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DAC输出偏移了0.8V

Other Parts Discussed in Thread: DAC8832

DAC8832 之前也用过,一直没有问题。今天在调板子的时候发现输出不对了,0x0000原本输出-2.5,现在变成了-3.3V多,0xFFFF应该是2.5V,现在变成了1.7V,也就是输出往左偏了0.8V。

电源电压 参考电压都没问题,是不是反馈的运放或者DAC坏了

不知道各位有没有碰到过类似问题?