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INA321 Datasheet(PDF) 1 Page - Texas Instruments |
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INA321 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 18 page ![]() FEATURES D LOW QUIESCENT CURRENT: 40µA/channel Shut Down: < 1 µA D HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/ °C D GAIN SET WITH EXTERNAL RESISTORS D LOW OFFSET VOLTAGE: ±200µV D HIGH CMRR: 94dB D LOW BIAS CURRENT: 10pA D BANDWIDTH: 500kHz, G = 5V/V D RAIL-TO-RAIL OUTPUT SWING: (V+) − 0.02V D WIDE TEMPERATURE RANGE: −55 °C to +125°C D SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGE DESCRIPTION The INA321 family is a series of rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, single-supply, as well as bipolar-supply operation. The INA321 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40 µA. When shutdown, the INA321 has a quiescent current of less than 1 µA. Returning to normal operations within nanoseconds, the shutdown feature makes the INA321 optimal for low-power battery or multiplexing applications. Configured internally for 5V/V gain, the INA321 offers exceptional flexibility with user-programmable external gain resistors. The INA321 reduces common-mode error 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 bandwidth or slew rate, making the INA321 ideal for driving sample Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA321 outperforms discrete designs, while offering reliability and performance. APPLICATIONS D INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position D PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG D A/D CONVERTER SIGNAL CONDITIONING D DIFFERENTIAL LINE RECEIVERS WITH GAIN D FIELD UTILITY METERS D PCMCIA CARDS D COMMUNICATION SYSTEMS D TEST EQUIPMENT D AUTOMOTIVE INSTRUMENTATION CMRR vs FREQUENCY Frequency (Hz) 1k 10 100 10k 120 100 80 60 40 INA321 Nearest Competition 10x Im provement A2 A1 A3 160k Ω REF VIN− VIN+ 40k Ω 40k Ω Shutdown V+ VOUT VOUT =(VIN+ − VIN−) • Gain Gain =5 +5(R2/R1) V − R2 R1 RG 160k Ω INA321 INA2321 SBOS168B − DECEMBER 2000 − REVISED JULY 2004 microPower, Single-Supply, CMOS Instrumentation Amplifier www.ti.com Copyright 2000-2004, Texas Instruments Incorporated 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. All trademarks are the property of their respective owners. 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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