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关于CC2640R2F的ADC检测

Other Parts Discussed in Thread: CC2640R2F

各位大侠好

最近我遇到一个问题,当CC2640R2F的供电电压恒定为3.6V时,我要让它检测电池输出的直接电压

(电池电压范围为3.7-4.2V,我已使用线性稳压器让CC2640R2F的驱动电压符合标准),但为何

CC2640R2F在电池电压在4.05V以上时,无法准确检测?其ADC引脚接收到的电压只能达到最高4.05V,

不过手册上却写的是ADC能够检测0-4.3V范围。不知原因何在?

谢谢