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关于高频采样芯片选型的问题



我想请教一个问题,就是我想要测量一个桥式电路的开关管的电流有效值,开关频率是1MHz,也就是需要在1us的时间内采样几十次,然后将数据保存并传输进DSP,之后进行下一次采样。我现有的DSP芯片(28379D)的ADC采样频率不够,请问我可以用什么芯片进行采样并将数据传输进DSP进行处理呢,求各位大神解答