检测一个温度,当这个传感器断开连接后,相当于ADCINB0外接了个下拉3M电阻,理想情况,ADC转换值应该是接近为0。
但实际上这个电阻上竟然有0.5xxV的电压,导致ADC转换值错误。
咨询各高手,这DSP的ADC管脚内部电路是怎样的?
如何才能检测到接近0的值?
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