毕业论文_应用adc0809的ad转换设计

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1、应用ADC0809的A/D转换设计摘要此次设计的主要内容是利用ADC0809设计制做A/D转换器，电位器提供模拟量输入，编制程序，将模拟量转换成二进制数字量，51单片机通过8255的PA口输出到发光二极管进行显示，并将8位二进制数转换为3位BCD码并在3位数码管上进行显示，并在此基础上进行扩展。由于热敏电阻输出量为模拟量，同样通过ADC0809进行A/D转换，并将其输出值在发光二极管以及3位数码管上进行显示，来反映温度的变化。压力传感器的输出量经过ADC0809进行模数转换后经发光二极管以及数码管的显示来反映压力的变化。关键词：ADC0809A/D转换51

2、单片机发光二极管数码管thedesignoftheA/DconversionbasedonADC0809AbstractThemaincontentofthisdesignisthatusetheADC0809makeaA/Dconversion.TheADC0809getAnalogsignalfromPotentiometers.ProgramandtransformitintoDigitalasBinary.The51Single-chipsentthedigitaltoLight-emittingdiodesbytheAI/Ointerfaceof

3、8255，changethe8bitBinarynumberinto3bitBCDcode,thendevelopsit.Theoutputofthethermistorisanalog,usetheADC0809makeaA/DconversionandsenttoLight-emittingdiodesandDigitaltubedisplayittheaimistoReflectthediversificationoftemperature.ADC0809changetheoutputofpressuresensorintodigitaldataan

4、dBedisplayedbyLight-emittingandDigitaltube,fromthiswecanseethechangeofpressurewegave.Keywords:ADC0809A/Dconversion51Single-chipLight-emitting目录1绪论..........................................................................................................................11.1A/D转换概述..

5、..............................................................................................11.1.1A/D转换的概念.................................................................................11.1.2A/D转换器的类型.............................................................................

6、11.2A/D转换在现实中的应用............................................................................12A/D转换的硬件介绍...............................................................................................22.1总体硬件介绍........................................................................

7、.......................22.2电位器概述...................................................................................................22.3ADC0809概述................................................................................................32.3.1ADC0809的内部逻辑结构.....................

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