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ADS1298: 当RL脱落时,无法检测其它导联是否脱落?

Part Number: ADS1298

通道配置如下:

CH5P、CH6P、CH7P、CH8P配置了上拉DC脱落检测;

2.4V双电源供电;

当接入RL时,电压为0V,INP连接时,电压为0V;INP脱落时,电压为1V。
当不接入RL时,电压为-2.2V,INP连接时,电压为1.4V;INP脱落时,电压为1V。
所以RL脱落时,无法检测其它导联是否脱落?

如果是配置错了,排查方向是什么?