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本文在分析了“抽样测试法”和“斜坡电压测试法”测试ADC性能的基本原理及存在问题以后,提出一种“可逆计数式DAC测试ADC”的方法。这种方法具有调节容易、测试准确、能对各种ADC特别是高速ADC主要性能进行测试的优点;此外,还有利于在测试系统中采用微计算机控制,达到提高ADC测试的自动化程度和效率的目的。
After analyzing the basic principles and existing problems of the ADC performance of the “Sampling Test” and “Slope Voltage Test”, this paper presents a method of “reversible counting DAC test ADC”. This method has the advantages of easy adjustment, accurate testing, and good performance on various ADCs, especially high-speed ADCs. In addition, microcomputer control is also applied in the test system to improve the degree of automation and efficiency of ADC testing purpose.