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有些ADC集成了(ADS1256等)片上校准电路,可以通过寄存器配置来进行补偿,减小offset 和gain带来的error。
ADS8332没有集成self-calibration,但其实PCB 的GND处理,电源噪声,Vref的精度也都会引起ADC输出结果误差。 尽量从这些方面避免。