ISO176 is a precision isolation amplifier incorporating
an uncommitted operational amplifier for input condi-
tioning, a novel duty cycle modulation-demodulation
technique and excellent accuracy. Internal input pro-
tection can withstand up to
±30V
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. Both
the amplifier and barrier capacitors are housed in a
plastic DIP.
ISO176 is easy to use. No external components are
required. A power supply range of
±4.5V
to
±18V
makes this amplifier ideal for a wide range of applica-
tions.
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
POWER MONITORING
q
GROUND LOOP ELIMINATION
5
Shield 1
21
2
MOD
V
OUT
Shield 2
14
22
Ext Osc
4
+V
S1
15
+V
S2
OUT
11
24
1
V
IN–
V
IN+
GND1
20
–V
S1
3
23
Com1
–V
S2
13
Com2
10
GND2
12
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
NOTE: (1) All devices receive a 1s test. Failure criterion is
≥
5 pulses of
≥
5pX. (2) Tested as a OPA and ISO, max
±0.35%
FSR.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
ISO176
2
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................................................
±18V
Op Amp Analog Input Voltage Range .................................................
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