INA326

INA327

SBOS222D – NOVEMBER 2001 – REVISED NOVEMBER 2004

www.ti.com

DESCRIPTION

The INA326 and INA327 (with shutdown) are high-perfor-

mance, low-cost, precision instrumentation amplifiers with

rail-to-rail input and output. They are true single-supply

instrumentation amplifiers with very low DC errors and input

common-mode ranges that extends beyond the positive and

negative rails. These features make them suitable for appli-

cations ranging from general-purpose to high-accuracy.

Excellent long-term stability and very low 1/f noise assure

low offset voltage and drift throughout the life of the product.

The INA326 (without shutdown) comes in the MSOP-8 pack-

age. The INA327 (with shutdown) is offered in an MSOP-10.

Both are specified over the industrial temperature range,

–40

°C to +85°C, with operation from –40°C to +125°C.

FEATURES

q PRECISION

LOW OFFSET: 100

µV (max)

LOW OFFSET DRIFT: 0.4

µV/°C (max)

EXCELLENT LONG-TERM STABILITY

VERY-LOW 1/f NOISE

q TRUE RAIL-TO-RAIL I/O

INPUT COMMON-MODE RANGE:

20mV Below Negative Rail to 100mV Above

Positive Rail

WIDE OUTPUT SWING: Within 10mV of Rails

SUPPLY RANGE: Single +2.7V to +5.5V

q SMALL SIZE

microPACKAGE: MSOP-8, MSOP-10

q LOW COST

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 2001-2004, Texas Instruments Incorporated

Precision, Rail-to-Rail I/O

INSTRUMENTATION AMPLIFIER

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

APPLICATIONS

q LOW-LEVEL TRANSDUCER AMPLIFIER FOR

BRIDGES, LOAD CELLS, THERMOCOUPLES

q WIDE DYNAMIC RANGE SENSOR

MEASUREMENTS

q HIGH-RESOLUTION TEST SYSTEMS

q WEIGH SCALES

q MULTI-CHANNEL DATA ACQUISITION

SYSTEMS

q MEDICAL INSTRUMENTATION

q GENERAL-PURPOSE

INA326 AND INA327 RELATED PRODUCTS

PRODUCT

FEATURES

INA337

Precision, 0.4

µV/°C Drift, Specified –40°C to +125°C

INA114

50

µV V

OS, 0.5nA IB, 115dB CMR, 3mA IQ, 0.25µV/°C Drift

INA118

50

µV V

OS, 1nA IB, 120dB CMR, 385µA IQ, 0.5µV/°C Drift

INA122

250

µV V

OS, –10nA IB, 85µA IQ, Rail-to-Rail Output, 3µV/°C Drift

INA128

50

µV V

OS, 2nA IB, 125dB CMR, 750µA IQ, 0.5µV/°C Drift

INA321

500

µV V

OS, 0.5pA IB, 94dB CMRR, 60µA IQ, Rail-to-Rail Output

INA326

R

1

R

2

C

2

V

IN

−

V

IN+

7

V+

4

V

−

V

O

5

6

2

1

8

3

G = 2(R

2/R1)

INA32

7

INA3

26