基于串口的数模转换芯片与DSP的高速设计

High Speed Design of Digital to Analog Converter Chip and DSP Based on Serial Port

传统的数模转换芯片均为并口输出,体积大而且数率低。结合SDA5638芯片的工作原理及特点,介绍了基于SPI接口的数模转换芯片SDA5638与DSP 28335的接口与设计。我单位针对传统并口数模转换芯片在运行过程中存在的缺点和问题,首次基于DSP对高速数模转换的控制进行了研究,该研究成果对整个控制系统的运行效速度有较为明显的提升,为满足控制系统的功能需求及可靠性指标要求提供了新的方法。

Traditional digital to analog conversion chips are parallel output,large volume and low data rate.Based on the principle and characteristics of SDA5638 chip,this paper introduces the interface and design of DSP 28335 and SDA5638 chip based on SPI interface.The first control of high speed digital-to-analog conversion based on DSP can not only effectively solve the shortcomings and problems of the traditional parallel port digital-to-analog conversion chip in the operation process,but also effectively improve the operation efficiency of the whole control system to meet the functional requirements of the control system and reliability index requirements.The study is the first time based on DSP control of high-speed digital-to-analog conversion to solve the shortcomings of traditional and oral digital-analog conversion chip.The research results can effectively improve the efficiency of whole control system which provides a new method to meet functional and reliability index requirements of the control system.