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使用INA121遇到的问题

Other Parts Discussed in Thread: INA121

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,