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ADS5204无法工作,请教一下大家



我想用ADS5204转换视频信号,一直不工作,我是用单片机给的40MHz时钟(是个正弦波),写了控制字,还拉低了其他几个数字输入的管脚。不知道是不是时钟需要方波,还是需要把这个时钟的均方值、峰峰值等调到ADS5204需要的范围呢?还是其他的问题?