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AD622 Datasheet(PDF) 1 Page - Analog Devices |
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AD622 Datasheet(HTML) 1 Page - Analog Devices |
1 / 17 page Low Cost Instrumentation Amplifier Data Sheet AD622 Rev. E 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 ©1996–2012 Analog Devices, Inc. All rights reserved. FEATURES Easy to use Low cost solution Higher performance than two or three op amp design Unity gain with no external resistor Optional gains with one external resistor (Gain range: 2 to 1000) Wide power supply range: ±2.6 V to ±15 V Available in 8-lead PDIP and 8-lead SOIC_N packages Low power, 1.5 mA maximum supply current DC performance 0.15% gain accuracy: G = 1 125 µV maximum input offset voltage 1.0 µV/°C maximum input offset drift 5 nA maximum input bias current 66 dB minimum common-mode rejection ratio: G = 1 Noise 12 nV/√Hz @ 1 kHz input voltage noise 0.60 µV p-p noise: 0.1 Hz to 10 Hz, G = 10 AC characteristics 800 kHz bandwidth: G = 10 10 µs settling time to 0.1% @ G = 1 to 100 1.2 V/µs slew rate APPLICATIONS Transducer interface Low cost thermocouple amplifier Industrial process controls Difference amplifier Low cost data acquisition PIN CONFIGURATION RG 1 –IN 2 +IN 3 –VS 4 RG 8 +VS 7 OUTPUT 6 REF 5 AD622 Figure 1. 8-Lead PDIP and 8-Lead SOIC_N (N and R Suffixes) GENERAL DESCRIPTION The AD622 is a low cost, moderately accurate instrumentation amplifier in the traditional pin configuration that requires only one external resistor to set any gain between 2 and 1000. For a gain of 1, no external resistor is required. The AD622 is a complete difference or subtractor amplifier system that also provides superior linearity and common-mode rejection by incorporating precision laser-trimmed resistors. The AD622 replaces low cost, discrete, two or three op amp instrumentation amplifier designs and offers good common- mode rejection, superior linearity, temperature stability, reliability, power, and board area consumption. The low cost of the AD622 eliminates the need to design discrete instrumentation amplifiers to meet stringent cost targets. While providing a lower cost solution, it also provides performance and space improvements. Table 1. Next Generation Upgrades for AD622 Part Comment AD8221 Better specs at lower price AD8222 Dual channel or differential out AD8226 Low power, wide input range AD8220 JFET input AD8228 Best gain accuracy AD8295 +2 precision op amps or differential out AD8421 Low noise, better specs |
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