目 录
毕业设计任务书............................................................................................................1
开题报告........................................................................................................................2
摘 要..........................................................................................................................6
关键词............................................................................................................................7
引 言............................................................................................................................8
第一章 A/D 转换器.......................................................................................................9
1.1A/D 转换原理 .................................................................................................9
1.2 ADC 性能参数 ............................................................................................11
1.2.1 转换精度........................................................................................11
1.2.2. 转换时间.......................................................................................12
1.3 常用 ADC 芯片概述 ..................................................................................13
第二章 8OC51 单片机引脚 .......................................................................................14
第三章 ADC0809 .......................................................................................................16
3.1 ADC0809 引脚功能 .......................................................................................16
3.2 ADC0809 内部结构 .......................................................................................18
3.3ADC0809 与 80C51 的接口............................................................................19
3.4 ADC0809 的应用指导 ...................................................................................20
3.4.1 ADC0809 应用说明 .............................................................................20
3.4.2 ADC0809 转换结束的判断方法 .........................................................20
3.4.3 ADC0809 编程方法 .............................................................................21
第四章 硬件设计分析................................................................................................22
4.1 电源设计........................................................................................................22
4.2 关于 74LS02,74LS04..................................................................................22
4.3 74LS373 概述 .................................................................................................23
4.3.1 引脚图.........................................................................................................23
4.3.2 工作原理...............................................................................................23
4.4 简易数字电压表的硬件设计.........................................................................24
结 论..........................................................................................................................25
参考文献......................................................................................................................26
附 录........................................................................................................................27
致 谢........................................................................................................................29