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关于ads1259查分输入问题

Other Parts Discussed in Thread: ADS1259, ADS1251, PGA280

如题,我仿照ads1251查分输入电路,为ads1259做了查分输入。可是测下来,该电路并不能实现理想的差分转换,不知道该怎么改才好用。板子好了,故暂不考虑使用pga280做