做一个压力传感器信号放大,压力传感器是四壁电桥结构的,所以用了差分放大器,传感器输出两脚在2.74v和2.67V,INA121是3.3V单电源供电,不接传感器,输出是3.3V,接了之后还是3.3v,没变化,
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.
输出饱和了吧,增益电阻Rg=2K,那么增益G=1+(50K/2K)=26。 5V供电的话,最大输出为4.1V左右,经过26倍的增益之后,那么最大的输入信号幅值在4.1V/26=158mV左右。