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ADC的矫正电路是为DSP提供两个已知的参考电压,那如果引脚ADCREFP和ADCREFM为输出,那这两个引脚可以连接至ADCINA0和ADCINB0,作为矫正算法的参考电压吗?
就我个人的使用经验来说,不建议用内部参考电压,因为2812的设计原因,参考电压不标准会有15%的误差。可以使用两个外部电压基准接到ADCINA0和ADCINB0,采用矫正算法可以将误差降到1%以下