对应64脚封装的PIN10和PIN20,如果不使用PGA,是否可以悬空?还是必须接入VSSA?
电压范围手册上是-50~200mV,电压范围并不大,看起来接入VSSA更安全一些,PGA_GND接入200mV以上的电压,是会损坏还是仅仅得到不正确的采样结果?
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