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INA322EA/250

Description
Precision Instrumentation Amplifier
Categoryaccessories   
File Size298KB,15 Pages
ManufacturerBurr-Brown
Websitehttp://www.burr-brown.com/
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INA322EA/250 Overview

Precision Instrumentation Amplifier

INA
322
®
INA322
INA2322
www.ti.com
microPower,
Single-Supply, CMOS
INSTRUMENTATION AMPLIFIER
FEATURES
q
LOW COST
q
LOW QUIESCENT CURRENT: 40µA/channel
Shut Down: < 1µA
q
HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C
q
GAIN SET WITH EXTERNAL RESISTORS
q
LOW BIAS CURRENT: 10pA
q
BANDWIDTH: 500kHz, G = 5V/V
q
RAIL-TO-RAIL OUTPUT SWING: (V+) – 0.02V
q
WIDE TEMPERATURE RANGE:
–55
°
C to +125
°
C
q
SINGLE VERSION IN MSOP-8 PACKAGE AND
DUAL VERSION IN TSSOP-14 PACKAGE
APPLICATIONS
q
INDUSTRIAL SENSOR AMPLIFIERS:
Bridge, RTD, Thermistor, Position
q
PHYSIOLOGICAL AMPLIFIERS:
ECG, EEG, EMG
q
A/D CONVERTER SIGNAL CONDITIONING
q
DIFFERENTIAL LINE RECEIVERS WITH GAIN
q
FIELD UTILITY METERS
q
PCMCIA CARDS
q
COMMUNICATION SYSTEMS
q
TEST EQUIPMENT
q
AUTOMOTIVE INSTRUMENTATION
DESCRIPTION
The INA322 family is a series of low cost, rail-to-rail
output, micropower CMOS instrumentation amplifiers
that offer wide-range, single-supply, as well as bipolar-
supply operation. The INA322 family provides low-
cost, low-noise amplification of differential signals with
micropower current consumption of 40µA. When shut-
down the INA322 has a quiescent current of less than
1µA. Returning to normal operations within nanosec-
onds, the shutdown feature makes the INA322 optimal
for low-power battery or multiplexing applications.
R
1
160kΩ
REF
A1
Configured internally for 5V/V gain, the INA322 offers
exceptional flexibility with user-programmable external
gain resistors. The INA322 reduces common-mode er-
ror over frequency and with CMRR remaining high up
to 3kHz, line noise and line harmonics are rejected.
The low-power design does not compromise on band-
width or slew rate, making the INA322 ideal for driving
sampling Analog-to-Digital (A/D) converters as well as
general-purpose applications. With high precision, low
cost, and small packaging, the INA322 outperforms dis-
crete designs, while offering reliability and performance.
RG
160kΩ
R
2
40kΩ
40kΩ
V
IN–
V
IN+
A3
A2
V
OUT
Gain = 5 + 5(R2/R1)
V
OUT
= (V
IN+
– V
IN–
) • Gain
Shutdown
V+
V–
Copyright © 2000, Texas Instruments Incorporated
SBOS174A
Printed in U.S.A. December, 2000

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