Post Go back to editing

What is optimum load impedance of ADL5562 ?

We are using ADL5562 in our design as driver for AD9467.

I have downloaded S-parameter of ADL5562 and I have simulate in ADS using input termination as 40.2 ohm on each input.

As per datasheet of ADL5562 gain is 15 dB when load RL = 200 ohm but I can able to get only 9 dB. But when I use RL=6 ohm I can get gain as 15 dB.

What RL should I consider for designing anti aliasing filter for ADC ?

RL will be input impedance for anti aliasing filter.