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AD转换器校准

Other Parts Discussed in Thread: ADS1259

最近调通的ADS1259这个芯片,但是看了一下校准这块,还是有一些不明白。

1、校准是输入信号是0或者full-scale,offset calibration对应0、full-scale calibration对应full-scale

     理论上,我的full-scale应该是±2.5V,应该﹢2.5V还是-2.5V呢?

     而且我也很难给到准确的2.5V,这样会影响校准吗?

2、不同DATA RATE需要重新校准还是说只要校准一次就够了,因为数据手册上校准步骤里边没有说要设置DATA RATE,但给出了每种DATA RATE的校准时间。