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mcu的电源设计

Other Parts Discussed in Thread: MSP430G2553

MSP430G2553,AD10功能用的电源电压3.3V,板子上有个2.4V的电池,然后怎么设计单片机电源电路,推荐的IC有么?之前试过电荷泵ic,AD转换结果不理想,有偏差还不稳定,后去掉电荷泵,接到外部稳压电源3.3v,ad转换结果较准确,不知设计用啥电源好,谢谢!