毕业论文外文翻译-ds18b20单线温度传感器

《毕业论文外文翻译-ds18b20单线温度传感器》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、DS18B20Single一wiretemperaturesensor一.FEATURESonlyoneportpinforcommunicationserialcodedistributed•Unique1-Wireinterfacerequires•Eachdevicehasaunique64-bit•Multidropcapabilitysimplifies•Requiresnoexternalcomponents•Canbepoweredfromdataline.Powersupply•Measurestemperaturesfrom-55

2、°Cto+125°accuracyfrom-10°Cto+85°C•Thermometerresolutionisuser-selectablefrom9to12bitsstoredinanonboardROMtemperaturesensingapplicationsrangeis3.OVto5.5VC(-67°Fto+257°F)r0.C•Convertstemperatureto12-bitdigitalwordin750ms(max.)•User-definablenonvolatile(NV)alarmsettings•Alarmsear

3、chcommandidentifiesandaddressesdeviceswhosetemperatureisoutsideofprogrammed1imits(temperaturealarmcondition)•Availablein8-pinSO(loOmi1),8-pinLSOP,and3~pinTO-92packages•SoftwarecompatiblewiththeDS1822•Applicationsincludethermostaticcontrols,industrialsystems,consumerproducts,th

4、ermometers,oranythermallysensitive二.DESCRIPTIONTheDS18B20DigitaiThermometerprovides9to12-bitcentigradetemperaturemeasurementsandhasanalarmfunctionwithnonvolatileuser-programmab1eupperandlowertriggerpoints.TheDS18B20communicatesovera1-Wirebusthatbydefinitionrequiresonlyonedatal

5、ine(andground)forcommunicationwithacentralmicroprocessor.Ithasanoperatingtemperaturerangeof-55°Cto+125°Candisaccurateto「0.5[Covertherangeof-10°Cto+85°C.Tnaddition,theDS18B20canderivepowerdirectlyfromthedataline(uparasitepower”),eliminatingtheneedforanexternalpowersupply・EachDS

6、18B20hasaunique64-bitserialcode,whicha11owsmultipleDS18B20stofunctiononthesame1-wirebus;thus,itissimpletouseonemicroprocessortocontrolmanyDS18B20sdistributedoveralargearea.ApplicationsthatcanbenefitfromthisfeatureincludeIIVACenvironmentalcontrols,temperaturemonitoringsystemsin

7、sidebuildings,equipmentormachinery,andprocessmonitoringandcontrolsystems・三.OVERVIEWFigure1showsablockdiagramoftheDS18B20,andpindescriptionsaregiveninTable1・The64-bitROMstoresthedevice"suniqueserialcode.Thescratchpadmemorycontainsthe2-bytetemperatureregisterthatstoresthedigital

8、outputfromthetemperaturesensor.Inaddition,thescratchpadprovid