®
INA
INA133
INA2133
213
3
INA
133
For most current data sheet and other product
information, visit www.burr-brown.com
High-Speed, Precision
DIFFERENCE AMPLIFIERS
FEATURES
APPLICATIONS
● DESIGNED FOR LOW COST
● SINGLE, DUAL VERSIONS
● DIFFERENTIAL INPUT AMPLIFIER
BUILDING BLOCK
● DIFF IN / DIFF OUT AMPLIFIER
● LOW OFFSET VOLTAGE DRIFT:
±450µV max, ±5µV/°C max
● LOW GAIN ERROR: 0.05% max
● UNITY-GAIN INVERTING AMPLIFIER
● GAIN = +1/2 OR G = +2 AMPLIFIER
● WIDE BANDWIDTH: 1.5MHz
● HIGH SLEW RATE: 5V/µs
● SUMMING AMPLIFIER
● SYNCHRONOUS DEMODULATOR
● FAST SETTLING TIME: 5.5µs 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 INA133 and
INA2133 provide this precision circuit function without
using an expensive precision network.
The INA133 and INA2133 are high slew rate, unitygain 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
resistors 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.
The single version, INA133, package is the SO-8 surface
mount. The dual version, INA2133, 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
25kΩ
25kΩ
12
Sense A
V+
7
–In
2
25kΩ
25kΩ
5
Sense
+In A
6
+In
3
25kΩ
13
A
25kΩ
1
Output
–In B
3
6
25kΩ
25kΩ
25kΩ
25kΩ
Ref
14
10
9
B
Out A
Ref A
Sense B
Out B
INA133
4
+In B
5
25kΩ
25kΩ
8
Ref B
V–
INA2133
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
SBOS115
PDS-1530A
Printed in U.S.A. June, 1999
SPECIFICATIONS: VS = ±15V
At TA = +25°C, VS = ±15V, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
INA133U
INA2133U
PARAMETER
CONDITIONS
OFFSET VOLTAGE(1)
Initial(1)
vs Temperature
vs Power Supply
vs Time
Channel Separation (dual)
MIN
TYP
MAX
±450
±5
±30
dc
±150
±2
±10
0.3
120
VCM = 0V
50
25
RTO
VCM = 0V
TA = –40°C to +85°C
VS = ±2.25V to ±18V
INPUT IMPEDANCE(2)
Differential
Common-Mode
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Positive
Negative
Common-Mode Rejection Ratio
VCM
VO = 0V
VO = 0V
= –27V to +27V, RS = 0Ω
OUTPUT VOLTAGE NOISE(3)
f = 0.1Hz to 10Hz
f = 10Hz
f = 100Hz
f = 1kHz
2(V+) –3
2(V–) +3
80
MIN
✻
✻
74
2(V+) –2
2(V–) +2
90
TYP
MAX
UNITS
✻
±900
See Typical Curve
900
±50
✻
✻
µV
µV/°C
µV/V
µV/√mo
dB
✻
✻
kΩ
kΩ
✻
✻
✻
V
V
dB
✻
✻
✻
✻
µVp-p
nV/√Hz
nV/√Hz
nV/√Hz
RTO
2
80
60
57
GAIN
Initial
Error
vs Temperature
Nonlinearity
1
±0.02
±1
±0.0001
VO = –14V to +13.5V
TA = –40°C to +85°C
VO = –14V to +13.5V
OUTPUT
Voltage Output
Positive
Negative
Positive
Negative
Current Limit, Continuous-to-Common
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
(V+) –1.5
(V–) +1
–3dB
10V Step, CL = 100pF
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
INA133UA
INA2133UA
✻
✻
±0.1
✻
±0.002
V/V
%
ppm/°C
% of FS
✻
✻
✻
✻
✻
✻
V
V
V
V
mA
pF
1.5
5
4
5.5
4
✻
✻
✻
✻
✻
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 INA133U, INA2133U.
NOTES: (1) Includes the effects of amplifier’s input bias and offset currents. (2) 25kΩ 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.
®
INA133, INA2133
2
SPECIFICATIONS: VS = ±5V
At TA = +25°C, VS = ±5V, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
INA133U
INA2133U
PARAMETER
CONDITIONS
OFFSET VOLTAGE(1)
Initial(1)
vs Temperature
MIN
RTO
VCM = 0V
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Positive
Negative
Common-Mode Rejection Ratio
VCM
GAIN
Initial
Gain Error
Nonlinearity
VO = 0V
VO = 0V
= –7V to +7V, RS = 0Ω
2(V+) – 3
2(V–) + 3
80
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)
TYP
MAX
±300
±2
±750
(V+) –1.5
(V–) +1
MIN
✻
✻
74
2(V+) –2
2(V–) + 2
90
1
±0.02
±0.0001
VO = –4V to 3.5V
VO = –4V to 3.5V
INA133UA
INA2133UA
(V+)
(V–)
(V+)
(V–)
✻
✻
±15
±0.92
IO = 0
MAX
UNITS
✻
✻
±1500
µV
µV/°C
✻
✻
✻
✻
✻
✻
±0.05
±0.001
–1.3
+0.8
–0.8
+0.3
±2.25
+4.5
TYP
±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 INA133U, INA2133U.
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 Voltage Range ........................................................................ 2 • VS
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.
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.
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
Single
INA133U
"
INA133UA
"
Dual
INA2133U
"
INA2133UA
"
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
INA133U
"
"
"
"
SO-8 Surface Mount
182
–40°C to +85°C
INA133UA
"
"
"
"
INA133U
INA133U/2K5
INA133UA
INA133UA/2K5
Rails
Tape and Reel
Rails
Tape and Reel
SO-14 Surface Mount
235
–40°C to +85°C
INA2133U
"
"
"
"
SO-14 Surface Mount
235
–40°C to +85°C
INA2133UA
"
"
"
"
INA2133U
INA2133U/2K5
INA2133UA
INA2133UA/2K5
Rails
Tape and Reel
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. (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 “INA133UA/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
INA133, INA2133
PIN CONFIGURATIONS
Top View
SO-8
Top View
SO-14
INA2133
INA133
1
Ref
8
NC
NC
1
–In A
2
14
Ref A
13
Out A
A
+In A
3
12
Sense A
Output
V–
4
11
V+
Sense
+In B
5
10
Sense B
–In
2
7
V+
+In
3
6
V–
4
5
B
–In B
6
9
Out B
NC
7
8
Ref B
NC = No Connection
NC = No Connection
®
INA133, INA2133
4
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
GAIN vs FREQUENCY
10
COMMON-MODE REJECTION vs FREQUENCY
Common-Mode Rejection (dB)
+25°C
0
Closed-Loop Gain (dB)
100
+125°C
–55°C
–10
–20
–30
–40
VS = ±15V or ±5V
90
80
70
60
50
VS = ±15V or ±5V
–50
40
10k
100k
1M
10M
100
1k
10k
Frequency (Hz)
1M
CHANNEL SEPARATION vs FREQUENCY
POWER SUPPLY REJECTION vs FREQUENCY
130
120
100
Channel Separation (dB)
Power Supply Rejection (dB)
100k
Frequency (Hz)
–PSRR
80
60
+PSRR
40
120
110
100
INA2133
90
20
1
10
100
1k
10k
100k
100
10k
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
40
100k
0.1
VS = ±15V
500kHz Filter
30
20
10
THD+N (%)
Common-Mode Voltage (V)
1k
Frequency (Hz)
0
–10
–20
0.01
VS = ±5V
–30
–40
0.001
–15
–10
–5
0
5
10
15
20
Output Voltage (V)
100
1k
10k
20k
Frequency (Hz)
®
5
INA133, INA2133
TYPICAL PERFORMANCE CURVES
(CONT)
At TA = +25°C, VS = ±15V, 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
1µV/div
Voltage Noise (nV/√Hz)
1000
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
0
Temperature (°C)
75
(V+)
VS = ±15V
VS = ±5V
100
125
–40°C
(V+) –5
Output Voltage (V)
+ISC
30
–ISC
25
+ISC
20
50
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
SHORT-CIRCUIT CURRENT vs TEMPERATURE
35
25
Temperature (°C)
40
Short-Circuit |mA|
Quiescent Current (µA)
1300
25°C
85°C
(V+) –10
0
85°C
(V–) +10
25°C
(V–) +5
–40°C
–ISC
15
–75
–50
–25
0
V–
25
50
75
100
0
125
®
INA133, INA2133
±5
±10
±15
±20
Output Current (mA)
Temperature (°C)
6
±25
±30
±35
TYPICAL PERFORMANCE CURVES
(CONT)
At TA = +25°C, VS = ±15V, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
VS = ±5V
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
VS = ±15V
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
VS = ±15V
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
VS = ±5V
60
Typical production
distribution of
packaged units.
Singles and duals
included.
40
35
30
25
20
15
10
1400
Typical production
distribution of
packaged units.
Singles and duals
included.
50
Percent of Units (%)
45
1200
800
Offset Voltage (µV)
1000
600
–1400
Offset Voltage (µV)
50
Percent of Units (%)
400
0
0
0
200
5
–900
–800
–700
–600
–500
–400
–300
–200
–100
0
100
200
300
400
500
600
700
800
900
5
–200
10
–400
10
15
–600
15
20
–800
20
–1000
25
Typical production
distribution of
packaged units.
Singles and duals
included.
25
Percent of Units (%)
30
Percent of Units (%)
30
Typical production
distribution of
packaged units.
Singles and duals
included.
–1200
35
40
30
20
10
5
0
0
0
1
2
3
4
5
6
7
8
9
10
0
Offset Voltage Drift (µV/°C)
4
5
6
7
8
9
10
SETTLING TIME vs LOAD CAPACITANCE
–Overshoot
VS = ±15V
VS = ±5V
12
Settling Time (µs)
+Overshoot
Overshoot (%)
3
14
VS = ±5V
VS = ±15V
50
2
Offset Voltage Drift (µV/°C)
SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE
60
1
40
–Overshoot
30
20
10
8
0.01%
6
4
+Overshoot
10
10V Step
0.1%
2
0
0
100
1k
10k
100
100k
1k
10k
Capacitive Load (pF)
Load Capacitance (pF)
®
7
INA133, INA2133
TYPICAL PERFORMANCE CURVES
(CONT)
At TA = +25°C, VS = ±15V, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
LARGE-SIGNAL STEP RESPONSE
SMALL-SIGNAL STEP RESPONSE
CL = 100pF
2V/div
100mV/div
CL = 1000pF
CL = 1000pF
2.5µs/div
2.5µs/div
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
Peak-to-Peak Output Voltage (V)
32
28
VS = ±15V
24
20
16
12
VS = ±5V
8
4
0
10k
100k
Frequency (Hz)
®
INA133, INA2133
8
1M
APPLICATIONS INFORMATION
changed, pins 2 and 5 must also be interchanged to maintain
proper ratio matching.
The INA133 and INA2133 are high-speed difference amplifiers suitable for a wide range of general purpose applications. Figure 1 shows the basic connections required for
operation of the INA133. Decoupling capacitors are strongly
recommended in 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.
OPERATING VOLTAGE
The INA133 and INA2133 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.
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 80dB (a 10Ω mismatch degrades CMR to
74dB). 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.
INPUT VOLTAGE
The INA133 and INA2133 can accurately measure differential signals that are above and below the supply rails. Linear
common-mode range extends from 2 • (V+)–3V to 2 • (V–)
+3V (nearly twice the supplies). See the typical performance
curve, “Input Common-Mode Voltage vs Output Voltage.”
OFFSET VOLTAGE TRIM
The INA133’s internal resistors are accurately ratio trimmed
to match. That is, R1 is trimmed to match R2 and R3 is
trimmed to match R4. 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 250Ω),
even if well matched, will degrade common-mode rejection.
The INA133 and INA2133 are laser trimmed for low offset
voltage and drift. Most applications require no external offset
adjustment. Figure 2 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 2. The source impedance of a signal applied
to the Ref terminal should be less than 10Ω to maintain good
common-mode rejection.
Circuit board layout constraints might suggest possible variations in connections of the internal resistors. For instance, it
appears that pins 1 and 3 could be interchanged. However,
because of the ratio trimming technique used (see paragraph
above) CMRR will be degraded. If pins 1 and 3 are inter-
INA133
V+
V–
1µF
1µF
2
V2
R1
R2
7
4
5
6
VO
INA133
–In
V2
2
R1
25kΩ
R2
25kΩ
10Ω
5
V3
3
R3
R4
6
+In
V3
3
R3
25kΩ
R4
25kΩ
1
+15V
VOUT = V3 – V2
Gain Error = ±0.01%
CMR = 90dB
Nonlinearity = ±0.0001%
V O = V3 – V 2
Offset Adjustment
Range = ±1mV
1
150kΩ
100kΩ
10Ω
–15V
FIGURE 1. Precision Difference Amplifier (Basic Power
Supply and Signal Connections).
FIGURE 2. Offset Adjustment.
®
9
INA133, INA2133
TYPICAL APPLICATIONS
V1
INA133
–In
V+
A1
V+
3
2
INA133
5
2
R2
5
6
R1
VO
R2
7
6
1
3
VO = (V+)/2
A2
V2
+In
VO = (1 + 2R2/R1) (V2 –V1)
Common
4
1
Common
The INA133 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.
FIGURE 5. Pseudoground Generator.
A1, A2
SIMILAR COMPLETE
BURR-BROWN IA
FEATURE
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
INA133
V2
2
5
6
FIGURE 3. Precision Instrumentation Amplifier.
VO = –V2
INA133
2
5
1
100Ω(1)
1%
6
V–
3
Gain Error = 0.05% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 1ppm/°C
V0
0 to 2V
100Ω(1)
1%
3
1
FIGURE 6. Precision Unity-Gain Inverting Amplifier.
IIN
0 to 20mA
NOTE: (1) Input series resistors should be less than
250Ω (1% max mismatch) to maintain excellent CMR.
With 100Ω resistors, gain error is increased to 0.5%.
FIGURE 4. Current Receiver with Compliance to Rails.
®
INA133, INA2133
10
INA133
INA133
2
5
2
5
6
VO = 2 • V1
1
6
V3
V1
VO =
3
V3
2
±0.05% max
3
1
Gain Error = 0.025% maximum
Gain Drift = 2ppm/°C
FIGURE 7. Precision Gain = 2 Amplifier.
FIGURE 8. Precision Gain = 1/2 Amplifier.
INA133
INA133
2
2
5
6
VO =
1
V1
6
(V1 + V3)
2
±0.05% max
V3
3
VO = V1 + V3
1
V1
±0.05% max
V3
5
3
FIGURE 9. Precision Average Value Amplifier.
FIGURE 10. Precision Summing Amplifier.
INA133
2
5
R1
R2
Output
6
(1)
1
2
5
INA133
3 Ref
Device
VFC320
VFC100
DAC80
DAC703
XTR110
Output
0-10kHz
0-FCLOCK/2
0-FS (12 bits)
0-FS (16 bits)
4-20mA
6
V1
V3
OPA277
Voltage
Source
1
3
(
Ref must be driven
by low impedance.
VO
VO = 1 +
R2
R1
)( V
1 + V3
2
)
For G = 10,
See INA143.
NOTE: (1) Unipolar Input Device.
FIGURE 11. Precision Bipolar Offsetting.
FIGURE 12. Precision Summing Amplifier with Gain.
®
11
INA133, INA2133
1
Noise (60Hz hum)
INA115
4
A1
2
Transducer or
Analog Signal
25kΩ
Feedback
12
3
25kΩ
25kΩ
A3
RG
11
14
25kΩ
G=1+
25kΩ
15
A2
25kΩ
5
Noise (60Hz hum)
100kΩ
Shield
13
V+
7
8
10
Ref
V–
3
INA133
2
5
6
1
FIGURE 13. Instrumentation Amplifier Guard Drive Generator.
1/2 INA2133
2
12
1/2 INA2133
3
V1
V2
A
6
13
14
V3
V4
10
B
5
8
FIGURE 14. Precision Summing Instrumentation Amplifier.
®
INA133, INA2133
12
Output
9
VO = V3 + V4 – V1 – V2
50kΩ
RG
INA133
1/2 INA2133
5
2
V2
R
12
2
6
R
V1
13
A
V1
1
3
V01
14
3
IO = (V1 – V2) (1/25k + 1/R)
Load
IO
V2
1/2 INA2133
FIGURE 15. Precision Voltage-to-Current Converter with
Differential Inputs.
6
10
INA133
V2
9
B
5
2
V02
8
5
6
R
V3
3
V01 – V02 = 2 (V2 – V1)
OPA131
1
FIGURE 18. Differential Output Difference Amplifier.
IO
Load
IO = (V3 – V2)/R
FIGURE 16. Differential Input Voltage-to-Current Converter for Low IOUT.
V2
2
INA133
5
6
INA133
V2
R (R ≥ 200Ω)
5
2
V3
3
1
Gate can be
+VCC –5V
R
6
R < 200Ω
R
V3
IO = (V3 – V2) (1/25k + 1/R)
IO =
Gate can be
+VS –5V
1
3
Load
(V3 – V2)
Load
IO
R
FIGURE 19. Isolating Current Source with Buffering Amplifier for Greater Accuracy.
IO
FIGURE 17. Isolating Current Source.
®
13
INA133, INA2133
+5V
7
VS
INA133
2
5
Transducer
or
Analog
Signal
6
0V-4V
Input
1
3
12 Bits
Out
ADS7806
4
–5V
Eliminates errors due to different grounds.
FIGURE 20. Differential Input Data Acquisition.
INA133
2
5
V1
DG188
6
VO
3
1
Logic
In
Logic In
VO
0
–V1
1
+V1
1
FIGURE 21. Digitally Controlled Gain of ±1 Amplifier.
INA133
2
D1
D2
OPA130
R3
R4
1
R5
2kΩ
FIGURE 22. Precision Absolute Value Buffer.
®
INA133, INA2133
R2
5
10pF
3
V1
Input
R1
14
6
V0 = |V1|
+15V
2
+10V Out
6
REF102
–In
INA133
2
5
BUF634 inside feedback
loop contributes no error.
INA133
2
5
–10V Out
6
BUF634
4
VO
6
1
+In
RL
1
3
3
FIGURE 23. ±10V Precision Voltage Reference.
FIGURE 24. High Output Current Precision Difference
Amplifier.
V+
0V to 10V
In
12.5kΩ
1kΩ
7
50kΩ
INA133
2
OPA227
+15V
V2
2
5
25kΩ
25kΩ
6
REF102
6
10V
For 4-20mA applications,
the REF102 sets the 4mA
low-scale output for 0V input.
R1
50.1Ω
2N3904
Set R1 = R2
V3
3
25kΩ
25kΩ
1
R2
50.1Ω
4
4
IO = 4 to 20mA
IO = V3 – V2
RLOAD
1
1
+
25kΩ R2
FIGURE 25. Precision Voltage-to-Current Conversion.
®
15
INA133, INA2133
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
INA133U
ACTIVE
SOIC
D
8
75
RoHS & Green
Call TI
Level-3-260C-168 HR
INA133U/2K5
ACTIVE
SOIC
D
8
2500
RoHS & Green
Call TI
INA133UA
ACTIVE
SOIC
D
8
75
RoHS & Green
INA133UA/2K5
ACTIVE
SOIC
D
8
2500
INA133UE4
ACTIVE
SOIC
D
8
INA2133U
ACTIVE
SOIC
D
INA2133UA
ACTIVE
SOIC
INA2133UE4
ACTIVE
SOIC
-40 to 85
INA
133U
Samples
Level-3-260C-168 HR
INA
133U
Samples
Call TI
Level-3-260C-168 HR
INA
133U
A
RoHS & Green
NIPDAU
Level-3-260C-168 HR
INA
133U
A
75
RoHS & Green
Call TI
Level-3-260C-168 HR
-40 to 85
INA
133U
Samples
14
50
RoHS & Green
Call TI
Level-3-260C-168 HR
-55 to 125
INA2133U
Samples
D
14
50
RoHS & Green
Call TI
Level-3-260C-168 HR
-55 to 125
INA2133U
A
Samples
D
14
50
RoHS & Green
Call TI
Level-3-260C-168 HR
-55 to 125
INA2133U
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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