目前使用ADS1258进行相关配置,模式为自动扫描模式,供电电压5.0V,参考电压为2.5V,具体配置如下:
外部开启了AIN5读取,AIN5口输入电压万用表测量为2V,实际读取到的电压为1.6V.请问这个可能是什么原因,应该从哪个方面进行排查呢?
硬件电路如下:
通过寄存器读取到的供电电压为4.95V,REF:2.488,GAIN:0.9998
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