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1、外文翻译学院：物理与信息工程学院专业：微电子学与固体电子学姓名：陈建智学号：141120039导师：（签名）成绩：年级：2014级2015年03月TemperatureSensorICsSimplifyDesignsWhenyousetouttoselectatemperaturesensor,youarenolongerlimitedtoeitherananalogoutputoradigitaloutputdevice.Thereisnowabroadselectionofsensortypes,oneofwhichshouldmatchyoursy
2、stcnfsnccds.Untilrecently,allthetemperaturesensorsonthemarketprovidedanalogoutputs.Thermistors,RTDs,andthermocoupleswerefollowedbyanotheranalog-outputdevice,thesilicontemperaturesensor.Inmostapplications,unfortunately,theseanalog-outputdevicesrequireacomparator,anADC,oranamplifie
3、rattheiroutputtomakethemuseful.Thus,whenhigherlevelsofintegrationbecamefeasible,temperaturesensorswithdigitalinterfacesbecameavailable.TheseICsaresoldinavarietyofforms,fromsimpledevicesthatsignalwhenaspecifictemperaturehasbeenexceededtothosethatreportbothremoteand1ocaltemperature
4、swhileprovidingwarningsatprogrammedtcmpcraturcsettings.Thechoicenowisn"tsimplybetweenanalog-outputanddigital-outputsensors;thereisabroadrangeofsensortypesfromwhichtochoose.ClassesofTemperatureSensorsFourtcmpcrature-sensortypcsarcillustratedinFigure1.Anidceilanalogsensorprovidesan
5、outputvoltagethatisaperfectlylinearfunctionoftemperature(A).InthedigitalI/Oclassofsensor(B),temperaturedataintheformofmultipieIsandOsarepassedtothemicrocontroller,oftenviaaserialbus.Alongthesamebus,dataaresenttothetemperaturesensorfromthemicrocontroller,usuallytosetthetemperature
6、limitatwhichthealertpinsdigitaloutputwilltrip.Alertinterruptsthemicrocontrollerwhenthetemperaturehasbeenexceeded.Thistypeofdevicecanalsoprovidefancontrol.pc丄AknDigitalVO^AnalogPlus"SyMcmMiMiilurM—述¥lAknFin—•••■—Figure1・SensorandICmanufacturerscurrentlyofferfourclassesoftemperatur
7、esensors.HAnalog-plus'1sensors(C)areavailablewithvarioustypesofdigitaloutputs.TheV()utversustemperaturecurveisforanICwhosedigitaloutputswitcheswhenaspecifictemperaturehasbeenexceeded.Inthiscase,the"plus”addedtotheanalogtemperaturesensorisnothingmorethanacomparatorandavoltagerefer
8、ence・Othertypesof"plus"partsshiptemperat
