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ADS1256模块在输入电压达到3.67V以后,输出的转换结果就出现问题

Other Parts Discussed in Thread: ADS1256

请TI的专家们看一看,电压转换在3.67V以下转换正常,但是输入模拟电压超过3.67V的话,转换结果始终为3.67V左右,这是什么原因呢?ADS1256芯片的输入范围不是0~5V的吗?