题 目：基于 51 单片机的简易数字电压表的设计系 部：专 业：班 级：学生姓名：学 号：指导老师： 日 期：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.......................................................................................................91．1A/D 转换原理.................................................................................................91．2 ADC 性能参数.............................................................................................111．2．1 转换精度.........................................................................................111．2．2. 转换时间........................................................................................121．3 常用 ADC 芯片概述....................................................................................13第二章 8OC51 单片机引脚........................................................................................14第三章 ADC0809........................................................................................................163.1 ADC0809 引脚功能........................................................................................163.2 ADC0809 内部结构........................................................................................183.3ADC0809 与 80C51 的接口......................................................................
