1999 Burr-Brown Corporation
PDS-1531A
Printed in U.S.A. June, 1999
FEATURES
q
DESIGNED FOR LOW COST
q
G = 10V/V or G = 0.1V/V
q
SINGLE, DUAL VERSIONS
q
LOW OFFSET VOLTAGE:
250
V max,
3
V/
C max
q
LOW GAIN ERROR: 0.01%
q
HIGH SLEW RATE: 5V/
s
q
FAST SETTLING TIME: 9
s to 0.01%
q
LOW QUIESCENT CURRENT: 950
A
q
WIDE SUPPLY RANGE:
2.25V to
18V
q
SO-8 and SO-14 PACKAGES
APPLICATIONS
q
DIFFERENTIAL INPUT AMPLIFIER
BUILDING BLOCK
q
DIFF IN/DIFF OUT AMPLIFIER
q
GAIN = 10 INVERTING AMPLIFIER
q
GAIN = +10 NON-INVERTING AMPLIFIER
q
GAIN = +11 NON-INVERTING AMPLIFIER
q
SYNCHRONOUS DEMODULATOR
q
CURRENT/DIFFERENTIAL LINE RECEIVER
q
VOLTAGE-CONTROLLED CURRENT SOURCE
q
BATTERY POWERED SYSTEMS
q
LOW COST AUTOMOTIVE
DESCRIPTION
The INA143 and INA2143 are high slew rate, gain of
10V/V or 0.1V/V difference amplifiers consisting of a
precision op amp with a precision resistor network. The
on-chip resistors are laser trimmed for accurate gain and
high common-mode rejection. Excellent TCR tracking
of the resistor maintains gain accuracy and common-
mode rejection over temperature. They operate over a
wide supply range,
2.25V to
18V (+4.5V to +36V
single supply), and input common-mode voltage range
extends beyond the positive and negative supply rails.
INA143
INA2143
High-Speed, Precision, G = 10 or G = 0.1
DIFFERENCE AMPLIFIERS
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
The differential amplifier is the foundation of many
commonly used circuits. The low cost INA143 and
INA2143 provide this precision circuit function without
using an expensive precision network.
The single version, INA143, package is the SO-8 surface
mount. The dual version, INA2143, package is the SO-14
surface mount. Both are specified for operation over the
extended industrial temperature range, 40
C to +85
C.
Operation is from 55
C to +125
C.
10k
100k
Sense
INA143
Output
V+
Ref
In
+In
5
6
1
2
7
V
4
3
10k
100k
Sense A
INA2143
Out A
V+
Ref A
In A
+In A
12
13
14
2
11
V
4
3
10k
100k
10k
100k
10k
100k
10k
100k
B
A
Sense B
Out B
Ref B
In B
+In B
10
9
8
6
5
INA143
INA2143
For most current data sheet and other product
information, visit www.burr-brown.com
2
INA143, INA2143
INA143U
INA143UA
INA2143U
INA2143UA
SPECIFICATIONS: V
S
=
15V
At T
A
= +25
C, V
S
=
15V, G = 10, R
L
= 10k
connected to ground, and reference pin connected to ground, unless otherwise noted.
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.
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
(1)
RTI
Initial
(1)
V
CM
= 0V
100
250
T
500
V
vs Temperature
1
3
See Typical Curve
V/
C
vs Power Supply
V
S
=
2.25V to
18V
5
20
T
30
V/V
vs Time
0.2
T
V/
mo
Channel Separation (dual)
dc
140
dB
INPUT IMPEDANCE
(3)
Differential
20
T
k
Common-Mode
55
T
k
INPUT VOLTAGE RANGE
RTI
Common-Mode Voltage Range
Positive
V
O
= 0V
1.1[(V+) 1.5] 1.1[(V+) 1]
T
T
V
Negative
V
O
= 0V
1.1[(V) +1.5] 1.1[(V) + 1]
T
T
V
Common-Mode Rejection Ratio
V
CM
= 14.85V to 14.85V, R
S
= 0
86
96
80
T
dB
OUTPUT VOLTAGE NOISE
(3)
RTI
f = 0.1Hz to 10Hz
1
T
Vp-p
f = 10Hz
45
T
nV/
Hz
f = 100Hz
30
T
nV/
Hz
f = 1kHz
27
T
nV/
Hz
GAIN
Initial
10
T
V/V
Error
V
O
= 14V to +13.5V
0.01
0.05
T
0.1
%
vs Temperature
1
10
T
T
ppm/
C
Nonlinearity
V
O
= 14V to +13.5V
0.0001
0.001
T
0.002
% of FS
OUTPUT
Voltage Output
Gain Error < 0.1%
Positive
R
L
= 10k
to Ground
(V+) 1.5
(V+) 1.3
T
T
V
Negative
R
L
= 10k
to Ground
(V) +1
(V) +0.8
T
T
V
Positive
R
L
= 100k
to Ground
(V+) 0.8
T
V
Negative
R
L
= 100k
to Ground
(V) +0.3
T
V
Current Limit
Continuous-to-Common
25, +32
T
mA
Capacitive Load (stable operation)
1000
T
pF
FREQUENCY RESPONSE
Small-Signal Bandwidth
3dB
0.15
T
MHz
Slew Rate
5
T
V/
s
Settling Time: 0.1%
V
O
= 10V Step, C
L
= 100pF
6
T
s
0.01%
V
O
= 10V Step, C
L
= 100pF
9
T
s
Overload Recovery Time
50% Overdrive
6
T
s
POWER SUPPLY
Rated Voltage
15
T
V
Operating Voltage Range
Dual Supplies
2.25
18
T
T
V
Single Supply
+4.5
+36
T
T
V
Quiescent Current (per amplifier)
I
O
= 0
0.95
1.2
T
T
mA
TEMPERATURE RANGE
Specification
40
+85
T
T
C
Operation
55
+125
T
T
C
Storage
55
+125
T
T
C
Thermal Resistance
JA
SO-8 Surface Mount
150
T
C/W
SO-14 Surface Mount
100
T
C/W
T
Specifications the same as INA143U, INA2143U.
NOTES: (1) Includes the effects of amplifier's input bias and offset currents. (2) Internal resistors are ratio matched but have
20% absolute value. (3) Includes
effects of amplifier's input current noise and thermal noise contribution of resistor network.
3
INA143, INA2143
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
(1)
RTI
Initial
(1)
V
CM
= 0V
200
500
T
750
V
vs Temperature
1
T
V/
C
INPUT VOLTAGE RANGE
RTI
Common-Mode Voltage Range
Positive
V
O
= 0V
1.1[(V+) 1.5] 1.1[(V+) 1]
T
T
V
Negative
V
O
= 0V
1.1[(V) +1.5] 1.1[(V) +1]
T
T
V
Common-Mode Rejection Ratio
V
CM
= 3.85V to +3.85V, R
S
= 0
86
96
80
T
dB
GAIN
Initial
10
T
V/V
Gain Error
V
O
= 4V to +3.5V
0.01
0.05
T
0.1
%
Nonlinearity
V
O
= 4V to +3.5V
0.0001
0.001
T
0.002
% of FS
OUTPUT
Voltage Output
Gain Error < 0.1%
Positive
R
L
= 10k
to Ground
(V+) 1.5
(V+)1.3
T
T
V
Negative
R
L
= 10k
to Ground
(V) +1
(V)+0.8
T
T
V
Positive
R
L
= 100k
to Ground
(V+)0.8
T
V
Negative
R
L
= 100k
to Ground
(V)+0.3
T
V
POWER SUPPLY
Rated Voltage
+5
T
V
Operating Voltage Range
Dual Supplies
2.25
18
T
T
V
Single Supply
+4.5
+36
T
T
V
Quiescent Current (per amplifier)
I
O
= 0
0.92
1.2
T
T
mA
T
Specifications the same as INA143U, INA2143U.
NOTES: (1) Includes the effects of amplifier's input bias and offset currents.
INA143U
INA143UA
INA2143U
INA2143UA
SPECIFICATIONS: V
S
=
5V
At T
A
= +25
C, V
S
=
5V, G = 10, R
L
= 10k
connected to ground, and reference pin connected to ground, unless otherwise noted.
Supply Voltage, V+ to V .................................................................... 36V
Input Signal (G = 10), Voltage ..................................................... 1.1 V
S
Current ........................................................ 0.5mA
Input Signal (G = 0.1), Voltage ..................................................... 11 V
S
Current ....................................................... 0.5mA
Output Short-Circuit (to ground)
(2)
.......................................... Continuous
Operating Temperature .................................................. 55
C to +125
C
Storage Temperature ..................................................... 55
C to +125
C
Junction Temperature .................................................................... +150
C
Lead Temperature (soldering, 10s) ............................................... +300
C
NOTES: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability. (2) One channel per package.
ABSOLUTE MAXIMUM RATINGS
(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate 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
SPECIFIED
DRAWING
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
PACKAGE
NUMBER
(1)
RANGE
MARKING
NUMBER
(2)
MEDIA
Single
INA143U
SO-8 Surface Mount
182
40
C to +85
C
INA143U
INA143U
Rails
"
"
"
"
"
INA143U/2K5
Tape and Reel
INA143UA
SO-8 Surface Mount
182
40
C to +85
C
INA143UA
INA143UA
Rails
"
"
"
"
"
INA143UA/2K5
Tape and Reel
Dual
INA2143U
SO-14 Surface Mount
235
40
C to +85
C
INA2143U
INA2143U
Rails
"
"
"
"
"
INA2143U/2K5
Tape and Reel
INA2143UA
SO-14 Surface Mount
235
40
C to +85
C
INA2143UA
INA2143UA
Rails
"
"
"
"
"
INA2143UA/2K5
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. (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 "INA143UA/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.
PACKAGE/ORDERING INFORMATION
4
INA143, INA2143
PIN CONFIGURATIONS
Top View
SO-8
Top View
SO-14
Ref
In
+In
V
NC
V+
Output
Sense
NC = No Connection
INA143
1
2
3
4
8
7
6
5
NC
In A
+In A
V
+In B
In B
NC
Ref A
Out A
Sense A
V+
Sense B
Out B
Ref B
NC = No Connection
1
2
3
4
5
6
7
14
13
12
11
10
9
8
A
B
INA2143
5
INA143, INA2143
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S
=
15V, G = 10, R
L
= 10k
connected to ground, and reference pin connected to ground, unless otherwise noted.
GAIN vs FREQUENCY
Frequency (Hz)
Closed-Loop Gain (dB)
10k
100k
1M
5
0
5
10
15
20
V
S
=
15V or
5V
COMMON-MODE REJECTION vs FREQUENCY
Frequency (Hz)
Closed-Mode Rejection (dB)
100
10k
100k
1k
1M
100
90
80
70
60
50
40
V
S
=
15V or
5V
POWER SUPPLY REJECTION vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
1
100
1k
10k
10
100k
120
100
80
60
40
20
PSRR
+PSRR
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
Frequency (Hz)
Peak-to-Peak Output Voltage (V)
10k
100k
1M
32
28
24
20
16
12
8
4
0
V
S
=
15V
V
S
=
5V
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE
Output Voltage (V)
Common-Mode Voltage (V)
15
0
5
10
5
10
15
20
15
10
5
0
5
10
15
20
V
S
=
5V
V
S
=
15V
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
Frequency (Hz)
THD+N (%)
20
1k
10k
100
20k
0.1
0.01
0.001
500kHz Filter
6
INA143, INA2143
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
15V, G = 10, R
L
= 10k
connected to ground, and reference pin connected to ground, unless otherwise noted.
VOLTAGE NOISE DENSITY vs FREQUENCY
Frequency (Hz)
Voltage Noise (nV/
Hz)
1
100
1k
10
10k
100
10
QUIESCENT CURRENT vs TEMPERATURE
Temperature (
C)
Quiescent Current (
A)
75
50
25
25
50
75
100
0
125
1400
1300
1200
1100
1000
900
800
700
Per Amplifier
SLEW RATE vs TEMPERATURE
Temperature (
C)
Slew Rate (V/
s)
75
50
25
25
50
75
100
0
125
7
6
5
4
3
SR
+SR
V
S
=
15V
V
S
=
5V
SHORT-CIRCUIT CURRENT vs TEMPERATURE
Temperature (
C)
Short-Circuit |mA|
75
50
25
25
50
75
100
0
125
40
35
30
25
20
15
+I
SC
+I
SC
I
SC
I
SC
V
S
=
15V
V
S
=
5V
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
Output Current (mA)
Output Voltage (V)
0
15
20
25
30
10
5
35
40
C
25
C
85
C
85
C
25
C
40
C
V+
(V+) 5
(V+) 10
0
(V) +10
(V) +5
(V)
0.1Hz TO 10Hz PEAK-TO-PEAK
VOLTAGE NOISE
500
s/div
0.5
V/div
7
INA143, INA2143
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
15V, G = 10, R
L
= 10k
connected to ground, and reference pin connected to ground, unless otherwise noted.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
V
S
=
15V
Percent of Units (%)
Offset Voltage (
V)
30
25
20
15
10
5
0
500
450
400
350
300
250
200
150
100
50
0
50
100
150
200
250
300
350
400
450
500
Typical production
distribution of
packaged units.
Singles and duals
included.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
V
S
=
5V
Percent of Units (%)
Offset Voltage (
V)
20
18
16
14
12
10
8
6
4
2
0
700
600
500
400
300
200
100
0
100
200
300
400
500
600
700
Typical production
distribution of
packaged units.
Singles and duals
included.
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
V
S
=
15V
Percent of Units (%)
Offset Voltage Drift (
V/
C)
60
50
40
30
20
10
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Typical production
distribution of
packaged units.
Singles and duals
included.
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
V
S
=
5V
Percent of Units (%)
Offset Voltage Drift (
V/
C)
60
50
40
30
20
10
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Typical production
distribution of
packaged units.
Singles and duals
included.
SETTLING TIME vs CAPACITIVE LOAD
Settling Time (
s)
Capacitive Load (pF)
20
15
10
5
0
0
500
1000
1500
0.01%, V
S
=
15V
0.01%, V
S
=
15V
G = 10
G = 0.1
0.1%, V
S
=
15V
0.01%, V
S
=
5V
CHANNEL SEPARATION vs FREQUENCY
Channel Separation (dB)
Frequency (Hz)
150
140
130
120
110
100
1k
10k
100k
INA2143
8
INA143, INA2143
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
15V, G = 10, R
L
= 10k
connected to ground, and reference pin connected to ground, unless otherwise noted.
SMALL-SIGNAL STEP RESPONSE
2.5
s/div
100mV/div
C
L
= 100pF
C
L
= 1500pF
LARGE-SIGNAL STEP RESPONSE
25
s/div
5V/div
C
L
= 500pF
9
INA143, INA2143
APPLICATIONS INFORMATION
The INA143 and INA2143 are high-speed difference ampli-
fiers suitable for a wide range of general-purpose applica-
tions. Figure 1 shows the basic G = 10 configuration. The
input and feedback resistors can be reversed to achieve
G = 0.1, as shown in Figure 2. For applications requiring
G = 1, the INA133 and INA2133 are recommended.
Decoupling capacitors are strongly recommended for appli-
cations with noisy or high impedance power supplies. The
capacitors should be placed close to the device pins as
shown in Figure 1. All circuitry is completely independent
in the dual version assuring lowest crosstalk and normal
behavior when one amplifier is overdriven or short-cir-
cuited.
As shown in Figure 1, the differential input signal is con-
nected to pins 2 and 3. The source impedances connected to
the inputs must be nearly equal to assure good common-
mode rejection. A 5
mismatch in source impedance will
degrade the common-mode rejection of a typical device to
approximately 86dB (RTI). If the source has a known
impedance mismatch, an additional resistor in series with
the opposite input can be used to preserve good common-
mode rejection.
The INA143's internal resistors are accurately ratio trimmed
to match. That is, R
1
/R
2
and R
3
/R
4
are trimmed to equal 0.1.
However, the absolute values may not be equal (R
1
+ R
2
may
be slightly different than R
3
+ R
4
). Thus, large series resistors
on the input (greater than 100
), even if well matched, will
degrade common-mode rejection.
V
3
5
6
1
3
INA143
V
O
= 10 (V
3
V
2
)
2
R
3
10k
R
4
100k
R
1
10k
R
2
100k
V
2
In
+In
1
F
V
4
1
F
V+
7
FIGURE 1. G = 10 Basic Power Supply and Signal Connections.
OPERATING VOLTAGE
The INA143 and INA2143 operate from single (+4.5V to
+36V) or dual (
2.25V to
18V) supplies with excellent
performance. Specifications are production tested with
5V
and
15V supplies. Most behavior remains unchanged
throughout the full operating voltage range. Parameters which
vary significantly with operating voltage are shown in the
Typical Performance Curves.
OFFSET VOLTAGE TRIM
The INA143 and INA2143 are laser trimmed for low offset
voltage and drift. Most applications require no external offset
adjustment. Figure 3 shows an optional circuit for trimming
the output offset voltage. The output is referred to the output
reference terminal (pin 1), which is normally grounded. A
voltage applied to the Ref terminal will be summed with the
output signal. This can be used to null offset voltage as
shown in Figure 3. The source impedance of a signal applied
to the Ref terminal should be less than 10
to maintain good
common-mode rejection.
V
3
2
6
3
1
INA143
V
O
= 0.1 (V
3
V
2
)
5
R
4
100k
R
3
10k
R
2
100k
R
1
10k
V
2
In
+In
FIGURE 2. G = 0.1 Difference Amplifier.
FIGURE 3. Offset Adjustment.
V
3
5
6
3
V
O
INA143
V
O
= 10 (V
3
V
2
)
Offset Adjustment
Range =
3mV
Compensates
for impedance at
pin 1--see text.
G = 10
2
R
4
100k
V
2
10
499k
100
100k
+15V
15V
1
R
3
10k
R
1
10k
R
2
100k
10
INA143, INA2143
SIMILAR COMPLETE
A
1
, A
2
FEATURE
BURR-BROWN IA
OPA2227
Low Noise
INA103
OPA129
Ultra Low Bias Current (fA)
INA116
OPA2277
Low Offset Drift, Low Noise
INA114, INA128
OPA2130
Low Power, FET-Input (pA)
INA121
OPA2234
Single Supply, Precision, Low Power
INA122, INA118
OPA2237
Single Supply, Low Power, MSOP-8
INA122, INA126
The INA143 can be combined with op amps to form a complete instrumenta-
tion amplifier with specialized performance characteristics. Burr-Brown offers
many complete high performance IAs. Products with related performances
are shown at the right in the table below.
FIGURE 9. Precision G = 11 Buffer.
FIGURE 4. Difference Amplifier with Gain and CMR Adjust.
FIGURE 5. Precision G = 10 Inverting Amplifier.
This circuit follows an 11/1 divider with a gain of 11 for an overall gain of unity.
With an 11/1 divider, the input signal can exceed 55V without damage as
long as input current is less than 0.5mA.
FIGURE 6. Voltage Follower with Input Protection.
FIGURE 7. Precision Instrumentation Amplifier.
FIGURE 8. Precision Summing Amplifier.
10
10
10k
100k
10k
100k
200
200
V
1
V
2
2
3
5
1
6
V
O
Gain
Adjust
CMR
Adjust
INA143
To eliminate adjustment interactions,
first adjust gain with V
2
grounded.
V
2
2
5
6
INA143
3
V
O
= 10 V
2
1
Gain Error = 0.05% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 1ppm/
C
10k
100k
10k
100k
2
5
6
INA143
3
R
3
10k
V
O
= V
IN
V
IN
R
1
10k
R
4
100k
1
R
2
100k
55V
Without
Damage
V
1
In
2
3
5
10k
100k
10k
100k
1
6
INA143
V
0
= 10 (1 + 2R
2
/R
1
) (V
2
V
1
)
A
2
A
1
V
2
+In
R
1
R
2
V
O
R
2
2
5
6
INA143
V
1
R
1
10k
R
4
100k
1
R
2
100k
R
3
10k
3
V
3
V
O
= V
1
+ 10 V
3
10k
100k
5
6
INA143
V
O
= 11 V
IN
1
2
100k
10k
V
IN
3
Gain Error =
0.05% maximum
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