STM32 spi采集ADC128S022误差很大,下面是我的记录值和误差,怎么减小误差
STM32 spi采集ADC128S022误差很大,下面是我的记录值和误差,怎么减小误差,怎么每变化一个参考电压值,复位一下串口打印值, 实际电压mv 误差mv 测量mv789.9 161.956763 627.943237mv
1117.3 70.727856 1046.572144mv
1585.5 120.299072 1465.200928mv
1683.5 8.984619 1674.515381mv
1877.5 -6.329834 1883.829834mv
2100.4 7.255713 2093.144287mv
2294 -8.45874 2302.458740mv
2520 8.227051 2511.772949mv
2723 1.912598 2721.087402mv
2929 -1.401855 2930.401855mv
3144 4.283691 3139.716309mv
3336 196.283691 3139.716309mv
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