使用28335内部基准源与使用外部基准源在AD转换精度上会有多少偏差?
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内部的参考源温漂是50ppm,具体精度没有提到,但它属于带隙参考源,精度应该是很高的.
外部参考一般推荐使用REF30xx,精度是0.2%的样子,也是50ppm,可以认为是差不多的