I have a design which uses a ADCLK944 to provide fanout for local oscillator to two AD8347's and two AD5385's in the frequency range 900-2200MHz and all powered at 3.3V. All of the components are on one PCB and maximum track length is around 60mm from each device to the ADCLK944.
I want to use a 2 layer PCB and I am looking for the best way to route and terminate each circuit.
My intention is to use two 50ohm tracks (+ & -) from the ADCLK944 directly to each input differential pair.
I note that the ADL5385 has 50ohm impedance inputs, would I need to use (100n) DC blocking capacitors?
The AD8347 I would use 100pF series capacitors in each track and a 200ohm shunt resistor all at the AD8347 end of the track.
Any comments appreciated.