专家好,最近用数模转换DAC5670这个芯片,当DA输出波形频率超过300M时,不同频率的波形的幅值(峰--峰值)会有不同程度的衰减(使用差分示波器测的而且输出的波形频率越高,幅度衰减的越厉害,请问这是由于芯片本身的特性产生的,还是别的什么原因呢?请帮忙解答,谢谢
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