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1、信号源为Vout和GND，Vout对GND可以为正也可以为负，范围在±300mv左右。是否可以利用伪差分的方式通过ADS1256进行采集？精度要达到0.01mv，是否可以通过降低采样率来达到精度要求？
2、是否有更好的ADC芯片推荐？
