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单独测试时DAC7612中数据不会跳变，当接入硬件电路后，刚开始写入数据时电压正常，过一会数据就变了，有事碰了一下硬件电路，DAC7612输出电压也变了，请问这是什么问题？
没有共地，或者地平面不稳定，或者受到静电的干扰等等，都有可能有影响
好的，谢谢
