A Simple Thermistor Interface to an ADC

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Abstract:Thisarticledescribesasimpleandcosteffectivemethodofmeasuringtemperatureusingathermistorconnectedinahalf-bridgeconfiguration.ThegoalistoperformaratiometricmeasurementsuchthattheVREFsourcevoltagetothedivideristhesameasthereferencetotheanalog-to-digitalconverter(ADC)usedtomeasurethevoltageatVT.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSKeywords:halfbridge,thermistor,ADC,A/Dconverter,NTC,PTC,ratiometric,negativetemperatureSep27,2002coefficent,positiontemperaturecoefficent,analogtodigitalconvertersAPPLICATIONNOTE1753ASimpleThermistorInterfacetoanADCAbstract:Thisarticledescribesasimpleandcosteffectivemethodofmeasuringtemperatureusingathermistorconnectedinahalf-bridgeconfiguration.ThegoalistoperformaratiometricmeasurementsuchthattheVREFsourcevoltagetothedivideristhesameasthereferencetotheanalog-to-digitalconverter(ADC)usedtomeasurethevoltageatVT.Therearemanycircuitsandmeasurementmethodsthatcanbeusedwithathermistortodeterminethetemperature.Thesimplesta

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