数字世界中的模拟设计，采用混合信号控制器

ThepurposeofthisApplicationNoteistofamiliarize

engineerswithPIC16C78Xdesignconsiderations,

specifically:

•Potentialnoiseproblemsinmixedsignaldesign

•Featuresandperformanceofthenewanalog/digi-

talperipherals

•SomecommonapplicationsforthePIC16C78X

ThePIC16C781andPIC16C782arethefirstdevicesin

anewlineofmixedanalog/digitalmicrocontrollersfrom

Microchip.Thesemicrocontrollersareamarriageof

ourtraditionalmicrocontrollerarchitecturewithnew

mixedsignalperipheralsthatchangemanyoftheold

conventionsofembeddedmicrocontrollerdesign.Not

onlydothenewperipheralsopenupnewapplications

forthemicrocontroller,theybringnewdesignconcerns

thatmightbeunfamiliartotraditionalmicrocontroller

designers.ThisApplicationNotewillhighlightsomeof

thecommonproblemsassociatedwithmixedsignal

designandoffertechniquesforovercomingtheseprob-

lems.Itwillalsocoverthefeaturesandperformanceof

thenewperipherals.Finally,thisApplicationNotecov-

erssomeofthecommonapplicationsthattakeadvan-

tageofthePIC16C78X'suniqueperipherals.AN823AnalogDesigninaDigitalWorldUsingMixedSignalControllersIDENTIFYINGNOISESOURCESAuthor:KeithCurtisIdentifyingpotentialnoisesourcesinadesignistheMicrochipTechnologyInc.firststepincontrollingoreliminatingnoiseinamixedsignaldesign.Almostanyactivecircuitinadesigncangeneratenoise;however,somecircuitsaremorelikelytobecomenoisegene