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DAC1280的比特流怎么理解

Other Parts Discussed in Thread: DAC1280

关于DAC1280这个芯片的1s density modulation怎么理解。我的理解:1S不断的往TDATA引脚输入高低电平,根据1S内传输的比特流中1占得比重来输出一个对应的电流。这样的话根据采样定理,按照一个周期10个点的要求,是不是只能输入0.1Hz的正弦波。不知道我的理解是否正确?