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PGA280输入开关网络如何检测输入线路的开路或断路?信号完整性检测

Other Parts Discussed in Thread: PGA280

如图所示 ,PGA前端是我被测量的信号,看PGA280的手册说可以检测输入信号的断路和开路,意思是分别可以检测输入两条线有一条线断开,以及检测输入两条线都断开这两种情况,现在不知道这个开关网络怎么配置才能完成这个检测功能?另外开关网络配置完成检测功能以后,从哪些状态能判断有一条线断开或是两条线都断开?从寄存器读取数字状态还是直接读取PGA输出的模拟信号来判断?