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求教关于ADS1262遇到的问题

Other Parts Discussed in Thread: ADS1262

最近在调ADS1262,spi通信时序用的就是之前调1248的时序,没有问题。但是在调1262的时候,对寄存器的写入不成功,设置以AINCOM作为恒流源输出,1ma电流,然而流经2.4k电阻后电压居然出现了1.44v这种数。但如果把恒流源设置的代码注释掉,就没有电压,也就没有恒流输出。求教问题到底出在了哪里?那个1.44v是怎么回事?