MSP430G2553采样电池电压，电池不充电时，测量准确为2.25V，给电池充电时，测量就偏高，刚一充就变成2.7V，啥原因啊，怎么办呢。补充下：我是恒流充电的。基准源用的外部3.3VLDO.直接采样没有分压电阻。ADC引脚处加了个10uf和0.1uF电容。谢谢！！
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