
1996 Burr-Brown Corporation
PDS-1307B
Printed in U.S.A. February, 1996
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 Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
Precision, Isolated
PROGRAMMABLE GAIN AMPLIFIER
DESCRIPTION
ISO164 and ISO174 are PGA input isolation amplifi-
ers incorporating a novel duty cycle modulation-de-
modulation technique which provides excellent accu-
racy. Internal input protection can withstand up to
±
40V differential inputs 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. Both the amplifier and
barrier capacitors are housed in a plastic DIP. ISO164
and ISO174 differ in frequency response and linearity.
These amplifiers are easy to use. No external compo-
nents are required. A power supply range of
±
4.5V to
±
18V makes these amplifiers ideal for a wide range of
applications.
ISO164
ISO174
FEATURES
G
RATED
1500Vrms Continuous
2500Vrms for One Minute
100% TESTED FOR PARTIAL DISCHARGE
G
PROGRAMMABLE GAINS OF
1, 10, 100
G
HIGH IMR: 115dB at 50Hz
G
LOW NONLINEARITY:
±
0.01%
G
LOW INPUT BIAS CURRENT:
±
5nA max
G
INPUTS PROTECTED TO
±
40V
G
BIPOLAR OPERATION: V
O
=
±
10V
G
SYNCHRONIZATION CAPABILITY
G
24-PIN PLASTIC DIP: 0.6" Wide
APPLICATIONS
G
INDUSTRIAL PROCESS CONTROL
Transducer Isolator, Thermocouple
Isolator, RTD Isolator, Pressure Bridge
Isolator, Flow Meter Isolator
G
POWER MONITORING
G
MEDICAL INSTRUMENTATION
G
ANALYTICAL MEASUREMENTS
G
BIOMEDICAL MEASUREMENTS
G
DATA ACQUISITION
G
TEST EQUIPMENT
G
POWER MONITORING
G
GROUND LOOP ELIMINATION
V
IN–
Ext Osc
V
S1+
V
S2+
GND 1
V
S1–
2
V
S2–
13
20
21
1
15
Shield 2
V
OUT
Com 2
14
11
10
GND 2
12
A1
A0
V
IN+
3
24
23
4
DGND
22
Com1/
Shield 1
5
ISO174
ISO164
FPO