INA322 Datasheet, PDF (1/15 Pages) Burr-Brown (TI) – microPower, Single-Supply, CMOS INSTRUMENTATION AMPLIFIER

INA322
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
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.
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
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.
R₁
RG
R₂
REF
160kΩ 40kΩ
40kΩ
160kΩ
A1
V_IN–
V_IN+
A3
A2
Gain = 5 + 5(R2/R1)
V_OUT = (V_IN+ – V_IN–) • Gain
V_OUT
Shutdown
V+
V–
Copyright © 2000, Texas Instruments Incorporated
SBOS174A
Printed in U.S.A. December, 2000