AD8629中文资料

Zero-Drift,Single-Supply,Rail-to-RailInput/OutputOperationalAmplifierAD8628/AD8629Rev.CInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2004AnalogDevices,Inc.Allrightsreserved.FEATURESLowestauto-zeroamplifiernoiseLowoffsetvoltage:1µVInputoffsetdrift:0.002µV/°CRail-to-railinputandoutputswing5Vsingle-supplyoperationHighgain,CMRR,andPSRR:120dBVerylowinputbiascurrent:100pAmaxLowsupplycurrent:1.0mAOverloadrecoverytime:10µsNoexternalcomponentsrequiredAPPLICATIONSAutomotivesensorsPressureandpositionsensorsStraingageamplifiersMedicalinstrumentationThermocoupleamplifiersPrecisioncurrentsensingPhotodiodeamplifierPINCONFIGURATIONSOUT1V–2+IN3V+5–IN4AD8628TOPVIEW(NottoScale)02735-001Figure1.5-LeadTSOT(UJ-5)and5-LeadSOT-23(RT-5)NC1–IN2+IN3V–4NC8V+7OUT6NC5NC=NOCONNECTAD8628TOPVIEW(NottoScale)02735-002Figure2.8-LeadSOIC(R-8)OUTA1–INA2+INA3V–4V+8OUTB7–INB6+INB5AD8629TOPVIEW(NottoScale)02735-063Figure3.8-LeadSOIC(R-8)OUTA1–INA2+INA3V–4V+8OUTB7–INB6+INB5AD8629TOPVIEW(NottoScale)02735-064Figure4.8-LeadMSOP(RM-8)GENERALDESCRIPTIONThisnewbreedofamplifierhasultralowoffset,drift,andbiascurrent.TheAD8628/AD8629arewidebandwidthauto-zeroamplifiersfeaturingrail-to-railinputandoutputswingsandlownoise.Operationisfullyspecifiedfrom2.7Vto5Vsinglesupply(±1.35Vto±2.5Vdualsupply).TheAD8628/AD8629providebenefitspreviouslyfoundonlyinexpensiveauto-zeroingorchopper-stabilizedamplifiers.UsingAnalogDevices’newtopology,thesezero-driftamplifierscombinelowcostwithhighaccuracyandlownoise.(Noexter-nalcapacitorisrequired.)Inaddition,theAD8628/AD8629greatlyreducethedigitalswitchingnoisefoundinmostchopper-stabilizedamplifiers.Withanoffsetvoltageofonly1µV,driftoflessthan0.005µV/°C,andnoiseofonly0.5µVp-p(0Hzto10Hz),theAD8628/AD8629areperfectlysuitedforapplicationsinwhicherrorsourcescannotbetolerated.Positionandpressuresensors,medicalequipment,andstraingageamplifiersbenefitgreatlyfromnearlyzerodriftovertheiroperatingtemperaturerange.Manysystemscantakeadvantageoftherail-to-railinputandoutputswingsprovidedbytheAD8628/AD8629toreduceinputbiasingcomplexityandmaximizeSNR.TheAD8628/AD8629arespecifiedfortheextendedindustrialtemperaturerange(−40°Cto+125°C).TheAD8628isavailableintinyTSOT-23,SOT-23,andthepopular8-leadnarrowSOICplasticpackages.TheAD8629isavailableinthestandard8-leadnarrowSOICandMSOPplasticpackages.AD8628/AD8629Rev.C|Page2of20TABLEOFCONTENTSSpecifications.....................................................................................3ElectricalCharacteristics.............................................................3AbsoluteMaximumRatings............................................................5ESDCaution..................................................................................5TypicalPerformanceCharacteristics.............................................6FunctionalDescription..................................................................141/fNoise.......................................................................................14Peak-to-PeakNoise....................................................................15NoiseBehaviorwithFirst-OrderLow-PassFilter..................15TotalIntegratedInput-ReferredNoiseforFirst-OrderFilter15InputOvervoltageProtection...................................................16OutputPhaseReversal...............................................................16OverloadRecoveryTime..........................................................16InfraredSensors..........................................................................17PrecisionCurrentShunts..........................................................18OutputAmplifierforHighPrecisionDACs...........................18OutlineDimensions.......................................................................19OrderingGuide..........................................................................20REVISIONHISTORY10/04—DataSheetChangedfromRev.BtoRev.CUpdatedFormatting...........................................................UniversalAddedAD8629....................................................................UniversalAddedSOICandMSOPPinConfigurations...............................1AddedFigure48..............................................................................13ChangestoFigure62......................................................................17AddedMSOPPackage...................................................................19ChangestoOrderingGuide..........................................................2010/03—DataSheetChangedfromRev.AtoRev.BChangestoGeneralDescription.....