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I2040的SD24测量异常,

1、i2041  SD24的差分输入端接一个人电阻R= 10k,并将A-端接地,此时会出现SD24测得的电压为8mv

2、将SD24的差分输入端直接短接时,此时会出现SD24测得的电压为0.8mv

(a)以上两种情况在AFE253上不会出现。请问这是什么原因???

(b)i2041中有一个SD24TRIM Register ,这个寄存器的作用是什么???是不是SD24的输入口有偏置电流输出???

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