PIC16f872和tc1046 1047传感器实现精密温度测量

ThisTechnicalBriefgivesadescriptionofinterfacinga

TC1046temperaturesensortoaPIC16F872micro-controller.A2x20dotmatrixLCDisincludedinthe

designtoprovideadditionalfunctionality.

THEORYOFOPERATION

TheMicrochipTC1046isalinearoutputtemperature

sensorwithanoutputvoltagethatisproportionaltothe

temperatureofitsenvironment.TheTC1046hasa

temperaturerangeof-40°Cto+125°C(±2°C),equiva-lentto165stepsof1°Cat6.25mVperstep.Theout-putvoltagerangesfrom174mV(-40°C)to1205mV

(125°C).Thereisnoneedforanegativepull-down

voltagefortemperaturesbelow0°.MTB051PrecisionTemperatureMeasurementUsingaTC1046/1047SensorandaPIC16F872MCUAuthor:ChrisValentiMicrochipalsoofferstheTC1047temperaturesensor.ThisisidenticalinrangeandoperationtotheTC1046,MicrochipTechnologyInc.withtwomajordifferences:ThisTechnicalBriefgivesadescriptionofinterfacingaThevoltagestepsare10mV/°C