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AD8237ARMZ-R7 Datasheet(PDF) 1 Page - Analog Devices |
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AD8237ARMZ-R7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 29 page Micropower, Zero Drift, True Rail-to-Rail Instrumentation Amplifier Data Sheet AD8237 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved. FEATURES Gain set with 2 external resistors Can achieve low gain drift at all gains Ideal for battery powered instruments Supply current: 115 µA Rail-to-rail input and output Zero input crossover distortion Designed for excellent dc performance Minimum CMRR: 106 dB Maximum offset voltage drift: 0.3 µV/°C Maximum gain error: 0.005% (all gains) Maximum gain drift: 0.5 ppm/°C (all gains) Input bias current: 1 nA guaranteed to 125°C Bandwidth mode pin (BW) to adjust compensation 8 kV HBM ESD rating RFI filter on-chip Single-supply operation: 1.8 V to 5.5 V 8-lead MSOP package APPLICATIONS Bridge amplification Pressure measurement Medical instrumentation Thermocouple interface Portable systems Current measurement PIN CONFIGURATION BW 1 +IN 2 –IN 3 –VS 4 VOUT 8 FB 7 REF 6 +VS 5 AD8237 TOP VIEW (Not to Scale) + – – + Figure 1. Table 1. Instrumentation Amplifiers by Category1 General Purpose Zero Drift Military Grade Micropower Digital Gain AD8421 AD8237 AD620 AD8237 AD8250 AD8221/AD8222 AD8231 AD621 AD8420 AD8251 AD8220/AD8224 AD8293 AD524 AD8235/AD8236 AD8253 AD8228 AD8553 AD526 AD627 AD8231 AD8295 AD8556 AD624 AD8226 AD8557 1 See www.analog.com for the latest instrumentation amplifiers. GENERAL DESCRIPTION The AD8237 is a micropower, zero drift, rail-to-rail input and output instrumentation amplifier. The relative match of two resistors sets any gain from 1 to 1000. The AD8237 has excellent gain accuracy performance that can be preserved at any gain with two ratio-matched resistors. The AD8237 employs the indirect current feedback architecture to achieve a true rail-to-rail capability. Unlike conventional in-amps, the AD8237 can fully amplify signals with common-mode voltage at or even slightly beyond its supplies. This enables applications with high common-mode voltages to use smaller supplies and save power. The AD8237 is an excellent choice for portable systems. With a minimum supply voltage of 1.8 V, a 115 µA typical supply current, and wide input range, the AD8237 makes full use of a limited power budget, yet offers bandwidth and drift performance suitable for bench-top systems. The AD8237 is available in an 8-lead MSOP package. Performance is specified over the full temperature range of −40°C to +125°C. 6 5 4 3 2 1 –1 0 0 1 2 3 4 5 OUTPUT VOLTAGE (V) TRADITIONAL IN-AMP (RAIL-TO-RAIL OUT) AD8237 G = 100 VS = 5V VREF = 2.5V Figure 2. Input Common-Mode Voltage vs. Output Voltage, +VS =5 V, G = 100 |
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