DS18B20-PAR/DS18S20-PAR/DS1822-PAR Advantages for Remote Temperature Sensing
Abstract:ThisapplicationnotedescribeshowtheDS18B20-PAR,DS18S20-PARandDS1822-PARtemperaturesensorintegratedcircuits(ICs)cangreatlysimplifythemechanicalaspectsofimplementingparasitepowerinremoteorprobetypeapplications,ascomparedtotheDS18B20,DS18S20andDS1822."parasitepower"isafeatureofmost1-Wire®devices,whichallowsthemtoderivepowerdirectlyfromthedataline.TheDS18B20,DS18S20andDS1822temperaturesensorsrequirethattheVDDpinbeconnectedtogroundforparasite-poweroperation,whichmayrequireeitherathirdwireoranawkwardjumperconnection.Inthe-PARdevicestheneedforthisconnectioniseliminated.DS18B20-PAR/DS18S20-PAR/DS1822-PARAdvantagesforRemoteTemperatureSensingAug27,2002Abstract:ThisapplicationnotedescribeshowtheDS18B20-PAR,DS18S20-PARandDS1822-PARtemperaturesensorintegratedcircuits(ICs)cangreatlysimplifythemechanicalaspectsofimplementingparasitepowerinremoteorprobetypeapplications,ascomparedtotheDS18B20,DS18S20andDS1822."parasitepower"isafeatureofmost1-Wiredevices,whichallowsthemtoderivepowerdirectlyfromthedataline.TheDS18B20,DS18S20andDS1822temperaturesensorsrequirethattheVDDpinbeconnectedtogroundforparasite-poweroperation,whichmayrequireeitherathirdwireoranawkwardjumperconnection.Inthe-PARdevicestheneedforthisconnectioniseliminated.IntroductionTheDS18B20-PAR,
