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ADS1278基准电压

Other Parts Discussed in Thread: ADS1278, OPA2350

ADS1278基准电压部分采用REF5025,在ADS1278芯片手册里REF5025输出端直接接AD未采用运放如下图 ,在ads1278的demo板里用了运放OPA2350如下图 ,用和不用区别是什么?可以不用这个运放吗?