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ADS1178: ADS1178差分输入设计成单端输入

Part Number: ADS1178

ADS1178是8通道差分输入,现在用这芯片进行单端输入设计,N与信号地直连可行嘛?望大佬给指点指点下

  • 您好,

    可以单端输入,AINN可以与地连接,但是AINP输入需满足差分输入范围,比如VREF=2.5V时,AINP的输入范围是0~2.5V,否则的话,就超出了差分输入范围±VREF,即±2.5V;

    或者说AINN接地时,其差分输入范围变为0~VREF了,不能有负极性信号输入了。