用ADuC7061采集0~20mV的差分信号输入，如果输入1.02mV,ADuC7061转化过来的差不多也是1.02mV,但是运行一段时间之后,ADuC7061转化过来的数值会突然之间掉下去，大约降低了0.3mv，但是信号源没有变，信号源是通过RC连接到AD0和AD1上的
groupUrl: https://ez.analog.com/cn/aduc/aduc7xxx/
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