1999 Burr-Brown Corporation

PDS-1530A

Printed in U.S.A. June, 1999

FEATURES

DESIGNED FOR LOW COST

SINGLE, DUAL VERSIONS

LOW OFFSET VOLTAGE DRIFT:

450

V max,

C max

LOW GAIN ERROR: 0.05% max

WIDE BANDWIDTH: 1.5MHz

HIGH SLEW RATE: 5V/

FAST SETTLING TIME: 5.5

s to 0.01%

LOW QUIESCENT CURRENT: 950

WIDE SUPPLY RANGE:

2.25V to

18V

SO-8 and SO-14 PACKAGES

APPLICATIONS

DIFFERENTIAL INPUT AMPLIFIER
BUILDING BLOCK

DIFF IN / DIFF OUT AMPLIFIER

UNITY-GAIN INVERTING AMPLIFIER

GAIN = +1/2 OR G = +2 AMPLIFIER

SUMMING AMPLIFIER

SYNCHRONOUS DEMODULATOR

CURRENT/DIFFERENTIAL LINE RECEIVER

VOLTAGE-CONTROLLED CURRENT SOURCE

BATTERY POWERED SYSTEMS

LOW COST AUTOMOTIVE

DESCRIPTION

The INA133 and INA2133 are high slew rate, unity-
gain 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.

INA133

INA2133

High-Speed, Precision

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 INA133 and
INA2133 provide this precision circuit function without
using an expensive precision network.

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

Operation is from 55

C to +125

25k

Sense

INA133

Output

V+

Ref

+In

25k

Sense A

INA2133

Out A

V+

Ref A

In A

+In A

25k

Sense B

Out B

Ref B

In B

+In B

INA13

INA2133

For most current data sheet and other product

information, visit www.burr-brown.com

INA133, INA2133

INA133U

INA133UA

INA2133U

INA2133UA

SPECIFICATIONS: V

15V

At T

= +25

C, V

15V, R

= 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)

RTO

Initial

(1)

= 0V

150

450

900

vs Temperature

= 40

C to +85

See Typical Curve

vs Power Supply

2.25V to

18V

900

V/V

vs Time

0.3

Channel Separation (dual)

120

INPUT IMPEDANCE

(2)

Differential

Common-Mode

= 0V

INPUT VOLTAGE RANGE
Common-Mode Voltage Range

Positive

= 0V

2(V+) 3

2(V+) 2

Negative

= 0V

2(V) +3

2(V) +2

Common-Mode Rejection Ratio

= 27V to +27V, R

= 0

OUTPUT VOLTAGE NOISE

(3)

RTO

f = 0.1Hz to 10Hz

Vp-p

f = 10Hz

nV/

f = 100Hz

nV/

f = 1kHz

nV/

GAIN
Initial

V/V

Error

= 14V to +13.5V

0.02

0.05

0.1

vs Temperature

= 40

C to +85

ppm/

Nonlinearity

= 14V to +13.5V

0.0001

0.001

0.002

% of FS

OUTPUT
Voltage Output

Gain Error < 0.1%

Positive

= 10k

to Ground

(V+) 1.5

(V+)1.3

Negative

= 10k

to Ground

(V) +1

(V)+0.8

Positive

= 100k

to Ground

(V+)0.8

Negative

= 100k

to Ground

(V)+0.3

Current Limit, Continuous-to-Common

25 /+32

Capacitive Load (stable operation)

1000

FREQUENCY RESPONSE
Small-Signal Bandwidth

3dB

1.5

MHz

Slew Rate

Settling Time: 0.1%

10V Step, C

= 100pF

0.01%

10V Step, C

= 100pF

5.5

Overload Recovery Time

50% Overdrive

POWER SUPPLY
Rated Voltage

Operating Voltage Range

Dual Supplies

2.25

Single Supply

+4.5

+36

Quiescent Current (per amplifier)

= 0

0.95

1.2

TEMPERATURE RANGE
Specification

+85

Operation

+125

Storage

+125

Thermal Resistance

SO-8 Surface Mount

150

C/W

SO-14 Surface Mount

100

C/W

Specifications the same as INA133U, INA2133U.

NOTES: (1) Includes the effects of amplifier's input bias and offset currents. (2) 25k

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.

INA133, INA2133

INA133U

INA133UA

INA2133U

INA2133UA

SPECIFICATIONS: V

At T

= +25

C, V

5V, R

= 10k

connected to ground, and reference pin connected to ground, unless otherwise noted.

Supply Voltage, V+ to V .................................................................... 36V
Input Voltage Range ........................................................................ 2 · V

Output Short-Circuit (to ground)

(2)

.......................................... Continuous

Operating Temperature .................................................. 55

C to +125

Storage Temperature ..................................................... 55

C to +125

Junction Temperature .................................................................... +150

Lead Temperature (soldering, 10s) ............................................... +300

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
INA133U

SO-8 Surface Mount

182

C to +85

INA133U

Rails

INA133U/2K5

Tape and Reel

INA133UA

SO-8 Surface Mount

182

C to +85

INA133UA

Rails

INA133UA/2K5

Tape and Reel

Dual
INA2133U

SO-14 Surface Mount

235

C to +85

INA2133U

Rails

INA2133U/2K5

Tape and Reel

INA2133UA

SO-14 Surface Mount

235

C to +85

INA2133UA

Rails

INA2133UA/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 "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.

PACKAGE/ORDERING INFORMATION

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

OFFSET VOLTAGE

(1)

RTO

Initial

(1)

= 0V

300

750

1500

vs Temperature

INPUT VOLTAGE RANGE
Common-Mode Voltage Range

Positive

= 0V

2(V+) 3

2(V+) 2

Negative

= 0V

2(V) + 3

2(V) + 2

Common-Mode Rejection Ratio

= 7V to +7V, R

= 0

GAIN
Initial

V/V

Gain Error

= 4V to 3.5V

0.02

0.05

0.1

Nonlinearity

= 4V to 3.5V

0.0001

0.001

0.002

% of FS

OUTPUT
Voltage Output

Gain Error < 0.1%

Positive

= 10k

to Ground

(V+) 1.5

(V+) 1.3

Negative

= 10k

to Ground

(V) +1

(V) +0.8

Positive

= 100k

to Ground

(V+) 0.8

Negative

= 100k

to Ground

(V) +0.3

POWER SUPPLY
Rated Voltage

Operating Voltage Range

Dual Supplies

2.25

Single Supply

+4.5

+36

Quiescent Current (per amplifier)

= 0

0.92

1.2

Specifications the same as INA133U, INA2133U.

NOTES: (1) Includes the effects of amplifier's input bias and offset currents.

INA133, INA2133

TYPICAL PERFORMANCE CURVES

At T

= +25

C, V

15V, R

= 10k

connected to ground, and reference pin connected to ground, unless otherwise noted.

GAIN vs FREQUENCY

Frequency (Hz)

Closed-Loop Gain (dB)

10k

100k

10M

15V or

+125

+25

COMMON-MODE REJECTION vs FREQUENCY

Frequency (Hz)

Common-Mode Rejection (dB)

100

100k

10k

100

15V or

POWER SUPPLY REJECTION vs FREQUENCY

Frequency (Hz)

Power Supply Rejection (dB)

100

10k

100k

120

100

PSRR

+PSRR

CHANNEL SEPARATION vs FREQUENCY

Channel Separation (dB)

Frequency (Hz)

130

120

110

100

10k

100k

INA2133

INPUT COMMON-MODE VOLTAGE

vs OUTPUT VOLTAGE

Output Voltage (V)

Common-Mode Voltage (V)

15V

TOTAL HARMONIC DISTORTION+NOISE

vs FREQUENCY

Frequency (Hz)

THD+N (%)

10k

100

20k

0.1

0.01

0.001

500kHz Filter

INA133, INA2133

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

15V, R

= 10k

connected to ground, and reference pin connected to ground, unless otherwise noted.

VOLTAGE NOISE DENSITY vs FREQUENCY

Frequency (Hz)

Voltage Noise (nV/

Hz)

100

10k

1000

100

QUIESCENT CURRENT vs TEMPERATURE

Temperature (

Quiescent Current (

100

125

1400

1300

1200

1100

1000

900

800

700

Per Amplifier

SLEW RATE vs TEMPERATURE

Temperature (

Slew Rate (V/

100

125

+SR

15V

SHORT-CIRCUIT CURRENT vs TEMPERATURE

Temperature (

Short-Circuit |mA|

100

125

15V

OUTPUT VOLTAGE SWING vs OUTPUT CURRENT

Output Current (mA)

Output Voltage (V)

(V+)

(V+) 5

(V+) 10

(V) +10

(V) +5

0.1Hz TO 10Hz PEAK-TO-PEAK

VOLTAGE NOISE

500

s/div

V/div

INA133, INA2133

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

15V, R

= 10k

connected to ground, and reference pin connected to ground, unless otherwise noted.

OFFSET VOLTAGE PRODUCTION DISTRIBUTION

15V

Percent of Units (%)

Offset Voltage (

900

800

700

600

500

400

300

200

100

200

300

400

500

600

700

800

900

Typical production
distribution of
packaged units.
Singles and duals
included.

OFFSET VOLTAGE PRODUCTION DISTRIBUTION

Percent of Units (%)

Offset Voltage (

1400

1200

1000

800

600

400

200

400

600

800

1000

1200

1400

Typical production
distribution of
packaged units.
Singles and duals
included.

OFFSET VOLTAGE DRIFT

PRODUCTION DISTRIBUTION

15V

Percent of Units (%)

Offset Voltage Drift (

Typical production
distribution of
packaged units.
Singles and duals
included.

OFFSET VOLTAGE DRIFT

PRODUCTION DISTRIBUTION

Percent of Units (%)

Offset Voltage Drift (

Typical production
distribution of
packaged units.
Singles and duals
included.

SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE

Overshoot (%)

Load Capacitance (pF)

100

10k

100k

15V

+Overshoot

Overshoot

+Overshoot

SETTLING TIME vs LOAD CAPACITANCE

Capacitive Load (pF)

Settling Time (

100

10k

15V

10V Step

0.1%

0.01%

INA133, INA2133

APPLICATIONS INFORMATION

The INA133 and INA2133 are high-speed difference ampli-
fiers suitable for a wide range of general purpose applica-
tions. 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.

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 80dB (a 10

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.

The INA133's internal resistors are accurately ratio trimmed
to match. That is, R

is trimmed to match R

and R

trimmed to match R

. However, the absolute values may not

be equal (R

+ R

may be slightly different than R

+ R

Thus, large series resistors on the input (greater than 250

even if well matched, will degrade common-mode rejection.

Circuit board layout constraints might suggest possible varia-
tions 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-

changed, pins 2 and 5 must also be interchanged to maintain
proper ratio matching.

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

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.

INPUT VOLTAGE

The INA133 and INA2133 can accurately measure differen-
tial 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 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 10

to maintain good

common-mode rejection.

INA133

OUT

= V

Gain Error =

0.01%

CMR = 90dB
Nonlinearity =

0.0001%

25k

+In

V+

FIGURE 1. Precision Difference Amplifier (Basic Power

Supply and Signal Connections).

INA133

= V

Offset Adjustment
Range =

1mV

150k

100k

+15V

15V

FIGURE 2. Offset Adjustment.

INA133, INA2133

TYPICAL APPLICATIONS

INA133

+In

= (1 + 2R

) (V

)

FIGURE 3. Precision Instrumentation Amplifier.

SIMILAR COMPLETE

, A

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 INA133 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.

100

(1)

INA133

100

(1)

0 to 2V

0 to 20mA

NOTE: (1) Input series resistors should be less than
250

(1% max mismatch) to maintain excellent CMR.

With 100

resistors, gain error is increased to 0.5%.

FIGURE 4. Current Receiver with Compliance to Rails.

= (V+)/2

INA133

V+

Common

= V

INA133

Gain Error = 0.05% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 1ppm/

FIGURE 5. Pseudoground Generator.

FIGURE 6. Precision Unity-Gain Inverting Amplifier.

INA133, INA2133

= 2 ·

INA133

Gain Error = 0.025% maximum
Gain Drift = 2ppm/

INA133

0.05% max

+ V

)

0.05% max

INA133

= V

+ V

0.05% max

INA133

3 Ref

Output

INA133

Voltage

Source

(1)

Device
VFC320
VFC100
DAC80
DAC703
XTR110

Output
0-10kHz
0-F

CLOCK

0-FS (12 bits)
0-FS (16 bits)
4-20mA

Ref must be driven
by low impedance.

NOTE: (1) Unipolar Input Device.

OPA277

INA133

= 1 +

( )( )

For G = 10,

See INA143.

FIGURE 7. Precision Gain = 2 Amplifier.

FIGURE 8. Precision Gain = 1/2 Amplifier.

FIGURE 9. Precision Average Value Amplifier.

FIGURE 10. Precision Summing Amplifier.

FIGURE 11. Precision Bipolar Offsetting.

FIGURE 12. Precision Summing Amplifier with Gain.

INA133, INA2133

FIGURE 15. Precision Voltage-to-Current Converter with

Differential Inputs.

INA133

Load

= (V

) (1/25k + 1/R)

INA133

Load

= (V

)/R

OPA131

FIGURE 16. Differential Input Voltage-to-Current Con-

verter for Low I

OUT

INA133

Load

Gate can be

= (V

) (1/25k + 1/R)

200

1/2 INA2133

= 2 (V

)

INA133

Load

Gate can be

)

200

)

FIGURE 17. Isolating Current Source.

FIGURE 18. Differential Output Difference Amplifier.

FIGURE 19. Isolating Current Source with Buffering Am-

plifier for Greater Accuracy.

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