INA322EA Datasheet, PDF (1/21 Pages) Texas Instruments – microPower, Single-Supply, CMOS NTATION AMPLIFIER

INA322
INA322 ®
INA2322
SBOS174B – DECEMBER 2000 – REVISED FEBRUARY 2006
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 shutdown the INA322 has a quiescent current
of less than 1µA. Returning to normal operations within
microseconds, the shutdown feature makes the INA322
optimal for low-power battery or multiplexing applications.
R₁
Configured internally for 5V/V gain, the INA322 offers excep-
tional flexibility with user-programmable external gain resis-
tors. The INA322 reduces common-mode error over fre-
quency and with CMRR remaining high up to 3kHz, line noise
and line harmonics are rejected.
The low-power design does not compromise on bandwidth or
slew rate, making the INA322 ideal for driving sampling Ana-
log-to-Digital (A/D) converters as well as general-purpose
applications. With high precision, low cost, and small packag-
ing, the INA322 outperforms discrete designs, while offering
reliability and performance.
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–
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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.
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