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28069内部参考电压



你好,我想请问下,关于28069内部参考电压的问题,由于稳压电路的原因,输入到28069的3.3V实际可能低于3.3V,大概在3.294V左右,想请问下,如果还是采用内部参考电压,具体得到的参考值为多少。我用AD采样的和外部示波器等测量的有一定的误差,采样的值偏高了,是不是内部的参考电压不是3.3V了。谢谢。