®
ISO
165
ISO165
ISO175
ISO
175
Precision, Isolated
INSTRUMENTATION AMPLIFIER
FEATURES
q
RATED
1500Vrms Continuous
2500Vrms for One Minute
100% TESTED FOR PARTIAL DISCHARGE
q
HIGH IMR: 115dB at 50Hz
q
LOW NONLINEARITY:
±
0.01%
q
LOW INPUT BIAS CURRENT: 10nA max
q
LOW INPUT OFFSET VOLTAGE: 101mV max
q
INPUTS PROTECTED TO
±
40V
q
BIPOLAR OPERATION: V
O
=
±
10V
q
SYNCHRONIZATION CAPABILITY
q
24-PIN PLASTIC DIP: 0.3" Wide
DESCRIPTION
ISO165 and ISO175 are precision isolated instrumen-
tation amplifiers incorporating a novel duty cycle
modulation-demodulation technique and excellent ac-
curacy. A single external resistor sets the gain. Internal
input protection can withstand up to
±40V
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. ISO165 and ISO175 differ in frequency
response and linearity.
These amplifiers are easy to use. A power supply
range of
±4.5V
to
±18V
makes these amplifiers ideal
for a wide range of applications.
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
1
22
V
IN–
FBP
21
Ext Osc
4
+V
S1
15
+V
S2
14
Shield 2
V
OUT
2
24
FBN
V
IN+
Com1
23
GND1
20
–V
S1
3
–V
S2
13
Com2
11
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1996 Burr-Brown Corporation
PDS-1293
Printed in U.S.A. May, 1996
SPECIFICATIONS
At T
A
= +25°C, V
S1
= V
S2
=
±15V,
and R
L
= 2kΩ unless otherwise noted.
ISO165P
PARAMETER
ISOLATION
(1)
Voltage Rated Continuous:
AC
DC
100% Test (AC, 50Hz)
Isolation-Mode Rejection
AC 50Hz
DC
Barrier Impedance
Leakage Current
GAIN
CONDITIONS
MIN
TYP
MAX
MIN
ISO175P
TYP
MAX
UNITS
T
MIN
to T
MAX
T
MIN
to T
MAX
1s; Partial Discharge
≤
5pC
1500Vrms
1500
2121
2500
115
160
10
14
|| 6
0.8
50k
1+
R
G
1500
2121
2500
115
160
10
14
|| 6
0.8
50k
1+
R
G
Vrms
VDC
Vrms
dB
dB
Ω
|| pF
µArms
V/V
±0.35
±0.95
±0.102
±0.104
101
±
0.125
+
G
520
±
1
+
G
±2
VISO = 240Vrms, 50Hz
1
1
Gain Error
Gain vs Temperature
Nonlinearity
G=1
G = 10
G = 100
G=1
G=1
G = 10
G = 100
G = 1, 100
±0.07
±11
±0.01
±0.35
±0.95
±0.052
±0.054
51
±
0.125
+
G
±0.07
±11
±0.04
%
%
%
ppm/°C
%
%
%
mV
µV/°C
mV/V
V
nA
pA/°C
nA
pA/°C
V
mA
µF
mVp-p
kHz
kHz
kHz
V/µs
V
V
mA
mA
°C
°C
INPUT OFFSET VOLTAGE
Initial Offset
vs Temperature
vs Supply
INPUT
Voltage Range
Bias Current
vs Temperature
Offset Current
vs Temperature
OUTPUT
Voltage Range
Current Drive
Capacitive Load Drive
Ripple Voltage
FREQUENCY RESPONSE
Small Signal Bandwidth
G=1
±10
170
±
1
+
G
±2
±40
±40
±10
±5
0.1
10
G=1
G = 10
G = 100
V
O
=
±10V,
G = 10
6
6
6
0.9
15
±4.5
±10
±10
±10
±40
±40
±10
±5
0.1
10
60
60
50
0.9
15
±10
±10
Slew Rate
POWER SUPPLIES
Rated Voltage
Voltage Range
Quiescent Current
V
S1
V
S2
TEMPERATURE RANGE
Operating
Storage
±18
±7.4
±7.5
±4.5
±18
±7.4
±7.5
–40
–40
85
125
–40
–40
85
125
NOTE: (1) All devices receive a 1s test. Failure criterion is
≥
5 pulses of
≥
5pc.
®
ISO165/ISO175
2
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................................................
±18V
Analog Input Voltage Range ..............................................................
±40V
External Oscillator Input .....................................................................
±25V
Com 1 to GND1 ...................................................................................
±1V
Com 2 to GND2 ...................................................................................
±1V
Continuous Isolation Voltage: .................................................... 1500Vrms
IMV, dv/dt ...................................................................................... 20kV/µs
Junction Temperature ...................................................................... 150°C
Storage Temperature ...................................................... –40°C to +125°C
Lead Temperature (soldering, 10s) ................................................ +300°C
Output Short Duration .......................................... Continuous to Common
PIN CONFIGURATION
V
IN–
FBN
V
S1–
V
S1+
Shield 1
1
2
3
4
5
24 V
IN+
23 Com 1
22 FBP
21 EXT OSC
20 GND 1
ELECTROSTATIC
DISCHARGE SENSITIVITY
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.
Com 2 10
V
OUT
11
GND 2 12
15 V
S2+
14 Shield 2
13 V
S2–
PACKAGE INFORMATION
MODEL
ISO165P
ISO175P
PACKAGE
24-Pin Plastic DIP
24-Pin Plastic DIP
PACKAGE DRAWING
NUMBER
(1)
243-2
243-2
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
ORDERING INFORMATION
MODEL
ISO165P
ISO175P
PACKAGE
24-Pin Plastic DIP
24-Pin Plastic DIP
BANDWIDTH
6kHz
60kHz
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.
®
3
ISO165/ISO175
TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
S1
= V
S2
=
±15V,
and R
L
= 2kΩ unless otherwise noted.
ISOLATION MODE VOLTAGE
vs FREQUENCY
PSRR vs FREQUENCY
60
54
Max AC
Rating
Max DC Rating
Peak Isolation Voltage
2k
1k
Degraded
Performance
100
Typical
Performance
10
100
1k
10k
100k
Frequency (Hz)
1M
40
PSRR (dB)
+V
S1
, +V
S2
20
–V
S1
, –V
S2
0
10M
100M
1
10
100
1k
Frequency (Hz)
10k
100k
1M
ISOLATION LEAKAGE CURRENT
vs FREQUENCY
100mA
10mA
IMR vs FREQUENCY
160
140
120
Leakage Current (rms)
1mA
1500 Vrms
100µA
10µA
1µA
0.1µA
1
10
100
1k
Frequency (Hz)
10k
100k
1M
240 Vrms
IMR (dB)
100
80
60
40
1
10
100
1k
Frequency (Hz)
10k
100k
1M
SIGNAL RESPONSE vs CARRIER FREQUENCY
15
SINE RESPONSE ISO175
(f = 2kHz, Gain = 10)
0
Output Voltage (V)
10
V
OUT
/V
IN
(dB)
–20dB/dec (for comparison only)
–20
5
0
–5
–10
–15
–40
f
IN
(Hz)
0
f
c
/2
f
C
0
f
C
/2
2f
C
0
f
C
/2
3f
C
0
0
200
400
600
800
1000
Time (µs)
f
OUT
(Hz) 0
®
ISO165/ISO175
4
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25°C, V
S1
= V
S2
=
±15V,
and R
L
= 2kΩ unless otherwise noted.
SINE RESPONSE ISO175
(f = 20kHz, Gain = 10)
15
10
STEP RESPONSE ISO175
15
10
5
0
–5
–10
Output Voltage (V)
5
0
–5
–10
–15
0
200
400
600
800
1000
Time (µs)
Output Voltage (V)
10
5
0
–5
–10
–15
0
100
200
300
400
500
Time (µs)
STEP RESPONSE ISO175
15
10
5
0
–5
–10
Output Voltage (V)
Input Voltage (V)
80
G = 1000
GAIN vs FREQUENCY ISO175
60
10
5
0
–5
–10
–15
0
20
40
Time (µs)
60
80
100
Gain (dB)
40
G = 100
G = 10
20
G=1
0
–20
1k
10k
Frequency (Hz)
100k
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE
15
INPUT BIAS AND OFFSET CURRENT
vs TEMPERATURE
Input Bias and Offset Current (nA)
G
≥
10
G
≥
10
5
4
3
2
1
0
–1
–2
–3
–4
–5
–75
–50
–25
0
25
50
75
100
125
I
OS
±I
b
Common-Mode Voltage (V)
10
G=1
5
0
–5
–10
–15
–15
V
D/2
V
D/2
V
CM
–
+
–
+
V
O
G=1
All
Gains
–10
–5
0
5
All
Gains
10
15
Output Voltage (V)
Temperature (°C)
Input Voltage (V)
®
5
ISO165/ISO175
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