毕业论文外文翻译-DS18B20 单线温度传感器

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1、DS18B20Single-wiretemperaturesensor一.FEATURES●Unique1-Wireinterfacerequiresonlyoneportpinforcommunication●Eachdevicehasaunique64-bitserialcodestoredinanonboardROM●Multidropcapabilitysimplifiesdistributedtemperaturesensingapplications●Requiresnoexternalc

2、omponents●Canbepoweredfromdataline.Powersupplyrangeis3.0Vto5.5V●Measurestemperaturesfrom–55°Cto+125°C(–67°Fto+257°F)
0.5Caccuracyfrom–10°Cto+85°C●Thermometerresolutionisuser-selectablefrom9to12bits●Convertstemperatureto12-bitdigitalwordin750ms(max.)●Us

3、er-definablenonvolatile(NV)alarmsettings●Alarmsearchcommandidentifiesandaddressesdeviceswhosetemperatureisoutsideofprogrammedlimits(temperaturealarmcondition)●Availablein8-pinSO(150mil),8-pinSOP,and3-pinTO-92packages●SoftwarecompatiblewiththeDS1822●App

4、licationsincludethermostaticcontrols,industrialsystems,consumerproducts,thermometers,oranythermallysensitive二.DESCRIPTIONTheDS18B20DigitalThermometerprovides9to12–bitcentigradetemperaturemeasurementsandhasanalarmfunctionwithnonvolatileuser-programmableu

5、pperandlowertriggerpoints.TheDS18B20communicatesovera1-Wirebusthatbydefinitionrequiresonlyonedataline(andground)forcommunicationwithacentralmicroprocessor.Ithasanoperatingtemperaturerangeof–55°Cto+125°Candisaccurateto
0.5Covertherangeof–10°Cto+85°C.Ina

6、ddition,theDS18B20canderivepowerdirectlyfromthedataline(“parasitepower”),eliminatingtheneedforanexternalpowersupply.EachDS18B20hasaunique64-bitserialcode,whichallowsmultipleDS18B20stofunctiononthesame1–wirebus;thus,itissimpletouseonemicroprocessortocont

7、rolmanyDS18B20sdistributedoveralargearea.ApplicationsthatcanbenefitfromthisfeatureincludeHVACenvironmentalcontrols,temperaturemonitoringsystemsinsidebuildings,equipmentormachinery,andprocessmonitoringandcontrolsystems.三.OVERVIEWFigure1showsablockdiagram

8、oftheDS18B20,andpindescriptionsaregiveninTable1.The64-bitROMstoresthedevice’suniqueserialcode.Thescratchpadmemorycontainsthe2-bytetemperatureregisterthatstoresthedigitaloutputfromthetemperaturesensor.Inaddition,thescratchpadprovi