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基于AT89C2051的AD转换.doc

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学 士 学 位 论 文 基于AT89C2051的A/D转换 的设计与分析 姓 名: xxxxx 学 号: xxxxxx 指导教师: xxxx 院系(部所): 光电工程学院 专 业: 电子信息工程 完成日期: 2013年月日 摘 要 A/D转换是指通过单片IC芯片将模拟输入信号转换成N位二进制数字输出信号的过程。A/D转换器发展30年,经历了很多次的技术革新,因此它具有多种使用型,分别是:逐次逼近型、积分型、并行比较型、压频变换型、流水型等。正是因为转换器拥有多次使用型,所以需要通过多种指标分析,将物理结构的设计与实际性能结合比较,总结出各自适合的应用领域。 AT89C2051是一个2k字节可编程EPROMDE的高性能微控制器。它是业界标准MCS-51指令和引脚兼容的,所以它是一个功能强大的单片机,为其许多嵌入式控制应用,提供了一个高度灵活和有效的解决方案。 本文中主要应用AT89C2051的以下几个特点:2K字节的EPROM,128字节RAM,15根I / O线,2个16位定时器/计时器,内带精密模拟比较器,4.25至5.5V的工作电压范围,并且还具有两个程序存储器锁定,掉电和时钟电路。其中AT89C2051的精密模拟比较器是重点,并以它来实现A/D转换电路的。 本文应用逐次逼近型A/D转换器的模式组成精度高、速度快、廉价的A/D转换器,实现A/D转换的电路简单 Abstract A/D conversion refers to the analog input signal into the process of N binary digital signal output. The A/D converter 30 years of development, has experienced technical innovation many times, so it has a variety of uses, respectively is: successive approximation, integral type, parallel comparison, voltage to frequency conversion type, water type etc.. It is because the converter has used many times, so we need to analysis through a variety of indicators, will design the physical structure and the actual performance with comparison, summarizes the application field for each of the. AT89C2051 is a 2k byte programmable EPROMDE high-performance microcontrollers. It is the industry standard MCS-51 instruction and pin-compatible, so it is a powerful microcontroller, its many embedded control applications, provides a highly flexible and efficient solutions. This paper mainly has the following characteristics AT89C2051 Application: 2K bytes of EPROM, 128 bytes of RAM, 15 fo I / O lines, two 16-bit timer / timer, which with precision analog comparator, 4.25 to 5.5V The operating voltage range, and also has two program memory locking, power down and clock circuitry. Which AT89C2051 precision analog comparator is the key, and use it to achieve the A / D conversion circuit. In this paper, the realization of the successiv
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