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INA331 Datasheet(PDF) 1 Page - Texas Instruments |
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INA331 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 22 page INA331 INA2331 SBOS215C – DECEMBER 2001 – REVISED APRIL 2005 DESCRIPTION The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single- supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415 µA (dropping to 0.01 µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications. Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors. FEATURES q DESIGNED FOR LOW COST q HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/ °C q GAIN SET WITH EXT. RESISTORS FOR > 5V/V q LOW OFFSET VOLTAGE: ±250µV q HIGH CMRR: 94dB DC, 50dB at 45kHz q LOW BIAS CURRENT: 0.5pA q BANDWIDTH, SLEW RATE: 2.0MHz, 5V/ µs q RAIL-TO-RAIL OUTPUT SWING: (V+) – 0.02V q WIDE TEMPERATURE RANGE: –55 °C to +125°C q LOW QUIESCENT CURRENT: 490 µA max/chan q SHUT DOWN: 0.01 µA q MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES Copyright © 2001-2005, Texas Instruments Incorporated Low-Power, Single-Supply, CMOS INSTRUMENTATION AMPLIFIERS 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. APPLICATIONS q INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermocouple, 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 AUDIO AMPLIFIERS q COMMUNICATION SYSTEMS q TEST EQUIPMENT q AUTOMOTIVE INSTRUMENTATION The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies. High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of –55 °C to +125°C. A2 A1 A3 40k Ω V REF V IN– V IN+ 10k Ω 10k Ω Shutdown V+ V OUT G = 5 + (5R 2/R1) V– R 2 R 1 R G 40k Ω Ch A INA2331 INA331 Ch B ® INA2 331 INA3 31 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. www.ti.com All trademarks are the property of their respective owners. |
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