BB INA143UA

®
INA
INA143
INA2143
214
3
INA
143
For most current data sheet and other product
information, visit www.burr-brown.com
High-Speed, Precision, G = 10 or G = 0.1
DIFFERENCE AMPLIFIERS
FEATURES
APPLICATIONS
● DESIGNED FOR LOW COST
● G = 10V/V or G = 0.1V/V
● DIFFERENTIAL INPUT AMPLIFIER
BUILDING BLOCK
● DIFF IN/DIFF OUT AMPLIFIER
● SINGLE, DUAL VERSIONS
● LOW OFFSET VOLTAGE:
±250µV max, ±3µV/°C max
● GAIN = –10 INVERTING AMPLIFIER
● GAIN = +10 NON-INVERTING AMPLIFIER
● LOW GAIN ERROR: 0.01%
● HIGH SLEW RATE: 5V/µs
● GAIN = +11 NON-INVERTING AMPLIFIER
● SYNCHRONOUS DEMODULATOR
● FAST SETTLING TIME: 9µs to 0.01%
● LOW QUIESCENT CURRENT: 950µA
● CURRENT/DIFFERENTIAL LINE RECEIVER
● VOLTAGE-CONTROLLED CURRENT SOURCE
● WIDE SUPPLY RANGE: ±2.25V to ±18V
● SO-8 and SO-14 PACKAGES
● BATTERY POWERED SYSTEMS
● LOW COST AUTOMOTIVE
DESCRIPTION
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 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 commonmode 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.
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.
V+
11
–In A
2
10kΩ
100kΩ
12
Sense A
V+
–In
2
10kΩ
100kΩ
5
6
+In
3
10kΩ
13
A
7
100kΩ
1
Sense
+In A
–In B
Output
3
6
10kΩ
100kΩ
10kΩ
100kΩ
INA143
4
+In B
5
10kΩ
100kΩ
V–
10
9
B
Ref
14
8
Out A
Ref A
Sense B
Out B
Ref B
INA2143
4
V–
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-1531A
Printed in U.S.A. June, 1999
SPECIFICATIONS: VS = ±15V
At TA = +25°C, VS = ±15V, G = 10, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
INA143U
INA2143U
PARAMETER
CONDITIONS
OFFSET VOLTAGE(1)
Initial(1)
vs Temperature
vs Power Supply
vs Time
Channel Separation (dual)
MIN
RTI
VCM = 0V
VS = ±2.25V to ±18V
dc
INPUT IMPEDANCE(3)
Differential
Common-Mode
TYP
MAX
±100
±1
±5
0.2
140
±250
±3
±20
MIN
20
55
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Positive
Negative
Common-Mode Rejection Ratio
TYP
MAX
UNITS
✻
±500
See Typical Curve
✻
±30
✻
µV
µV/°C
µV/V
µV/√mo
dB
✻
✻
kΩ
kΩ
✻
✻
✻
V
V
dB
✻
✻
✻
✻
µVp-p
nV/√Hz
nV/√Hz
nV/√Hz
RTI
VCM
✻
✻
80
VO = 0V
1.1[(V+)– 1.5] 1.1[(V+) –1]
1.1[(V–) +1.5] 1.1[(V–) + 1]
VO = 0V
= –14.85V to 14.85V, RS = 0Ω
86
96
OUTPUT VOLTAGE NOISE(3)
f = 0.1Hz to 10Hz
f = 10Hz
f = 100Hz
f = 1kHz
RTI
1
45
30
27
GAIN
Initial
Error
vs Temperature
Nonlinearity
10
±0.01
±1
±0.0001
VO = –14V to +13.5V
VO = –14V to +13.5V
OUTPUT
Voltage Output
Positive
Negative
Positive
Negative
Current Limit
Capacitive Load (stable operation)
FREQUENCY RESPONSE
Small-Signal Bandwidth
Slew Rate
Settling Time: 0.1%
0.01%
Overload Recovery Time
Gain Error < 0.1%
RL = 10kΩ to Ground
RL = 10kΩ to Ground
R L = 100kΩ to Ground
R L = 100kΩ to Ground
Continuous-to-Common
(V+) –1.5
(V–) +1
–3dB
VO = 10V Step, CL = 100pF
VO = 10V Step, CL = 100pF
50% Overdrive
POWER SUPPLY
Rated Voltage
Operating Voltage Range
Dual Supplies
Single Supply
Quiescent Current (per amplifier)
TEMPERATURE RANGE
Specification
Operation
Storage
Thermal Resistance
SO-8 Surface Mount
SO-14 Surface Mount
INA143UA
INA2143UA
✻
✻
±0.1
✻
±0.002
V/V
%
ppm/°C
% of FS
✻
✻
✻
✻
✻
✻
V
V
V
V
mA
pF
0.15
5
6
9
6
✻
✻
✻
✻
✻
MHz
V/µs
µs
µs
µs
±15
✻
V
(V+) –1.3
(V–) +0.8
(V+) –0.8
(V–) +0.3
–25, +32
1000
±2.25
+4.5
±0.95
IO = 0
✻
✻
✻
✻
±0.05
±10
±0.001
–40
–55
–55
±18
+36
±1.2
✻
✻
+85
+125
+125
✻
✻
✻
✻
θJA
150
100
✻
✻
✻
✻
✻
V
V
mA
✻
✻
✻
°C
°C
°C
°C/W
°C/W
✻ 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.
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.
®
INA143, INA2143
2
SPECIFICATIONS: VS = ±5V
At TA = +25°C, VS = ±5V, G = 10, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
INA143U
INA2143U
PARAMETER
CONDITIONS
OFFSET VOLTAGE(1)
Initial(1)
vs Temperature
MIN
RTI
VCM = 0V
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Positive
Negative
Common-Mode Rejection Ratio
INA143UA
INA2143UA
TYP
MAX
±200
±1
±500
MIN
TYP
MAX
UNITS
✻
✻
±750
µV
µV/°C
RTI
✻
✻
80
VO = 0V
1.1[(V+)– 1.5] 1.1[(V+) –1]
1.1[(V–) +1.5] 1.1[(V–) +1]
VO = 0V
VCM = –3.85V to +3.85V, RS = 0Ω
86
96
GAIN
Initial
Gain Error
Nonlinearity
10
±0.01
±0.0001
VO = –4V to +3.5V
VO = –4V to +3.5V
OUTPUT
Voltage Output
Positive
Negative
Positive
Negative
Gain Error < 0.1%
RL = 10kΩ to Ground
RL = 10kΩ to Ground
R L = 100kΩ to Ground
R L = 100kΩ to Ground
POWER SUPPLY
Rated Voltage
Operating Voltage Range
Dual Supplies
Single Supply
Quiescent Current (per amplifier)
(V+) –1.5
(V–) +1
✻
✻
✻
±0.05
±0.001
✻
✻
(V+)–1.3
(V–)+0.8
(V+)–0.8
(V–)+0.3
+5
±2.25
+4.5
±0.92
IO = 0
✻
✻
✻
±18
+36
±1.2
V
V
dB
±0.1
±0.002
V/V
%
% of FS
✻
✻
✻
✻
V
V
V
V
✻
V
✻
✻
✻
✻
✻
✻
V
V
mA
✻ Specifications the same as INA143U, INA2143U.
NOTES: (1) Includes the effects of amplifier’s input bias and offset currents.
ABSOLUTE MAXIMUM RATINGS(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
Supply Voltage, V+ to V– .................................................................... 36V
Input Signal (G = 10), Voltage ..................................................... 1.1 • VS
Current ........................................................ 0.5mA
Input Signal (G = 0.1), Voltage ..................................................... 11 • VS
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
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.
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.
PACKAGE/ORDERING INFORMATION
PRODUCT
Single
INA143U
"
INA143UA
"
Dual
INA2143U
"
INA2143UA
"
PACKAGE
PACKAGE
DRAWING
NUMBER(1)
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER(2)
TRANSPORT
MEDIA
SO-8 Surface Mount
182
–40°C to +85°C
INA143U
"
"
"
"
SO-8 Surface Mount
182
–40°C to +85°C
INA143UA
"
"
"
"
INA143U
INA143U/2K5
INA143UA
INA143UA/2K5
Rails
Tape and Reel
Rails
Tape and Reel
SO-14 Surface Mount
235
–40°C to +85°C
INA2143U
"
"
"
"
SO-14 Surface Mount
235
–40°C to +85°C
INA2143UA
INA2143U
INA2143U/2K5
INA2143UA
Rails
Tape and Reel
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.
®
3
INA143, INA2143
PIN CONFIGURATIONS
Top View
SO-8
Top View
SO-14
INA2143
INA143
Ref
1
8
NC
–In
2
7
V+
+In
3
6
Output
V–
4
5
Sense
NC
1
–In A
2
14
Ref A
13
Out A
A
+In A
3
12
Sense A
V–
4
11
V+
+In B
5
10
Sense B
B
–In B
6
9
Out B
NC
7
8
Ref B
NC = No Connection
NC = No Connection
®
INA143, INA2143
4
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, G = 10, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
COMMON-MODE REJECTION vs FREQUENCY
100
0
90
Closed-Mode Rejection (dB)
Closed-Loop Gain (dB)
GAIN vs FREQUENCY
5
–5
–10
–15
80
70
60
50
VS = ±15V or ±5V
VS = ±15V or ±5V
–20
40
10k
100k
1M
100
1k
Frequency (Hz)
POWER SUPPLY REJECTION vs FREQUENCY
100k
1M
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
32
Peak-to-Peak Output Voltage (V)
120
Power Supply Rejection (dB)
10k
Frequency (Hz)
100
–PSRR
80
60
+PSRR
40
20
VS = ±15V
28
24
20
16
12
VS = ±5V
8
4
0
1
10
100
1k
10k
100k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
20
0.1
VS = ±15V
500kHz Filter
10
5
THD+N (%)
Common-Mode Voltage (V)
15
0
–5
–10
0.01
VS = ±5V
–15
–20
0.001
–15
–10
–5
0
5
10
15
20
Output Voltage (V)
100
1k
10k
20k
Frequency (Hz)
®
5
INA143, INA2143
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, G = 10, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
0.1Hz TO 10Hz PEAK-TO-PEAK
VOLTAGE NOISE
VOLTAGE NOISE DENSITY vs FREQUENCY
0.5µV/div
Voltage Noise (nV/√Hz)
100
10
1
10
100
1k
10k
500µs/div
Frequency (Hz)
QUIESCENT CURRENT vs TEMPERATURE
SLEW RATE vs TEMPERATURE
1400
7
VS = ±15V
VS = ±5V
Per Amplifier
–SR
6
Slew Rate (V/µs)
1200
1100
1000
900
5
+SR
4
800
3
700
–75
–50
–25
0
25
50
75
100
125
–75
–50
–25
Temperature (°C)
SHORT-CIRCUIT CURRENT vs TEMPERATURE
25
50
75
100
–40°C
(V+) –5
+ISC
Output Voltage (V)
25°C
30
–ISC
25
+ISC
20
125
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
V+
VS = ±15V
VS = ±5V
35
0
Temperature (°C)
40
Short-Circuit |mA|
Quiescent Current (µA)
1300
(V+) –10
85°C
0
85°C
25°C
(V–) +10
(V–) +5
–40°C
–ISC
15
(V–)
–75
–50
–25
0
25
50
75
100
0
125
®
INA143, INA2143
±5
±10
±15
±20
Output Current (mA)
Temperature (°C)
6
±25
±30
±35
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, G = 10, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
VS = ±15V
30
20
Typical production
distribution of
packaged units.
Singles and duals
included.
20
Typical production
distribution of
packaged units.
Singles and duals
included.
18
16
Percent of Units (%)
25
Percent of Units (%)
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
VS = ±5V
15
10
14
12
10
8
6
4
5
2
0
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
VS = ±5V
60
30
20
40
0
0
2
2.5
3
3.5
4
4.5
5
5.5
700
600
20
10
1.5
500
30
10
1
Typical production
distribution of
packaged units.
Singles and duals
included.
50
Percent of Units (%)
40
0.5
400
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
VS = ±15V
Typical production
distribution of
packaged units.
Singles and duals
included.
0
300
200
0
100
–100
–200
–300
Offset Voltage (µV)
50
0
6
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Offset Voltage Drift (µV/°C)
Offset Voltage Drift (µV/°C)
CHANNEL SEPARATION vs FREQUENCY
SETTLING TIME vs CAPACITIVE LOAD
150
20
G = 10
G = 0.1
Channel Separation (dB)
0.01%, VS = ±15V
15
Settling Time (µs)
–400
–500
–600
Offset Voltage (µV)
60
Percent of Units (%)
–700
–500
–450
–400
–350
–300
–250
–200
–150
–100
–50
0
50
100
150
200
250
300
350
400
450
500
0
0.01%, VS = ±15V
0.01%, VS = ±5V
10
5
140
130
120
0.1%, VS = ±15V
INA2143
110
0
0
500
1000
100
1500
1k
10k
100k
Frequency (Hz)
Capacitive Load (pF)
®
7
INA143, INA2143
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, G = 10, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
LARGE-SIGNAL STEP RESPONSE
SMALL-SIGNAL STEP RESPONSE
CL = 100pF
5V/div
100mV/div
CL = 500pF
CL = 1500pF
25µs/div
2.5µs/div
®
INA143, INA2143
8
APPLICATIONS INFORMATION
throughout the full operating voltage range. Parameters which
vary significantly with operating voltage are shown in the
Typical Performance Curves.
The INA143 and INA2143 are high-speed difference amplifiers suitable for a wide range of general-purpose applications. 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.
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 10Ω to maintain good
common-mode rejection.
Decoupling capacitors are strongly recommended for applications 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-circuited.
As shown in Figure 1, the differential input signal is connected to pins 2 and 3. The source impedances connected to
the inputs must be nearly equal to assure good commonmode rejection. A 5Ω 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 commonmode rejection.
INA143
–In
V2
5
R1
10kΩ
R2
100kΩ
2
6
The INA143’s internal resistors are accurately ratio trimmed
to match. That is, R1/R2 and R3/R4 are trimmed to equal 0.1.
However, the absolute values may not be equal (R1 + R2 may
be slightly different than R3 + R4). Thus, large series resistors
on the input (greater than 100Ω), even if well matched, will
degrade common-mode rejection.
VO = 0.1 (V3 – V2)
+In
1
V3
R3
10kΩ
R4
100kΩ
3
FIGURE 2. G = 0.1 Difference Amplifier.
V+
V–
1µF
1µF
G = 10
7
4
INA143
INA143
–In
V2
2
R1
10kΩ
R2
100kΩ
2
V2
5
R2
100kΩ
R1
10kΩ
5
6
VO
6
VO = 10 (V3 – V2)
+In
V3
3
R3
10kΩ
R4
100kΩ
10Ω
V3
3
R3
10kΩ
1
Compensates
for impedance at
pin 1—see text.
R4
100kΩ
+15V
1
499kΩ
FIGURE 1. G = 10 Basic Power Supply and Signal Connections.
100kΩ
VO = 10 (V3 – V2)
Offset Adjustment
Range = ±3mV
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
100Ω
–15V
FIGURE 3. Offset Adjustment.
®
9
INA143, INA2143
INA143
V1
–In
10Ω
V1
10kΩ
2
100kΩ
5
200Ω
A1
Gain
Adjust
INA143
2
R2
10kΩ
100kΩ
5
VO
6
6
R1
VO
R2
10Ω
V2
10kΩ
3
100kΩ
1
200Ω
3
CMR
Adjust
A2
To eliminate adjustment interactions,
first adjust gain with V2 grounded.
10kΩ
100kΩ
1
V0 = 10 (1 + 2R2 /R1) (V2 – V1)
V2
+In
FIGURE 4. Difference Amplifier with Gain and CMR Adjust.
The INA143 can be combined with op amps to form a complete instrumentation 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.
INA143
10kΩ
V2
100kΩ
2
5
6
10kΩ
VO = –10 • V2
100kΩ
3
1
A1, A2
FEATURE
SIMILAR COMPLETE
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
FIGURE 7. Precision Instrumentation Amplifier.
Gain Error = 0.05% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 1ppm/°C
INA143
R1
10kΩ
2
R2
100kΩ
5
FIGURE 5. Precision G = –10 Inverting Amplifier.
V1
1
R4
100kΩ
INA143
R1
10kΩ
2
VIN
R2
100kΩ
R4
100kΩ
1
V3
VO = V1 + 10 • V3
R3
10kΩ
3
5
6
±55V
Without
Damage
6
FIGURE 8. Precision Summing Amplifier.
VO = VIN
INA143
R3
10kΩ
2
10kΩ
100kΩ
5
3
1
VIN
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.
10kΩ
FIGURE 9. Precision G = 11 Buffer.
®
INA143, INA2143
3
100kΩ
10
6
VO = 11 • VIN
Gain Error =
0.05% maximum