Thisapplicationnotedescribesanewhardware
sensingmethodcalledCapacitiveVoltageDivider
(CVD)whichusesnoexternalcomponents.Itrequires
onlytheADCtoperformcapacitivetouchsensing.The
principleissimple,andcanbeappliedtonearlyany
MicrochipPIC
®
devicewithanADC.AN1298CapacitiveTouchUsingOnlyanADC(“CVD”)SensingStepsAuthors:ThomasPermeDieterPeterToperformthesensing,dothefollowing:MicrochipTechnologyInc.1.DrivesecondarychanneltoVDDasdigitaloutput.INTRODUCTION2.PointADCtothesecondaryVDDpin(chargesCHOLDtoVDD).Thisapplicationnotedescribesanewhardware
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