AD7892-规格书

AD7892aLC2MOSSingleSupply,12-Bit600kSPSADCFUNCTIONALBLOCKDIAGRAMREFOUT/REFINVDD+2.5VREFERENCE2k
12-BITADCTRACK/HOLDSIGNALSCALINGAD7892MODEDB0DB2DB10/LOWDB11/LOWDGNDAGNDCONTROLLOGICCONVSTEOCRDCSVIN1VIN2CLOCKDB3/RFSDB4/SCLKDB5/SDATASTANDBYTheAD7892isfabricatedinAnalogDevices’LinearCompat-ibleCMOS(LC2MOS)process,amixedtechnologyprocessthatcombinesprecisionbipolarcircuitswithlowpowerCMOSlogic.Itisavailableina24-lead,0.3wide,plasticorhermeticDIPorina24-leadSOIC.PRODUCTHIGHLIGHTS1.TheAD7892-3featuresaconversiontimeof1.47µsandatrack/holdacquisitiontimeof200ns.Thisallowsathrough-putrateforthepartupto600kSPS.TheAD7892-1andAD7892-2operatewiththroughputratesof500kSPS.2.TheAD7892operatesfromasingle+5Vsupplyandcon-sumes60mWtypmakingitidealforlowpowerandportableapplications.3.Thepartoffersahighspeed,flexibleinterfacearrangementwithparallelandserialinterfacesforeasyconnectiontomicroprocessors,microcontrollersanddigitalsignalprocessors.GENERALDESCRIPTIONTheAD7892isahighspeed,lowpower,12-bitA/Dconverterthatoperatesfromasingle+5Vsupply.Thepartcontainsa1.47µssuccessiveapproximationADC,anon-chiptrack/holdamplifier,aninternal+2.5Vreferenceandon-chipversatileinterfacestructuresthatallowbothserialandparallelconnec-tiontoamicroprocessor.Thepartacceptsananaloginputrangeof±10Vor±5V(AD7892-1),0Vto+2.5V(AD7892-2)and±2.5V(AD7892-3).OvervoltageprotectionontheanaloginputsfortheAD7892-1andAD7892-3allowstheinputvoltagetogoto±17Vor±7Vrespectivelywithoutdamagingtheports.TheAD7892offersachoiceoftwodataoutputformats:asingle,parallel,12-bitwordorserialdata.Fastbusaccesstimesandstandardcontrolinputsensureeasyparallelinterfacetomicroprocessorsanddigitalsignalprocessors.Ahighspeedserialinterfaceallowsdirectconnectiontotheserialportsofmicrocontrollersanddigitalsignalprocessors.Inadditiontothetraditionaldcaccuracyspecificationssuchaslinearity,full-scaleandoffseterrors,thepartisalsospecifiedfordynamicperformanceparametersincludingharmonicdistortionandsignal-to-noiseratio.REV.CInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartieswhichmayresultfromitsuse.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.FEATURESFast12-BitADCwith1.47sConversionTime600kSPSThroughputRate(AD7892-3)500kSPSThroughputRate(AD7892-1,AD7892-2)SingleSupplyOperationOn-ChipTrack/HoldAmplifierSelectionofInputRanges:10Vor5VforAD7892-10Vto+2.5VforAD7892-22.5VforAD7892-3HighSpeedSerialandParallelInterfaceLowPower,60mWtypOvervoltageProtectiononAnalogInputs(AD7892-1andAD7892-3)OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]WorldWideWebSite:©AnalogDevices,Inc.,2000AD7892*ProductPageQuickLinksLastContentUpdate:08/30/2016ComparablePartsViewaparametricsearchofcomparablepartsEvaluationKits•AD7892EvaluationBoardDocumentationApplicationNotes•AN-414:LowCost,LowPowerDevicesforHDSLApplicationsDataSheet•AD7892:LC2MOSSingleSupply,12-Bit600kSPSADCDataSheet•AD7892:MilitaryDataSheetProductHighlight•8-to18-BitSARADCs...FromtheLeaderinHighPerformanceAnalogReferenceMaterialsAnalogDialogue•ControllerBoardSystemAllowsForEasyEvaluationOfGeneral-PurposeConverters•InterfacingtoSerialConverters•Low-Power,Low-VoltageICChoicesforECGSystemRequirementsTechnicalArticles•MS-2210:DesigningPowerSuppliesforHighSpeedADCDesignResources•AD7892MaterialDeclaration•PCN-PDNInformation•QualityAndReliability•SymbolsandFootprintsDiscussionsViewallAD7892EngineerZoneDiscussionsSampleandBuyVisittheproductpagetoseepricingoptionsTechnicalSupportSubmitatechnicalquestionorfindyourregionalsupportnumber*ThispagewasdynamicallygeneratedbyAnalogDevices,Inc.andinsertedintothisdatasheet.Note:Dynamicchangestothecontentonthispagedoesnotconstituteachangetotherevisionnumberoftheproductdatasheet.Thiscontentmaybefrequentlymodified.(VDD=+5V5%,AGND=DGND=0V,REFIN=+2.5V.AllspecificationsTMINtoTMAXunlessotherwisenoted.)AD7892–SPECIFICATIONSParameterAVersions1BVersionsSVersion2UnitTestConditions/CommentsDYNAMICPERFORMANCEAD7892-1,AD7892-2fIN=100kHz.fSAMPLE=500kSPSSignalto(Noise+Distortion)Ratio3707070dBminTotalHarmonicDistortion3–78–78–78dBmaxtyp–84dBPeakHarmonicorSpuriousNoise3–79–79–79dBmaxIntermodulationDistortion3fa=49kHz,fb=50kHz2ndOrderTerms–78–78–78dBmaxtyp–84dB3rdOrderTerms–78–78–78dBmaxtyp–84dBAD7892-3fIN=100kHz.fSAMPLE=600kSPSSignalto(Noise+Distortion)Ratio37070dBminTotalHarmonicDistortion3–78–78dBmaxPeakHarmonicorSpuriousNoise3–79–79dBmaxIntermodulationDistortion3fa=49kHz,fb=50kHz2ndOrderTerms–78–78dBmax3rdOrderTerms–78–78dBmaxDCACCURACYResolution121212BitsMinimumResolutionforWhichNoMissingCodesAreGuaranteed121212BitsRelativeAccuracy3±1.5±1±1LSBmaxDifferentialNonlinearity3±1±1±1LSBmaxAD7892-1PositiveFull-ScaleError3±4±4±5LSBmaxNegativeFull-ScaleError3±4±4±5LSBmaxBipolarZeroError3±3±2±3LSBmaxAD7892-3PositiveFull-ScaleError3±4±4LSBmaxNegativeFull-ScaleError3±4±4LSBmaxBipolarZeroError3±4±3LSBmaxAD7892-2PositiveFull-S