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ADS1253采样电压偏大0.1V

Other Parts Discussed in Thread: ADS1253, LT1009

目前用ADS1253调试的时候,发现采样电压比实际电压一直大0.1V。 采样电压0V的时候,输出0.1V,采样1.6V电压输出1.7V。

我的基准电压是LT1009供的,采样电压是经过运放跟随然后到ADS1253的CH1+/CH2+的,电路如附件,各位帮我看下是什么问题,谢谢。