Other Parts Discussed in Thread: LMH6629, LMH6517, LMH6518
I would like some feedback in order to choose the best signal path for the following:
Input signal is single-ended 5-100MHz, with amplitude ranging over 300uVpp and 300mVpp.
I want to drive a differential ADC 2Vpp.
Noise performance is most critical issue here.
I had thought of using the LMH6629 in a gain of around 20 followed by both halves of the dual LMH6521 in series.
Using dual VGA will give me a variable gain over the 60dB that I need, and using a low noise gain block prior to VGA should render the noise of the VGA less significant.
In addition, are there any recommendations for driving LMH6521 by single-ended signal?