AD5420中文资料

SingleChannel,16-Bit,SerialInput,CurrentSourceDACPreliminaryTechnicalDataAD5420Rev.PrDInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2007AnalogDevices,Inc.Allrightsreserved.FEATURES16-BitResolutionandMonotonicityCurrentOutputRanges:4–20mA,0–20mAor0–24mA0.1%typTotalUnadjustedError(TUE)5ppm/°COutputDriftFlexibleSerialDigitalInterfaceOn-ChipOutputFaultDetectionOn-ChipReference(10ppm/°CMax)AsynchronousCLEARFunctionPowerSupply(AVDD)Range10.8Vto60V;AD5420BCPZ10.8Vto40V;AD5420BREZOutputLoopCompliancetoAVDD–2.5VTemperatureRange:-40°Cto+85°CTSSOPandLFCSPPackagesAPPLICATIONSProcessControlActuatorControlPLCGENERALDESCRIPTIONTheAD5420isalow-cost,precision,fullyintegrated16-bitconverterofferingaprogrammablecurrentsourceoutputdesignedtomeettherequirementsofindustrialprocesscontrolapplications.Theoutputcurrentrangeisprogrammableto4mAto20mA,0mAto20mAoranoverrangefunctionof0mAto24mA.Theoutputisopencircuitprotectedandcandriveinductiveloadsof1H.Thedeviceisspecifiedtooperatewithapowersupplyrangefrom10.8Vto40V(AD5420BREZ)or10.8Vto60V(AD5420BCPZ).Outputloopcomplianceis0VtoAVDD–2.5V.TheflexibleserialinterfaceisSPIandMICROWIREcompatibleandcanbeoperatedin3-wiremodetominimizethedigitalisolationrequiredinisolatedapplications.Thedevicealsoincludesapower-on-resetfunctionensuringthatthedevicepowersupinaknownstateandanasynchronousCLEARpinwhichsetstheoutputtothelowendoftheselectedcurrentrange.Thetotaloutputerroristypically±0.1%FSR.Table1.RelatedDevicesPartNumberDescriptionAD5422SingleChannel,16-Bit,SerialInputCurrentSourceandVoltageOutputDACAD5412SingleChannel,12-Bit,SerialInputCurrentSourceandVoltageOutputDACAD5410SingleChannel,12-Bit,SerialInputCurrentSourceDACAD5420PreliminaryTechnicalDataRev.PrD|Page2of29TABLEOFCONTENTSFeatures..............................................................................................1Applications.......................................................................................1GeneralDescription.........................................................................1RevisionHistory...............................................................................2FunctionalBlockDiagram..............................................................3Specifications.....................................................................................4ACPerformanceCharacteristics................................................6TimingCharacteristics................................................................7AbsoluteMaximumRatings............................................................9ESDCaution..................................................................................9PinConfigurationandFunctionDescriptions...........................10TypicalPerformanceCharacteristics...........................................12Terminology....................................................................................17TheoryofOperation......................................................................18Architecture.................................................................................18SerialInterface............................................................................18Defaultconfiguration.................................................................21TransferFunction.......................................................................21DataRegister...............................................................................21ControlRegister..........................................................................21RESETregister............................................................................22Statusregister..............................................................................22Features............................................................................................23faultalert......................................................................................23AsynchronousClear(CLEAR).................................................23InternalReference......................................................................23Externalcurrentsettingresistor...............................................23DigitalPowerSupply..................................................................23Externalboostfunction.............................................................23digitalSlewratecontrol.............................................................24IOUTFilteringCapacitors............................................................24ApplicationsInformation.............................