Burr Brown INA146UA-2K5, INA146UA Datasheet

1

®

INA146

®

INA146

©1999 Burr-Brown Corporation PDS-1491A Printed in U.S.A. September, 1999

High-Voltage, Programmable Gain

DIFFERENCE AMPLIFIER

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For most current data sheet and other product

information, visit www.burr-brown.com

INA146

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 ex­tends beyond both supply rails, making the INA146
well-suited for both single and dual supply applica­tions.

On-chip precision resistors are laser-trimmed to achieve
accurate gain and high common-mode rejection. Ex­cellent TCR tracking of these resistors assures contin­ued 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 affect­ing the common-mode input range.

The INA146 is available in the SO-8 surface-mount
package specified for the extended industrial tempera­ture range, –40°C to +85°C.

FEATURES

● HIGH COMMON-MODE VOLTAGE:

+40V at VS = +5V

±100V at V

S

= ±15V

● DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:

Set with External Resistors

● LOW QUIESCENT CURRENT: 570µA

● WIDE SUPPLY RANGE:

Single Supply: 4.5V to 36V
Dual Supplies: ±2.25V to ±18V

● LOW GAIN ERROR: 0.025%

● HIGH CMR: 80dB

● SO-8 PACKAGE

APPLICATIONS

● CURRENT SHUNT MEASUREMENTS

● SENSOR AMPLIFIER

● SYNCHRONOUS DEMODULATOR

●

CURRENT AND DIFFERENTIAL LINE
RECEIVER

● VOLTAGE-CONTROLLED CURRENT

SOURCE

● BATTERY POWERED SYSTEMS

● LOW COST AUTOMOTIVE

INSTRUMENTATION

R

5

10kΩ

(1%)

A1

V

IN

INA146

V

O

R

2

10kΩ

R

1

100kΩ

V

IN

R

3

100kΩ

R

4

10kΩ

R

G1

R

G2

A2

V

01

RefV–

V+

G = 0.1

+

–

2

5

7

418

6

3

V

O

= (VIN – VIN) 0.1 (1 + RG2/RG1)

+–

2

®

INA146

SPECIFICATIONS: VS = ±2.25V to ±18V Dual Supplies

At TA = +25°C, G = 0.1, RL = 10kΩ connected to ground and ref pin connected to ground unless otherwise noted.

Boldface limits apply over the specified temperature range, T

A

= –40°C to +85°C.

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.

INA146UA
PARAMETER CONDITION MIN TYP MAX UNITS
OFFSET VOLTAGE, V

O

RTI

(1, 2)

Input Offset Voltage V

OS

VS = ±15, V

CM

= VO = 0V ±1 ±5mV

vs Temperature ∆V

OS

/∆T See Typical Curve

vs Power Supply PSRR V

S

= ±1.35V to ±18V ±100 ±600 µV/V
vs Time ±3 µV/mo
Offset Voltage, V

01

RTI

(1, 2)

±1mV

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V

CM

(VIN+) – (VIN–) = 0V, VO = 0V ±100

(3)

V

Common-Mode Rejection CMRR V

CM

= 11 (V–) to 11 (V+) = 11, RS = 0Ω 70 80 dB

Over Temperature 64 74 dB

INPUT BIAS CURRENT

(2)

VCM = VS/2

Bias Current I

B

±50 nA

Offset Current I

OS

±5nA

INPUT IMPEDANCE

Differential (non-inverting input) 110 kΩ
Differential (inverting input) 91.7 kΩ
Common-Mode 55 kΩ

NOISE RTI

(1, 4)

Voltage Noise, f = 0.1Hz to 10Hz 10 µVp-p
Voltage Noise Density, f = 1kHz e

n

550 nV/√Hz

GAIN

G = 0.1 to 100
Gain Equation G = 0.1 • (1 + RG2/RG1)V/V
Initial

(1)

0.1 V/ V

Gain Error R

L

= 100kΩ, VO = (V–)+0.15 to (V+)–1, G = 1 ±0.025 ±0.1 %

vs Temperature R

L

= 100kΩ, VO = (V–)+0.25 to (V+)–1, G = 1 ±1 ±10 ppm/°C

R

L

= 10kΩ, VO = (V–)+0.3 to (V+)–1.25, G = 1 ±0.025 ±0.1 %

vs Temperature R

L

= 10kΩ, VO = (V–)+0.5 to (V+)–1.25, G = 1 ±1 ±10 ppm/°C

Nonlinearity V

O

= (V–)+0.3 to (V+)–1.25, G = 1 ±0.001 ±0.01 % of FS

FREQUENCY RESPONSE

Small Signal Bandwidth G = 0.1 550 kHz

G = 1 50 kHz
Slew Rate 0.45 V/µs
Settling Time, 0.1% G = 1, 10V Step 40 µs

0.01% G = 1, 10V Step 80 µs

Overload Recovery 50% Input Overload 40 µs

OUTPUT, V

O

Voltage Output RL = 100kΩ, G = 1 (V–) + 0.15 (V+) – 1 V

Over Temperature R

L

= 100kΩ, G = 1 (V–) + 0.25 (V+) – 1 V

R

L

= 10kΩ, G = 1 (V–) + 0.3 (V+) – 1.25 V

Over Temperature R

L

= 10kΩ, G = 1 (V–) + 0.5 (V+) – 1.25 V

Short-Circuit Current Continuous to Common ±15 mA
Capacitive Load Stable Operation 1000 pF

POWER SUPPLY

Specified Voltage Range, Dual Supplies ±2.25 ±18 V
Operating Voltage Range ±1.35 ±18 V
Quiescent Current V

IN

= 0, IO = 0 ±570 ±700 µA

Over Temperature

±750 µA

TEMPERATURE RANGE

Specified Range –40 +85 °C
Operating Range –55 +125 °C
Storage Range –55 +125 °C
Thermal Resistance

θ

JA

150 °C/W

NOTES: (1) Overall difference amplifier configuration. Referred to input pins (V

IN

+ and VIN–), gain = 0.1V/V. Specified with 10kΩ in 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.

3

®

INA146

SPECIFICATIONS: VS = +5V Single Supply

At TA = +25°C, G = 1, RL = 10kΩ connected to VS/2 and Ref pin connected to VS/2 unless otherwise noted.

Boldface limits apply over the specified temperature range, T

A

= –40°C to +85°C.

INA146UA
PARAMETER CONDITION MIN TYP MAX UNITS
OFFSET VOLTAGE, V

O

RTI

(1, 2)

Input Offset Voltage V

OS

V

CM

= VO = 0V ±3 ±10 mV

vs Temperature ∆V

OS

/∆T See Typical Curve

vs Power Supply Rejection Ratio PSRR V

S

= ±1.35V to ±18V ±100 ±600 µV/°C

vs Time ±3 µV/mo

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V

CM

VIN+ – VIN– = 0V, VO = 0V –25 19 V

Common-Mode Rejection Ratio CMRR V

CM

= –25V to +19V, RS = 0Ω 70 80 dB

Over Temperature 64 74 dB

INPUT BIAS CURRENT

(2)

Bias Current I

B

±50 nA

Offset Current I

OS

±5nA

INPUT IMPEDANCE

Differential (non-inverting input) 110 kΩ
Differential (inverting input) 91.7 kΩ
Common-Mode 55 kΩ

NOISE RTI

(1, 3, 4)

Voltage Noise, f = 0.1Hz to 10Hz 10 µVp-p
Voltage Noise Density, f = 1kHz e

n

550 nV/√Hz

GAIN

G = 0.1 to 100

V/V

Gain Equation G = 0.1 • (1 + R

G2/RG1

)V/V

Initial

(1)

0.1 V/ V

Gain Error R

L

= 100kΩ, VO = 0.15V to 4V, G = 1 ±0.025 ±0.1 %

vs Temperature R

L

= 100kΩ, VO = 0.25V to 4V, G = 1 ±1 ±10 ppm /°C

R

L

= 10kΩ, VO = 0.3V to 3.75V, G = 1 ±0.025 ±0.1 %

vs Temperature R

L

= 10kΩ, VO = 0.5V to 3.75V, G = 1 ±1 ±10 ppm /°C

Nonlinearity V

O

= +0.3 to +3.75, G = 1 ±0.001 ±0.01 % of FS

FREQUENCY RESPONSE

Small Signal Bandwidth G = 0.1 550 kHz

G = 1 50 kHz
Slew Rate 0.45 V/µs
Settling Time, 0.1% G = 1, 10V Step 40 µs

0.01% G = 1, 10V Step 80 µs

Overload Recovery 50% Input Overload 40 µs

OUTPUT, V

O

Voltage Output RL = 100kΩ, G = 1 0.15 4 V

Over Temperature R

L

= 100kΩ, G = 1 0.25 4 V

R

L

= 10kΩ, G = 1 0.3 3.75 V

Over Temperature R

L

= 10kΩ, G = 1 0.5 3.75 V

Short-Circuit Current Continuous to Common ±15 mA
Capacitive Load Stable Operation 1000 pF

POWER SUPPLY

Voltage Range, Dual Supplies ±2.25 ±18 V
Voltage Range, Single Supply ±4.5 ±36 V
Quiescent Current V

IN

= 0, IO = 0 ±570 ±700 µA

Over Temperature

±750 µA

TEMPERATURE RANGE

Specified Range –40 +85 °C
Operating Range –55 +125 °C
Storage Range –55 +125 °C
Thermal Resistance

θ

JA

150 °C/W

NOTES: (1) Overall difference amplifier configuration. Referred to input pins (V

IN

+ and VIN–), gain = 0.1V/V. Specified with 10kΩ in 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.

4

®

INA146

AMPLIFIER A1, A2 PERFORMANCE

At TA = +25°C, G = 0.1, RL = 10kΩ connected to ground and Ref pin, unless otherwise noted.

Boldface limits apply over the specified temperature range, T

A

= –40°C to +85°C.

PIN CONFIGURATION

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.

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.

ABSOLUTE MAXIMUM RATINGS

(1)

Top View SO-8

PACKAGE SPECIFIED
DRAWING TEMPERATURE PACKAGE ORDERING TRANSPORT

PRODUCT PACKAGE NUMBER(1) RANGE MARKING NUMBER(2) MEDIA

INA146UA SO-8 182 –40°C to +85°C INA146UA INA146UA Rails

" " " " " INA146UA/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, 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.

PACKAGE/ORDERING INFORMATION

INA146UA
PARAMETER CONDITION MIN TYP MAX UNITS
OFFSET VOLTAGE, V

O

RTI

(1, 2)

Input Offset Voltage V

OS

VS = ±15V, V

CM

= VO = 0V ±0.5 mV

vs Temperature ∆V

OS

/∆TT

A

= –40°C to +85°C ±1 µV/°C

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V

CM

VIN+ – VIN– = 0V, VO = 0V (V–) to (V+) –1 V

Common-Mode Rejection Ratio CMRR V

CM

= (V–) to (V+) –1 90 dB

OPEN-LOOP GAIN

Open Loop Gain A

OL

110 dB

INPUT BIAS CURRENT

(2)

Bias Current I

B

±50 nA

Offset Current I

OS

±5nA

RESISTOR AT A1 OUTPUT, V

O1

Initial 10 kΩ
Error ±1%
Temperature Drift Coefficient ±100 ppm/°C

Ref

V

IN

V

IN

V–

–

+

V

O1

V+
V

O

R

G

1
2
3
4

8
7
6
5