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ADS1248 关于AVDD输入问题(5V输入 3.3V输入情况错误 )帮忙解答下疑惑!



首先AVDD输入为5V 然后选用板内参考电压2.048V 测得温度数据比较正常  但是由于技术要求 ,选用3.3V输入时  测得值不正常  但板内参考电压我测得还是2,.048V!请问如何解决这个问题