MOD
Shield 1
Ext Osc
+V
S1
+V
S2
V
S1
Com1
V
S2
GND2
20
3
23
13
12
5
22
4
15
Shield 2
OUT
Com2
14
11
10
V
OUT
V
IN
V
IN+
21
2
24
1
GND1
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
OPERATIONAL AMPLIFIER
DESCRIPTION
ISO166 and ISO176 are precision isolation amplifiers
incorporating an uncommitted operational amplifier
for input conditioning, a novel duty cycle modulation-
demodulation technique and excellent accuracy. Inter-
nal input protection can withstand up to
30V differ-
ential without damage. The signal is transmitted digi-
tally across a differential capacitive barrier. With digi-
tal 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. ISO166 and ISO176 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.
FEATURES
q
RATED
1500Vrms Continuous
2500Vrms for One Minute
100% TESTED FOR PARTIAL DISCHARGE
q
HIGH IMR: 115dB at 50Hz
q
LOW NONLINEARITY:
0.05%
q
LOW INPUT BIAS CURRENT:
5nA max
q
LOW INPUT OFFSET VOLTAGE:
20
V
q
OP AMP INPUTS PROTECTED TO
30V
q
MOD INPUT PROTECTED TO
100V
q
BIPOLAR OPERATION: V
O
=
10V
q
SYNCHRONIZATION CAPABILITY
q
24-PIN PLASTIC DIP: 0.3" Wide
ISO166
ISO176
ISO166
ISO176
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
1996 Burr-Brown Corporation
PDS-1294
Printed in U.S.A. May, 1996
2
ISO166/ISO176
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.
SPECIFICATIONS
At T
A
= +25
C, V
S1
= V
S2
=
15V, and R
L
= 2k
unless otherwise noted.
ISO166P
ISO176P
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
ISOLATION
(1)
Voltage Rated Continuous:
AC
T
MIN
to T
MAX
1500
1500
Vrms
DC
T
MIN
to T
MAX
2121
2121
VDC
100% Test (AC, 50Hz)
1s; Partial Discharge
5pC
2500
2500
Vrms
Isolation-Mode Rejection
AC 50Hz
1500Vrms
115
115
dB
DC
160
160
dB
Barrier Impedance
10
14
|| 6
10
14
|| 6
|| pF
Leakage Current
V
ISO
= 240Vrms, 50Hz
0.8
1
0.8
1
Arms
ISO AMP - GAIN
Gain Error
(2)
G = 1
0.05
0.05
%FSR
Gain vs Temperature
G = 1
10
10
ppm/
C
Nonlinearity
G = 1
0.052
0.102
%
ISO AMP - OFFSET VOLTAGE
Offset
50
100
mV
vs Temperature
150
500
V/
C
vs Supply
2
2
V/V
ISO AMP - INPUT
Input Resistance
200
200
k
ISO AMP - OUTPUT
Voltage Range
10
10
V
Current Drive
5
5
mA
Capacitive Load Drive
0.1
0.1
F
Ripple Voltage
10
10
mVp-p
OP AMP - INPUT
Voltage Range
13
13
V
Bias Current
5
5
nA
vs Temperature
15
15
pA/
C
Offset Voltage
20
20
V
Offset Current
5
5
nA
vs Temperature
1.5
1.5
pA/
C
FREQUENCY RESPONSE
Small Signal Bandwidth
100mV, G = 1
6
60
kHz
100mV, G = 10
6
60
kHz
100mV, G = 100
6
60
kHz
Slew Rate
V
O
=
10V, G = 10
0.3
0.3
V/
s
POWER SUPPLIES
Rated Voltage
15
15
V
Voltage Range
4.5
18
4.5
18
V
Quiescent Current
V
CC1
9
9
mA
V
CC2
7.5
7.5
mA
TEMPERATURE RANGE
Operating
40
85
40
85
C
Storage
40
125
40
125
C
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.
3
ISO166/ISO176
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................................................
18V
Op Amp Analog Input Voltage Range .................................................
V
S1
External Oscillator Input .....................................................................
25V
Signal Common 1 to Ground 1 ............................................................
1V
Signal Common 2 to Ground 2 ............................................................
1V
Continuous Isolation Voltage: .................................................... 1500Vrms
IMV, dv/dt ...................................................................................... 20kV/
s
Junction Temperature ...................................................................... 150
C
Storage Temperature ...................................................... 40
C to +125
C
Lead Temperature (soldering, 10s) ................................................ +300
C
Output Short Duration .......................................... Continuous to Common
MOD Input Voltage Range ...............................................................
100V
PACKAGE INFORMATION
PACKAGE DRAWING
PRODUCT
PACKAGE
NUMBER
(1)
ISO166P
24-Pin Plastic DIP
243-2
ISO176P
24-Pin Plastic DIP
243-2
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
ORDERING INFORMATION
PRODUCT
PACKAGE
BANDWIDTH
ISO166P
24-Pin Plastic DIP
6kHz
ISO176P
24-Pin Plastic DIP
60kHz
Any integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet
published specifications.
ELECTROSTATIC
DISCHARGE SENSITIVITY
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S1
= V
S2
=
15V, and R
L
= 2k
,
unless otherwise noted.
1
Frequency (Hz)
0
60
40
20
PSRR (dB)
PSRR vs FREQUENCY
100
10k
1M
10
1k
100k
V
S1
, V
S2
+V
S1
, +V
S2
54
V
S1
+V
S1
Shield 1
Ext OSC
MOD
GND 1
Com 2
OUT
GND 2
+V
S2
Shield 2
V
S2
V
OUT
Com 1
V
IN+
1
2
3
4
5
24
23
22
21
20
10
11
12
15
14
13
V
IN
100
Frequency (Hz)
10
1k
100
Peak Isolation Voltage
ISOLATION MODE VOLTAGE vs FREQUENCY
10k
1M
100M
1k
100k
10M
2.1k
Max AC
Rating
Degraded
Performance
Max DC Rating
Typical
Performance
4
ISO166/ISO176
1
Frequency (Hz)
0.1A
100mA
10mA
1mA
100A
10A
1A
Leakage Current (rms)
ISOLATION LEAKAGE CURRENT
vs FREQUENCY
100
10k
1M
10
1k
100k
240 Vrms
1500 Vrms
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S1
= V
S2
=
15V, and R
L
= 2k
,
unless otherwise noted.
2
1
0
1
2
40
15
10
35
60
85
Temperature (C)
INPUT BIAS AND INPUT OFFSET CURRENT
vs TEMPERATURE
Input Bias and Input Offset Current (nA)
I
B
I
OS
1
Frequency (Hz)
40
160
140
120
100
80
60
IMR (dB)
100
10k
1M
10
1k
100k
IMR vs FREQUENCY
0
f
IN
(Hz)
0
20
40
V
OUT
/V
IN
(dB)
SIGNAL RESPONSE
vs CARRIER FREQUENCY ISO176
f
C
2f
C
3f
C
0
0
0
0
f
c
/2
f
C
/2
f
C
/2
f
OUT
(Hz)
20dB/dec (for comparison only)
15
10
5
0
5
10
10
5
0
5
10
15
SINE RESPONSE ISO176
(10kHz)
Input Voltage (V)
Input Voltage (V)
Time (s)
0
20
40
60
80
100
120
140
160
180
200
15
10
5
0
5
10
10
5
0
5
10
15
SINE RESPONSE ISO176
(2kHz)
Input Voltage (V)
Input Voltage (V)
Time (s)
0
100
200
300
400
500
600
700
800
900 1000
5
ISO166/ISO176
15
5
5
15
10
0
10
20
STEP RESPONSE ISO166
(1kHz)
Input Voltage (V)
Input Voltage (V)
Time (s)
0
50
100
150
200
250
300
350
400
450
500
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S1
= V
S2
=
15V, and R
L
= 2k
,
unless otherwise noted.
20
10
0
10
10
0
10
20
SINE RESPONSE ISO166
(1kHz)
Input Voltage (V)
Input Voltage (V)
Time (s)
0
20
40
60
80
100
120
140
160
180
200
15
10
5
0
5
10
10
5
0
5
10
15
STEP RESPONSE ISO176
(2kHz)
Input Voltage (V)
Input Voltage (V)
Time (s)
0
50
100
150
200
250
300
350
400
450
500
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