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用F28035对1.5v进行采样,发现结果波动较大,如下图,最小值到最大值相差约100. 误差有2.4%(采用内部参考,尝试过延长采样保持时间,都是一样的波动范围)。请问在采用内部基准的情况下,精度一般可以做到多少?