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®
INA146
INA146
For most current data sheet and other product
information, visit www.burr-brown.com
High-Voltage, Programmable Gain
DIFFERENCE AMPLIFIER
FEATURES
q HIGH COMMON-MODE VOLTAGE:
+40V at VS = +5V
±100V at VS = ±15V
q DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
Set with External Resistors
q LOW QUIESCENT CURRENT: 570µA
q WIDE SUPPLY RANGE:
Single Supply: 4.5V to 36V
Dual Supplies: ±2.25V to ±18V
q LOW GAIN ERROR: 0.025%
q HIGH CMR: 80dB
q SO-8 PACKAGE
APPLICATIONS
q CURRENT SHUNT MEASUREMENTS
q SENSOR AMPLIFIER
q SYNCHRONOUS DEMODULATOR
q CURRENT AND DIFFERENTIAL LINE
RECEIVER
q VOLTAGE-CONTROLLED CURRENT
SOURCE
q BATTERY POWERED SYSTEMS
q LOW COST AUTOMOTIVE
INSTRUMENTATION
V+
7
R1
100k
VIN– 2
R2
10k
G = 0.1
A1
R3
100k
VIN+ 3
R4
10k
4
V–
DESCRIPTION
The INA146 is a precision difference amplifier that
can be used to accurately attenuate high differential
voltages and reject high common-mode voltages for
compatibility with common signal processing voltage
levels. High-voltage capability also affords inherent
input protection. The input common-mode range ex-
tends beyond both supply rails, making the INA146
well-suited for both single and dual supply applica-
tions.
On-chip precision resistors are laser-trimmed to achieve
accurate gain and high common-mode rejection. Ex-
cellent TCR tracking of these resistors assures contin-
ued high precision over temperature.
A 10:1 difference amplifier provides 0.1V/V gain
when the output amplifier is used as a unity-gain
buffer. In this configuration, input voltages up to
±100V can be measured. Gains greater than 0.1V/V
can be set with an external resistor pair without affect-
ing the common-mode input range.
The INA146 is available in the SO-8 surface-mount
package specified for the extended industrial tempera-
ture range, –40°C to +85°C.
RG1
RG2
5
R5
10k
(1%)
A2 6 VO
VO = (VI+N – VI–N) 0.1 (1 + RG2/RG1)
INA146
18
Ref V01
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 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1999 Burr-Brown Corporation
PDS-11491A
INA146Printed in U.S.A. September, 1999
®

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SPECIFICATIONS: VS = ±2.25V to ±18V Dual Supplies
At TA = +25°C, G = 0.1, RL = 10kconnected to ground and ref pin connected to ground unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C.
INA146UA
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE, VO
Input Offset Voltage
vs Temperature
vs Power Supply
vs Time
Offset Voltage, V01
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection
Over Temperature
VOS
VOS /T
PSRR
VCM
CMRR
RTI(1, 2)
VS = ±15, VCM = VO = 0V
VS = ±1.35V to ±18V
RTI(1, 2)
(VIN+) – (VIN–) = 0V, VO = 0V
VCM = 11 (V–) to 11 (V+) = 11, RS = 0
±1
See Typical Curve
±100
±3
±1
±5
±600
±100(3)
70 80
64 74
mV
µV/ V
µV/mo
mV
V
dB
dB
INPUT BIAS CURRENT(2)
Bias Current
Offset Current
INPUT IMPEDANCE
Differential (non-inverting input)
Differential (inverting input)
Common-Mode
IB
IOS
VCM = VS /2
±50
±5
110
91.7
55
nA
nA
k
k
k
NOISE
Voltage Noise, f = 0.1Hz to 10Hz
Voltage Noise Density, f = 1kHz
GAIN
Gain Equation
Initial(1)
Gain Error
vs Temperature
vs Temperature
Nonlinearity
FREQUENCY RESPONSE
Small Signal Bandwidth
Slew Rate
Settling Time, 0.1%
0.01%
Overload Recovery
RTI(1, 4)
en
RL = 100k, VO = (V–)+0.15 to (V+)–1, G = 1
RL = 100k, VO = (V–)+0.25 to (V+)–1, G = 1
RL = 10k, VO = (V–)+0.3 to (V+)–1.25, G = 1
RL = 10k, VO = (V–)+0.5 to (V+)–1.25, G = 1
VO = (V–)+0.3 to (V+)–1.25, G = 1
G = 0.1
G=1
G = 1, 10V Step
G = 1, 10V Step
50% Input Overload
10
550
G = 0.1 to 100
G = 0.1 • (1 + RG2/ RG1)
0.1
±0.025
±0.1
±1 ±10
±0.025
±0.1
±1 ±10
±0.001
±0.01
550
50
0.45
40
80
40
µVp-p
nV/Hz
V/ V
V/ V
%
ppm / °C
%
ppm / °C
% of FS
kHz
kHz
V/µs
µs
µs
µs
OUTPUT, VO
Voltage Output
Over Temperature
Over Temperature
Short-Circuit Current
Capacitive Load
RL = 100k, G = 1
RL = 100k, G = 1
RL = 10k, G = 1
RL = 10k, G = 1
Continuous to Common
Stable Operation
(V–) + 0.15
(V–) + 0.25
(V–) + 0.3
(V–) + 0.5
±15
1000
(V+) – 1
(V+) – 1
(V+) – 1.25
(V+) – 1.25
V
V
V
V
mA
pF
POWER SUPPLY
Specified Voltage Range, Dual Supplies
Operating Voltage Range
Quiescent Current
Over Temperature
VIN = 0, IO = 0
±2.25
±1.35
±570
±18
±18
±700
±750
V
V
µA
µA
TEMPERATURE RANGE
Specified Range
Operating Range
Storage Range
Thermal Resistance
θJA
–40 +85 °C
–55
+125
°C
–55
+125
°C
150 °C/W
NOTES: (1) Overall difference amplifier configuration. Referred to input pins (VIN+ and VIN–), gain = 0.1V/V. Specified with 10kin feedback of A2. (2) Input offset
voltage specification includes effects of amplifier’s input bias and offset currents. (3) Common-mode voltage range is 11 (V–) to 11 [(V+) – 1] with a maximum of ±100V.
(4) Includes effects of input current noise and thermal noise contribution of resistor network.
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.
®
INA146
2

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SPECIFICATIONS: VS = +5V Single Supply
At TA = +25°C, G = 1, RL = 10kconnected to VS /2 and Ref pin connected to VS /2 unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C.
INA146UA
PARAMETER
CONDITION
MIN TYP
MAX
UNITS
OFFSET VOLTAGE, VO
Input Offset Voltage
VOS
vs Temperature
VOS /T
vs Power Supply Rejection Ratio PSRR
vs Time
RTI(1, 2)
VCM = VO = 0V
VS = ±1.35V to ±18V
±3
See Typical Curve
±100
±3
±10
±600
mV
µV/ °C
µV/mo
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
Over Temperature
VCM
CMRR
VIN+ – VIN– = 0V, VO = 0V
VCM = –25V to +19V, RS = 0
–25 19 V
70 80
dB
64 74
dB
INPUT BIAS CURRENT(2)
Bias Current
Offset Current
INPUT IMPEDANCE
Differential (non-inverting input)
Differential (inverting input)
Common-Mode
IB
IOS
±50 nA
±5 nA
110 k
91.7 k
55 k
NOISE
Voltage Noise, f = 0.1Hz to 10Hz
Voltage Noise Density, f = 1kHz
GAIN
Gain Equation
Initial(1)
Gain Error
vs Temperature
vs Temperature
Nonlinearity
FREQUENCY RESPONSE
Small Signal Bandwidth
Slew Rate
Settling Time, 0.1%
0.01%
Overload Recovery
RTI(1, 3, 4)
en
RL = 100k, VO = 0.15V to 4V, G = 1
RL = 100k, VO = 0.25V to 4V, G = 1
RL = 10k, VO = 0.3V to 3.75V, G = 1
RL = 10k, VO = 0.5V to 3.75V, G = 1
VO = +0.3 to +3.75, G = 1
G = 0.1
G=1
G = 1, 10V Step
G = 1, 10V Step
50% Input Overload
10
550
G = 0.1 to 100
G = 0.1 • (1 + RG2 / RG1)
0.1
±0.025
±0.1
±1 ±10
±0.025
±0.1
±1 ±10
±0.001
±0.01
550
50
0.45
40
80
40
µVp-p
nV/Hz
V/V
V/ V
V/ V
%
ppm / °C
%
ppm / °C
% of FS
kHz
kHz
V/µs
µs
µs
µs
OUTPUT, VO
Voltage Output
Over Temperature
Over Temperature
Short-Circuit Current
Capacitive Load
RL = 100k, G = 1
RL = 100k, G = 1
RL = 10k, G = 1
RL = 10k, G = 1
Continuous to Common
Stable Operation
0.15
0.25
0.3
0.5
±15
1000
4
4
3.75
3.75
V
V
V
V
mA
pF
POWER SUPPLY
Voltage Range, Dual Supplies
Voltage Range, Single Supply
Quiescent Current
Over Temperature
VIN = 0, IO = 0
±2.25
±4.5
±570
±18
±36
±700
±750
V
V
µA
µA
TEMPERATURE RANGE
Specified Range
Operating Range
Storage Range
Thermal Resistance
θJA
–40 +85 °C
–55
+125
°C
–55
+125
°C
150 °C/W
NOTES: (1) Overall difference amplifier configuration. Referred to input pins (VIN+ and VIN–), gain = 0.1V/V. Specified with 10kin feedback of A2. (2) Input offset
voltage specification includes effects of amplifier’s input bias and offset currents. (3) Includes effects of input current noise and thermal noise contribution of resistor
network. (4) Common-mode voltage range is 11 (V–) to 11 [(V+) – 1] with a maximum of ±100V.
®
3 INA146

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AMPLIFIER A1, A2 PERFORMANCE
At TA = +25°C, G = 0.1, RL = 10kconnected to ground and Ref pin, unless otherwise noted.
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C.
PARAMETER
OFFSET VOLTAGE, VO
Input Offset Voltage
vs Temperature
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
OPEN-LOOP GAIN
Open Loop Gain
INPUT BIAS CURRENT(2)
Bias Current
Offset Current
RESISTOR AT A1 OUTPUT, VO1
Initial
Error
Temperature Drift Coefficient
VOS
VOS /T
VCM
CMRR
AOL
IB
IOS
CONDITION
RTI(1, 2)
VS = ±15V, VCM = VO = 0V
TA = –40°C to +85°C
VIN+ – VIN– = 0V, VO = 0V
VCM = (V–) to (V+) –1
INA146UA
MIN TYP
MAX
±0.5
±1
(V–) to (V+) –1
90
110
±50
±5
10
±1
±100
UNITS
mV
µV/°C
V
dB
dB
nA
nA
k
%
ppm/°C
PIN CONFIGURATION
Top View
Ref 1
VI–N 2
VI+N 3
V– 4
8 VO1
7 V+
6 VO
5 RG
SO-8
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage, V+ to V– .................................................................... 36V
Signal Input Terminals, Voltage ...................................................... ±100V
Current ....................................................... ±1mA
Output Short Circuit (to ground) .............................................. Continuous
Operating Temperature .................................................. –55°C to +125°C
Storage Temperature ..................................................... –55°C to +150°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +240°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This 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 degradation
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 its published
specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT
INA146UA
"
PACKAGE
SO-8
"
PACKAGE
DRAWING
NUMBER(1)
182
"
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
"
PACKAGE
MARKING
INA146UA
"
ORDERING
NUMBER(2)
INA146UA
INA146UA/2K5
TRANSPORT
MEDIA
Rails
Tape and Reel
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book, or visit the Burr-Brown web site
at www.burr-brown.com. (2) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel).
Ordering 2500 pieces of “INA146UA/2K5” will get a single 2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of
Burr-Brown IC Data Book.
®
INA146
4

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TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, G = 0.1, RL = 10kconnected to ground and Ref pin connected to ground, unless otherwise noted.
40
20
0
–20
–40
100
GAIN vs FREQUENCY
G = 10
VS = ±15V
CL = 1000pF
G=1
G = 0.1
1K
10K 100K
1M
10M
Frequency (Hz)
40
20
0
–20
–40
100
GAIN vs FREQUENCY
VS = ±15V
G = 10 CL = 200pF 10k
G=1
G = 0.1
1K 10K 100K 1M 10M
Frequency (Hz)
COMMON-MODE REJECTION vs FREQUENCY
100
80
60
40
20
0
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
POWER SUPPLY REJECTION vs FREQUENCY
100
PSR+
(VS = ±15V)
80
PSR+
60 (VS = +5V)
40
20
0
1
PSR–
(VS = ±15V)
10 100 1k 10k 100k
Frequency (Hz)
INPUT VOLTAGE NOISE DENSITY
10k
G = 0.1
1k
G = 10
G=1
100
0.1 1 10 100 1k 10k 100k
Frequency (Hz)
0.1Hz to 10Hz VOLTAGE NOISE (RTI)
500ms/div
®
5 INA146