Part Number: LMX2595
Hello community,
We are working on a board that requires the LMX2595 to generate a single-ended 17 GHz signal. This single-ended 17 GHz signal needs to be used by two independent "load" circuits. We have two options:
Option A: Use the RFoutAP to generate the 17 GHz signal. Pull up and terminate the RFoutAM port. Split the output from RFoutAP into two and feed the two "load" circuits. The problem with this approach is that the splitter will lead to a 3 dB loss, and the drive power will not be enough for the two "load" circuits. We have verified this by performing tests on the LMX2595 EVM. So, we can eliminate Option A.
Option B: Use RFoutAM and RFoutAP "independently" to drive the two loads. Yes, there will be a 180 degree phase shift, but this is not a problem for us. The two loads will present a 50 ohm impedance, but they might not be perfectly matched. We will never have a case where one of the loads is open, or is shorted, but it might be the case that the two loads present slightly different impedances (but still, close to 50 ohm).
The question is this: What should the matching circuitry on the output of the LMX2595 look like? Can we simply use the circuitry in the LMX2595 evaluation board schematic (attached here; look at the top-right side of the PDF), or should we use a different circuit to connect the LMX2595 to the two independent loads?
Your advise would be greatly appreciated. Thank you!
Best regards,
Aditya(Please visit the site to view this file)