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CC2541ADC采样的参考电压

大家好

       最近在做电池电量的采集,遇到了一些问题。

      我想请问一下2541的参考电压如果是用电池供电的话

      随着电池电量的减少,电压值会发生变化,这里的参考电压会变化吗?

谢谢