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Low-Power 3V ADC is 0.05% Linear

上传者: 2022-09-05 12:58:14上传 PDF文件 45.17 KB 热度 9次

Abstract:Thisapplicationnotedescribesusingamicrocontroller(µC)withintegrateddigital-to-analogconverter(DAC)andcomparatorstocreatealowcostADCthatis0.05%linear.Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsAmplifierandComparatorCircuitsKeywords:PWM,DAC,ADC,PIC,microcontroller,uc,MCU,lowpower,analogdigitalconverter,digitalanalogJul09,1998converters,a/dd/aconverterAPPLICATIONNOTE1031Low-Power3VADCis0.05%LinearAbstract:Thisapplicationnotedescribesusingamicrocontroller(C)withintegrateddigital-to-analogconverter(DAC)andcomparatorstocreatealowcostADCthatis0.05%linear.Thesimple3Vanalog-to-digitalconverter(ADC)showninFigure1isverysmall,requiresnonegativesupplyorexpensiveprecisioncomponents,anddrawsminimalsupplycurrent(10A).Asingleconversionconsistsof12,000comparisonsandtakesabout300ms.Thecircuitoperatesasdescribedbelow.Fi

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