1、基准电压2.5v,AINN输入2.5v直流恒定电压,AINP摆动范围在0~5v,当AINP输入直流电压为2.5+1.25=3.7v左右 ,adc输出数据为68c521已经接近7FFFFF,电压加到4v左右出现输出出现负值,非7FFFFF
不应该时AINP输入电压为5v时才会满量程7FFFFF吗?还有就是电压超过量程后应该是一直输出7FFFFF,实际却是负值?
2、采集波形异常,下图1是示波器测量AINP处的信号波形,图2是ADC实际采集到的波形,发生畸变
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
1、基准电压2.5v,AINN输入2.5v直流恒定电压,AINP摆动范围在0~5v,当AINP输入直流电压为2.5+1.25=3.7v左右 ,adc输出数据为68c521已经接近7FFFFF,电压加到4v左右出现输出出现负值,非7FFFFF
不应该时AINP输入电压为5v时才会满量程7FFFFF吗?还有就是电压超过量程后应该是一直输出7FFFFF,实际却是负值?
2、采集波形异常,下图1是示波器测量AINP处的信号波形,图2是ADC实际采集到的波形,发生畸变