPA
4
+V
IN
14
26
28
27
25
Com1
+V
S1
鈥揤
S1
GND1
Com2
+V
S2
鈥揤
S2
GND2
13
12
11
10
GND3 SYNC
17
16
+V
S3
15
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400
Tel: (520) 746-1111 鈥?Twx: 910-952-1111 鈥?Cable: BBRCORP 鈥?/div>
漏
鈥?Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd. 鈥?Tucson, AZ 85706
Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
PDS-1311B
Printed in U.S.A. April, 1996
1996 Burr-Brown Corporation
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