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AD8420BRMZ-RL Datenblatt(PDF) 1 Page - Analog Devices |
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AD8420BRMZ-RL Datenblatt(HTML) 1 Page - Analog Devices |
1 / 10 page Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier Preliminary Technical Data AD8420 Rev. PrD 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 ©2011 Analog Devices, Inc. All rights reserved. FEATURES Gain set with 2 external resistors Gain range: 1 to 1000 Input voltage goes below ground Very wide power supply range Single supply: 2.7V to 36V Dual supply: +/-2.7V to+/-18V Bandwidth (G=100): 2.5 kHz Input noise: 50 nV/√Hz Max supply current: 90 µA Max offset voltage: 200 uV Max differential input voltage: 1V Min CMRR: 100 dB MSOP-8 package APPLICATIONS Bridge amplifiers Pressure Measurement Medical instrumentation Portable data acquisition Multichannel systems PIN CONFIGURATION TOP VIEW (Not to Scale) –IN 1 NC 2 3 +IN 4 +VS 8 VOUT 7 REF 6 –VS 5 AD8420 FB Figure 1. Table 1. Instrumentation Amplifiers by Category1 General Purpose Zero Drift Military Grade Low Power Digital Gain AD8221/2 AD8231 AD620 AD8420 AD8250 AD8220/4 AD8290 AD621 AD8235/6 AD8251 AD8228 AD8293 AD524 AD627 AD8253 AD8295 AD8553 AD526 AD8226/7 AD8231 AD8556 AD624 AD623 AD8557 AD8223 1 See www.analog.com for the latest instrumentation amplifiers. GENERAL DESCRIPTION The AD8420 is a low cost, wide supply range amplifier that uses two resistors to set any gain between 1 and 1000. It is optimized to amplify small differential voltages in the presence of large common mode signals. The AD8420 is based on a current mode architecture that gives it excellent input common mode range. Unlike conventional instrumentation amplifiers, the AD8420 can easily amplify signals at or even slightly below ground without requiring dual supplies. The AD8420 has a full rail to rail output, and the output voltage is completely independent of the input common mode voltage. The AD8420 can operate off both single or dual supplies. It works well for a portable system with a limited single supply voltage and equally well for a system using large dual supplies. Gain is set using the ratio of two resistors. A reference pin allows the user to offset the output voltage. This feature is useful when the output signal needs to be centered around a specific voltage, such as mid-supply. The AD8420 is available in an 8 pin MSOP package. Performance is specified over the full temperature range of −40°C to +85°C. Part is operational from −40°C to +125°C |
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Ähnliche Beschreibung - AD8420BRMZ-RL |
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