Any idea on how to design HMC406 as single output instead of dual output?
1. Do I need to insert a 50 ohm termination for unused pin?
2. Short pin 5 and pin 6 to get single output?
Though the HMC406MS8G has two RFOUT pins (5 and 6), the two pins constitute a single RF output.
The answers to your questions are as follows:
1) Proper operation of the HMC406MS8G requires the use of both pins 5 and 6, leaving you without an unused RFOUT pin to terminate.
2) Yes, you will need to short pins 5 and 6 together to get a single output.
Please see areas highlighted in yellow in the attached excerpt from the HMC406MS8G data sheet.
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