我的理解是,我可以通过设置ADS1248的IDAC1寄存器来控制电流流向指定的管脚,为什么还要用外部的开关芯片去切换恒流源的流向?
就比如说我要测AIN0 和 AIN1 两端的pt100温度传感器,我就通过设置IDAC1寄存器,使得恒流源电流从AIN0 和 AIN1 流出,
当我接了4路传感器,我就依次通过设置IDAC1寄存器来控制电流流向
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