对于上述应用，假设DAC的内部延时为300ps，容值为8pf。加上开关的8pf，总电容≈16pF。所以，对于大多数这样的应用，传统模拟开关的f3dB带宽为400MHz，虽然足以支持140Msps的信号，但DAC占用了整个系统的绝大部分裕量。 MAX4885E VGA开关大大减少了元件数量 MAX4885E是 ...

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