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急：STM32 SPI采集ADC128S022误差很大，怎么减小误差

Leo Wu
Intellectual 330 points
Other Parts Discussed in Thread: ADC128S022

实际电压mv 误差mv 测量mv
4167 200.004639 3966.995361mv
3917 214.470947 3702.529053mv
3679 240.937256 3438.062744mv
3415 241.403564 3173.596436mv
3141 231.870117 2909.129883mv
2881 236.336426 2644.663574mv
2620 239.802734 2380.197266mv
2352 236.269043 2115.730957mv
2084.4 233.135474 1851.264526mv
1836 249.201782 1586.798218mv
1576.8 254.468213 1322.331787mv