AD7655中文资料

REV.0InformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectivecompanies.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2003AnalogDevices,Inc.Allrightsreserved.AD7655*LowCost4-Channel1MSPS16-BitADCFUNCTIONALBLOCKDIAGRAMCLOCKANDCONTROLLOGICA/B16D[15:0]BUSYCSSER/PAROGNDOVDDDGNDDVDDSERIALPORTPARALLELINTERFACEBYTESWAPRDAVDDAGNDREFxREFGNDPDRESETCNVSTINANSWITCHEDCAPDACAD7655INA1TRACK/HOLD
2IMPULSEMUXMUXEOCMUXINA2A0INB1INBNINB2PulSARSelectionType/kSPS100–250500–570800–1000PseudoAD7651AD7650/AD7652AD7653DifferentialAD7660/AD7661AD7664/AD7666AD7667TrueBipolarAD7663AD7665AD7671TrueDifferentialAD7675AD7676AD767718-BitAD7678AD7679AD7674Multichannel/AD7654SimultaneousAD7655PRODUCTHIGHLIGHTS1.MultichannelADCTheAD7655features4-channelinputswithtwosample-and-holdcircuitsthatallowsimultaneoussampling.2.FastThroughputTheAD7655isaveryhighspeed(1MSPSinnormalmodeand888kSPSinimpulsemode),chargeredistribution,16-bitSARADCthatavoidspipelinedelay.3.Single-SupplyOperationTheAD7655operatesfromasingle5Vsupplyanddissipatesonly120mWtypical,evenlowerwhenareducedthroughputisusedwiththereducedpowermode(Impulse)andapower-downmode.4.SerialorParallelInterfaceVersatileparallelor2-wireserialinterfacearrangementcompatiblewithboth3Vor5Vlogic.*PatentpendingFEATURES4-Channel,16-BitResolutionADC2Track-and-HoldAmplifiersThroughput:1MSPS(NormalMode)888kSPS(ImpulseMode)AnalogInputVoltageRange:0Vto5VNoPipelineDelayParallelandSerial5V/3VInterfaceSPI®/QSPI™/MICROWIRE™/DSPCompatibleSingle5VSupplyOperationPowerDissipation120mWTypical,2.6mW@10kSPSPackage:48-LeadQuadFlatPack(LQFP)or48-LeadFrameChipScalePack(LFCSP)Pin-to-PinCompatiblewiththeAD7654LowCostAPPLICATIONS4-ChannelDataAcquisitionGENERALDESCRIPTIONTheAD7655isalowcost,4-channel,16-bit,chargeredistributionSAR,analog-to-digitalconverterthatoperatesfromasingle5Vpowersupply.Itcontainstwolownoise,widebandwidthtrack-and-holdamplifiersthatallowsimultaneoussampling,ahighspeed1MSPS16-bitsamplingADC,aninternalconversionclock,errorcorrectioncircuits,andbothserialandparallelsysteminterfaceports.Eachtrack-and-holdhasamultiplexerinfronttoprovidea4-channelinputADC.TheAD7655featuresaveryhighsamplingratemode(Normal)and,forlowpowerapplications,areducedpowermode(Impulse)wherethepowerisscaledwiththethroughput.Itisavailablein48-leadLQFPor48-leadLFCSPpackageswithoperationspecifiedfrom–40∞Cto+85∞C.REV.0–2–AD7655–SPECIFICATIONSParameterConditionsMinTypMaxUnitRESOLUTION16BitsANALOGINPUTVoltageRangeVINx–VINxN02VREFCommon-modeInputVoltageVINxN–0.1+0.5VAnalogInputCMRRfIN=100kHz55dBInputCurrent1MSPSThroughput45mAInputImpedanceSeeAnalogInputSectionTHROUGHPUTSPEEDCompleteCycle(2channels)InNormalMode2msThroughputRateInNormalMode01MSPSCompleteCycle(2channels)InImpulseMode2.25msThroughputRateInImpulseMode0888kSPSDCACCURACYIntegralLinearityError–6+6LSB1NoMissingCodes15BitsTransitionNoise0.8LSBFull-ScaleError2TMINtoTMAX±0.25±0.5%ofFSRFull-ScaleErrorDrift2±2ppm/
CUnipolarZeroError2TMINtoTMAX±0.25%ofFSRUnipolarZeroErrorDrift2±0.8ppm/
CPowerSupplySensitivityAVDD=5V±5%±0.8LSBACACCURACYSignal-to-NoisefIN=100kHz86dB3SpuriousFreeDynamicRangefIN=100kHz98dBTotalHarmonicDistortionfIN=100kHz–96dBSignal-to-(Noise+Distortion)fIN=100kHz86dBfIN=100kHz,–60dBInput30dBChannel-to-ChannelIsolationfIN=100kHz–92dB–3dBInputBandwidth10MHzSAMPLINGDYNAMICSApertureDelay42nsApertureDelayMatching430psApertureJitter45psrmsTransientResponseFull-ScaleStep250nsREFERENCEExternalReferenceVoltageRange2.32.5AVDD/2VExternalReferenceCurrentDrain1MSPSThroughput180mADIGITALINPUTSLogicLevelsVIL–0.3+0.8VVIH+2.0OVDD+0.3VIIL–1+1mAIIH–1+1mADIGITALOUTPUTSDataFormatParallelorSerial16-BitStraightBinaryCodingPipelineDelayConversionResultsAvailableImmediatelyafterCompletedConversionVOLISINK=1.6mA0.4VVOHISOURCE=–500mAOVDD–0.2V(–40Cto+85C,VREF=2.5V,AVDD=AVDD=5V,OVDD=2.7Vto5.25V,unlessotherwisenoted.)REV.0AD7655–3–ParameterConditionsMinTypMaxUnitPOWERSUPPLIESSpecifiedPerformanceAVDD4.7555.25VDVDD4.7555.25VOVDD2.255.255VOperatingCurrent61MSPSThroughputAVDD15.5mADVDD8.5mAOVDD100mAPowerDissipation1MSPSThroughput6120135mW20kSPSThroughput72.6mW888kSPSThroughput7114125mWTEMPERATURERANGE8SpecifiedPerformanceTMINtoTMAX–40+85∞CNOTES1LSBmeansleastsignificantbit.Withthe0Vto5Vinputrange,oneLSBis76.294mV.2SeeDefinitionofSpecificationssection.Thesespecificationsdonotincludetheerrorcontributionfromtheexternalreference.3AllspecificationsindBarereferredtoafull-scaleinputFS.Testedwithaninputsignalat0.5dBbelowfullscale,unlessotherwisespecified.4Sampletestedduringinitialrelease.5Themaximumshouldbetheminimumof5.25VandDVDD+0.3V.6InNormalMode.7InImpulseMode.8Contactfactoryforextendedtemperaturerange.Specificationssubjecttochangewithoutnotice.TIMINGSPECIFICATION