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ADS1112差分输入16位,负值0到-130之间存在转换死区,其余部分转换正常

Other Parts Discussed in Thread: ADS1112

ADS1112差分输入16位,负值0到-130之间存在转换死区,其余部分转换正常,更换分辨率故障现象一样。将输入极性调整为正输入,则结果正确,不知是何原因。输入端一端对地电压为2.42V,另一端对地2.5V。