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ADS1112模拟通道无法正确选择和差分,单端输入问题

Other Parts Discussed in Thread: ADS1112

我的ADS1112只能在单端模式下采集到AN0输入端的电压数据,无论我怎么配置控制字,采集到的数据都为AN0通道数据,配置控制字确实改变了,用在线仿真看的,刚开始以为片子坏了就换了个片子,还是和原来一样,请问这是怎么回事?谢谢