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介绍了一种通过外接12位AD转换器AD7858来提高DSP采样精度的新方法。给出了AD转换器AD7858的主要特性、引脚功能及其与DSP的连接方法,同时给出了用该ADC和DSP完成数据采集的软件程序。
A new method to improve DSP sampling accuracy by introducing the AD7858 12-bit AD converter is introduced. The main features of the AD7858 AD converter, the pin functions and the connection method with the DSP are given. The software program for data acquisition with the ADC and DSP is given.