TEXAS INSTRUMENTS ADS1232 ADS1234 数据手册

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查询ADS1232供应商BurrĆBrown Productsfrom Texas InstrumentsADS1232ADS1234SBAS350–JUNE2005UltraLow-Noise,24-BitAnalog-to-DigitalConverterFEATURES••Upto23.5EffectiveBitsRMSNoise:–17nVat10Hz–44nVat80HzOn-BoardLowNoiseGain-Amp19.2-BitNoise-FreeResolutionatGain=64Simultaneous50Hzand60HzRejection:–InternalClock:110dB–ExternalClock:130dB±1%Low-DriftOn-BoardOscillatorSelectableGainsof1,2,64,and128Selectable10/80SPSConversionRates2-ChannelDifferentialInputwithBuilt-InTempsensor(ADS1232)4-ChannelDifferentialInput(ADS1234)ExternalReferenceuptoAVDDSimpleSerialDigitalInterfaceSupplyRange:2.7Vto5.3V–40°Cto+105°CTemperatureRangeDESCRIPTIONTheADS1232andADS1234areprecisionanalog-to-digital(A/D)ablegainsof1,2,64,or128allowfull-scaledifferentialinputrangesof±2.5Vto±19.5mVwitha+heADS1232offersatwo-channeldifferentialinputandabuilt-intemperaturesensor,ow-noiseGain-Ampfeatureslowdifferentia-boardoscillatorisproviicesalsofeaturealowcurrentdrivertoaccommodateanexternalcrystal;hefeaturesoftheADS1232/ADS1234arehard-wireselected,accessedoverasimpleseri1232isavailableinthe24-pinTSSOPpackage,andtheADS1234isavailableinthe28-pinTSSOP.••••••••APPLICATIONS••••WeighScalesStrainGaugesBridgeSensorsIndustrialProcessControlAVDDCAPREFPREFNDVDDGAIN[1:0]AINP1AINN1AINP2AINN2AINP3AINN3AINP4AINN4A=1,2,64,128InputMuxPGA∆ΣADCPDWNDRDY/DOUTSCLKInternalOscillatorExternalOscillatorSPEEDA1/TEMP(1)A0ADS1234OnlyAGNDCAPXTAL1/CLKINXTAL2DGNDNOTE:(1)A1forADS1234,beawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconduTPREVIEWinfornstrumentsght©2005,TexasInstrumentsIncorporatedPRODUCT

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ADS1232ADS1234SBAS350–nstrumentsrecommeageionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametrNGINFORMATION(1)PRODUCTPACKAGE-LEADPACKAGEDESIGNATORPWPWSPECIFIEDTEMPERATURERANGE–40°Cto105°C–40°Cto105°CPACKAGEMARKINGADS1232ADS1234ORDERINGNUMBERADS1232IPWTADS1232IPWRADS1234IPWTADS1234IPWRTRANSPORTMEDIA,QUANTITYTapeandReel,250TapeandReel,2500TapeandReel,250TapeandReel,2500ADS1232ADS1234(1)TSSOP-24TSSOP-28Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,T PREVIEWABSOLUTEMAXIMUMRATINGSoveroperatingfree-airtemperaturerange(unlessotherwisenoted)AVDDtoAGNDDVDDtoDGNDAGNDtoDGNDInputCurrentInputCurrentAnalogInputVoltagetoAGNDDigitalInputVoltagetoDGNDMaximumJunctionTemperatureOperatingTemperatureRangeStorageTemperatureRangeLeadTemperature(soldering,10s)(1)(1)ADS1232,ADS1234–0.3to+6–0.3to+6–0.3to+0.3100,Momentary10,Continuous–0.3toAVDD+0.3–0.3toDVDD+0.3+150–40to+105–60to+150+300UNITVVVmAmAVV°C°C°C°CStressesbeyondthoselistrestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyoretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.2

S350–JUNE2005ELECTRICALCHARACTERISTICS:VREF=+5VAllspecificationsTA=–40°Cto+105°C,AVDD=DVDD=VREFP=+5V,VREFN=AGND,InternalOscillator,SPEED=Low,Gain=64(unlessotherwisespecified).ADS1232,ADS1234PARAMETERAnalogInputsFull-ScaleInputVoltage(AINP-AINN)Common-modeInputRangeAINxPorAINxNwithrespecttoGND,Gain=1Gain=64,128DifferentialInputCurrentSystemPerformanceResolutionNomissingcodesInternalOscillator,SPEED=HighConversionRateInternalOscillator,SPEED=LowExternalOscillator,SPEED=HighExternalOscillator,SPEED=LowDigitalFilterSettlingTimeFullSettlingDifferentialinput,EndpointfitGain=1,2Differentialinput,EndpointfitGain=64,128Gain=1Gain=64Gain=1Gain=64Gain=1Gain=64Gain=1Gain=64Internaloscillator,50Hzand60HzNormal-modeRejection(4)Externaloscillator,50Hzand60Hz,±1HzatDC,Gain=1,∆VDD=1VatDC,Gain=64,∆VDD=0.1VatDC,Gain=1,∆VDD=1VatDC,Gain=64,∆VDD=0.1V100120TBDTBDTBDTBD24TBDTBD8010fCLK/61440fCLK/4915204±0.0002±0.0010±0.2±21150.0010.0010.5±4SeeNoisePerformanceTables10085dBdBTBDTBD±0.0015TBDTBDTBDTBDTBDBitsSPSSPSSPSConversions%ofFSR(1)%ofFSRppmofFSppmofFSµV/°CnV/°C%%ppm/°Cppm/°CdBdBdBdBSPSGain=1,2Gain=64,128AGND–0.1(0.5)AVDD–150050±0.5VREF/GainAVDD+0.1(0.5)AVDD+1VVVnAnACONDITIONSMINTYPMAXUNITIntegralNon-Linearity(INL)InputOffsetError(2)InputOffsetErrorDriftGainError(3)GainErrorDriftCommon-modeRejectionInput-ReferredNoisePower-SupplyRejectionVoltageReferenceInputVoltageReferenceInput(VREF)NegativeReferenceInput(VREFN)PositiveReferenceInput(VREFP)VoltageReferenceInputCurrent(1)(2)(3)(4)VREF=VREFP-VREFN1AGND–0.1VREFN+1.0AVDDAVDD+0.1VVREFP–1.0AVDD+0.150VVVnAFSR=fullscalerange=VREF/GainOffsetcalrorsarecalibratedatthefactory(AVDD=+5V,allgains,TA=+25°C).Specificationisassuredbythecombinationofdesignandfinalproductiontest.3PRODUCT

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ADS1232ADS1234SBAS350–CTRICALCHARACTERISTICS:VREF=+5V(continued)AllspecificationsTA=–40°Cto+105°C,AVDD=DVDD=VREFP=+5V,VREFN=AGND,InternalOscillator,SPEED=Low,Gain=64(unlessotherwisespecified).ADS1232,ADS1234PARAMETERDigitalLogicLevelsVIHVILVOHVOLInputLeakagePowerSupplyPowerSupplyVoltage(AVDD,DVDD)Normalmode,AVDD=3V,Gain=1,2Normalmode,AVDD=3V,Gain=64,128AnalogSupplyCurrentNormalmode,AVDD=5V,Gain=1,2Normalmode,AVDD=5V,Gain=64,128StandbymodePower-downNormalmode,DVDD=3V,Gain=1,2Normalmode,DVDD=3V,Gain=64,128DigitalSupplyCurrentNormalmode,DVDD=5V,Gain=1,2Normalmode,DVDD=5V,Gain=64,128Standbymode,SCLK=HighPower-downNormalmode,AVDD=DVDD=3V,Gain=1,2Normalmode,AVDD=DVDD=5V,Gain=1,2PowerDissipation,TotalNormalmode,AVDD=DVDD=3V,Gain=64,128Normalmode,AVDD=DVDD=5V,Gain=64,128StandbyPower-down2.7600.10.19.12.144.88.6TBDTBD5.3TBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDTBDVµAµAµAµAµAµAµAµAµAµAµAµAmWmWmWmWmWmWIOH=1mAIOL=1mA0

S350–JUNE2005DEVICEINFORMATIONDVDDDVDDDGNDXTAL1/CLKINXTAL2DGNDDGNDTEMPA0CAPCAPAINP1AINN01112ADS12413DRDY/DOUTSCLKPDWNSPEEDGAIN1GAIN0AVDDAGNDREFPREFNAINP2AINN2DGNDXTAL1/CLKINXTAL2DGNDDGNDA1A0CAPCAPAINP1AINN1AINP3AINN31234567ADS5242322212DRDY/DOUTSCLKPDWNSPEEDGAIN1GAIN0AVDDAGNDREFPREFNAINP2AINN2AINP4AINN45PRODUCT

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ADS1232ADS1234SBAS350–ICEINFORMATION(continued)PINDESCRIPTIONSTERMINALNAMEDVDDDGNDXTAL1/CLKINXTAL2DGNDDGNDTEMPA1A0ADS–8ADS1234123456–78ANALOG/DIGITALINPUT/OUTPUTDigitalDigitalDigital/DigitalInputDigitalDigitalDigitalDigitalInputDigitalInputDigitalInputDigitalPowerSupply:2.7Vto5.3VDigitalGroundExternalClockInput:ouseexternalCrystalOscillatoracrossXTAL1/lGroundDigitalGroundOnboardTemperatureDiodeEnableInputpinInputMuxSelectInputpin(MSB)InputMuxSelectInputpin(LSB):A10011A00101ChannelAIN1AIN2AIN3AIN4DESCRIPTIONPRODUCT PREVIEWCAPCAPAINP1AINN1AINP3AINN3AINN4AINP4AINN2AINP2REFNREFPAGNDAVDDGAIN0GAIN19101112––––84AnalogAnalogDigitalInputDigitalInputDigitalInputDigitalInputDigitalInputDigitalInputDigitalInputDigitalInputDigitalInputDigitalInputAnalogAnalogDigitalInputDigitalInputGainAmpBypassCapacitorConnectionGainAmpBypassCapacitorConnectionPositiveAnalogInputChannel1NegativeAnalogInputChannel1PositiveAnalogInputChannel3NegativeAnalogInputChannel3NegativeAnalogInputChannel4PositiveAnalogInputChannel4NegativeAnalogInputChannel2PositiveAnalogInputChannel2NegativeReferenceInputpinPositiveReferenceInputpinAnalogGroundAnalogPowerSupply,2.7Vto5.3VGainSelectInputpin(LSB)GainSelectInputpin(MSB):GAIN10011GAIN00101SPEED01PGA1264128DATARATE10Hz80HzSPEED2125DigitalInputOutputDataRateSelectInputpin:PDWNSCLKDRDY/DOUT222324262728DigitalInputDigitalInputDigitalInputPowerDownInputpin:HoldingthispinlowpowersdowntheentireconverterandresetstheA/ClockInputpin:-PurposeOutput:DataReady:tput:Outputsdata,MSBfirst,onthefirstrisingedgeofSCLK.6

S350–JUNE2005NOISEPERFORMANCETheADS1232/1234offeroutstandingnoiseperformancethatcanbeoptimizedforagivvenfull-scalerangeusingtheon-chipprogrammablegainamplifier,Table1,Table2,Table3,andTable4summarizethetypicalnoiseperformancewithinputsshortedexternallyfordifferentgains,ectiveNumberofBits(ENOB)isdefinedas:•ENOB=ln(FSR/RMSnoise)/ln(2)TheNoiseFreeBitsaredefinedas:•Noise-FreeBits=ln(FSR/Peak-to-PeakNoise)/ln(2)WhereFSR(Full-ScaleRange)=VREF/=5V,VREF=5V,DataRate=10SPSGAIN1264128RMSNOISE420nV270nV19nV17nVPEAK-TO-PEAKNOISE1.79µV900nV125nV110nVENOB(rms)=5V,VREF=5V,DataRate=80SPSGAIN1264128RMSNOISE1.36µV850nV48nV44nVPEAK-TO-PEAKNOISE8.3µV5.5µV307nV247nVENOB(rms)=3V,VREF=3V,DataRate=10SPSGAIN1264128RMSNOISE450nV325nV20nV18nVPEAK-TO-PEAKNOISE2.8µV1.8µV130nV115nVENOB(rms)=3V,VREF=3V,DataRate=80SPSGAIN1264128RMSNOISE2.2µV1.2µV54nV48nVPEAK-TO-PEAKNOISE12µV6.8µV340nV254nVENOB(rms)20.420.219.718.9NOISE-FREEBITS17.917.817.116.57PRODUCT

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29-Jun-2005PACKAGINGINFORMATIONOrderableDeviceADS1232IPWADS1232IPWRADS1234IPWADS1234IPWR(1)Status(1)PREVIEWPREVIEWPREVIEWPREVIEWPackageTypeTSSOPTSSOPTSSOPTSSOPPackageDrawingPWPWPWPWPinsPackageEcoPlan(2)Qty242428286TBDTBDTBDTBDLead/BallFinishCallTICallTICallTICallTIMSLPeakTemp(3)CallTICallTICallTICallTIThemarketingstatusvaluesaredefinedasfollows:ACTIVE:Y:TIhasannouncedthatthedevicewillbediscontinued,:isinproductiontosupportexistingcustomers,W:TE:TIhasdiscontinuedtheproductionofthedevice.(2)EcoPlan-Theplannedeco-friendlyclassification:Pb-Free(RoHS)orGreen(RoHS&noSb/Br)-pleasecheck/productcontentforthe:ThePb-Free/-Free(RoHS):TI'sterms"Lead-Free"or"Pb-Free"meansemiconductorproductsthatarecompatiblewiththecurrentRoHSrequirementsforall6substances,includingtherequirementthatleadnotexceed0.1%esignedtobesolderedathightemperatures,(RoHS&noSb/Br):TIdefines"Green"tomeanPb-Free(RoHScompatible),andfreeofBromine(Br)andAntimony(Sb)basedflameretardants(BrorSbdonotexceed0.1%byweightinhomogeneousmaterial)(3)MSL,PeakTemp.--TheMoistureSensitivityLevelratingaccordingtotheJEDECindustrystandardclassifications,antInformationandDisclaimer:TheinformationprovidedonthispagerepresentsTI'sitsknowledgeandbeliefoninformationprovidedbythirdparties,andakenandcontinuestotakereasonablestepstoproviderepresentativeandaccurateinformationbutmaynothaveconducteddestIsuppliersconsidercertaininformationtobeproprietary,andthusentshallTI'sliabilityarisingoutofsuchinformationexceedthetotalpurchasepriceoftheTIpart(s)um-Page1

MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 MECHANICAL DATA

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