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INA322 Datasheet

  • INA322

  • microPower, Single-Supply, CMOS INSTRUMENTATION AMPLIFIER

  • 15頁

  • BB

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INA
322
廬
INA322
INA2322
www.ti.com
microPower,
Single-Supply, CMOS
INSTRUMENTATION AMPLIFIER
FEATURES
q
LOW COST
q
LOW QUIESCENT CURRENT: 40碌A(chǔ)/channel
Shut Down: < 1碌A(chǔ)
q
HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/擄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+) 鈥?0.02V
q
WIDE TEMPERATURE RANGE:
鈥?5
擄
C to +125
擄
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 40碌A(chǔ). When shut-
down the INA322 has a quiescent current of less than
1碌A(chǔ). Returning to normal operations within nanosec-
onds, the shutdown feature makes the INA322 optimal
for low-power battery or multiplexing applications.
R
1
160k鈩?/div>
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
160k鈩?/div>
R
2
40k鈩?/div>
40k鈩?/div>
V
IN鈥?/div>
V
IN+
A3
A2
V
OUT
Gain = 5 + 5(R2/R1)
V
OUT
= (V
IN+
鈥?V
IN鈥?/div>
) 鈥?Gain
Shutdown
V+
V鈥?/div>
Copyright 漏 2000, Texas Instruments Incorporated
SBOS174A
Printed in U.S.A. December, 2000

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