DAC108S085中文资料

October2007DAC108S08510-BitMicroPowerOCTALDigital-to-AnalogConverterwithRail-to-RailOutputsGeneralDescriptionTheDAC108S085isafull-featured,generalpurposeOCTAL10-bitvoltage-outputdigital-to-analogconverter(DAC)thatcanoperatefromasingle+2.7Vto+5.5Vsupplyandcon-sumes1.95mWat3Vand4.85mWat5V.TheDAC108S085ispackagedina16-leadLLPpackageanda16-leadTSSOPpackage.TheLLPpackagemakestheDAC108S085thesmallestOCTALDACinitsclass.Theon-chipoutputampli-fiersallowrail-to-railoutputswingandthethreewireserialinterfaceoperatesatclockratesupto40MHzovertheentiresupplyvoltagerange.Competitivedevicesarelimitedto25MHzclockratesatsupplyvoltagesinthe2.7Vto3.6Vrange.TheserialinterfaceiscompatiblewithstandardSPI™,QSPI,MICROWIREandDSPinterfaces.TheDAC108S085alsoof-fersdaisychainoperationwhereanunlimitednumberofDAC108S085scanbeupdatedsimultaneouslyusingasingleserialinterface.TherearetworeferencesfortheDAC108S085.Onerefer-enceinputserveschannelsAthroughDwhiletheotherreferenceserveschannelsEthroughH.Eachreferencecanbesetindependentlybetween0.5VandVA,providingthewidestpossibleoutputdynamicrange.TheDAC108S085hasa16-bitinputshiftregisterthatcontrolsthemodeofoperation,thepower-downcondition,andtheDACchannels'register/outputvalue.AlleightDACoutputscanbeupdatedsimulta-neouslyorindividually.Apower-onresetcircuitensuresthattheDACoutputspoweruptozerovoltsandremainthereuntilthereisavalidwritetothedevice.Thepower-downfeatureoftheDAC108S085al-lowseachDACtobeindependentlypoweredwiththreedif-ferentterminationoptions.WithalltheDACchannelspowereddown,powerconsumptionreducestolessthan0.3µWat3Vandlessthan1µWat5V.Thelowpowerconsump-tionandsmallpackagesoftheDAC108S085makeitanexcellentchoiceforuseinbatteryoperatedequipment.TheDAC108S085isoneofafamilyofpincompatibleDACs,includingthe8-bitDAC088S085andthe12-bitDAC128S085.Allthreepartsareofferedwiththesamepinout,allowingsys-temdesignerstoselectaresolutionappropriatefortheirapplicationwithoutredesigningtheirprintedcircuitboard.TheDAC108S085operatesovertheextendedindustrialtemper-aturerangeof−40°Cto+125°C.Features■GuaranteedMonotonicity■LowPowerOperation■Rail-to-RailVoltageOutput■DaisyChainCapability■Power-onResetto0V■SimultaneousOutputUpdating■IndividualChannelPowerDownCapability■Widepowersupplyrange(+2.7Vto+5.5V)■DualReferenceVoltageswithrangeof0.5VtoVA■OperatingTemperatureRangeof−40°Cto+125°C■Industry'sSmallestPackageKeySpecifications■Resolution10bits■INL±2LSB(max)■DNL+0.35/−0.2LSB(max)■SettlingTime6µs(max)■ZeroCodeError+15mV(max)■Full-ScaleError−0.75%FSR(max)■SupplyPower■—Normal1.95mW(3V)/4.85mW(5V)typ—PowerDown0.3µW(3V)/1µW(5V)typApplications■Battery-PoweredInstruments■DigitalGainandOffsetAdjustment■ProgrammableVoltage&CurrentSources■ProgrammableAttenuators■VoltageReferenceforADCs■SensorSupplyVoltage■RangeDetectorsOrderingInformationOrderNumbersTemperatureRangePackageTopMarkDAC108S085CISQ−40°C≤TA≤+125°C16-LeadLLPDAC108S085CISQX−40°C≤TA≤+125°CLLPTape-and-ReelDAC108S085CIMT−40°C≤TA≤+125°C16-LeadTSSOPX80CDAC108S085CIMTX−40°C≤TA≤+125°CTSSOPTape-and-ReelX80CDAC108S085EBEvaluationBoard-BOTHSPI™isatrademarkofMotorola,Inc.©2007NationalSemiconductorCorporation300312(LLPonly)GroundExposeddieattachpadcanbeconnectedtogroundorleftfloating.SolderingthepadtothePCBoffersoptimalthermalperformanceandenhancespackageself-alignmentduringreflow.3(Notes1,2)IfMilitary/Aerospacespecifiedd