The HMC943APM5E is a four stage, gallium arsenide (GaAs), pseudomorphic high electron mobility transistor (pHEMT), monolithic microwave integrated circuit...
HMC943APM5E on Analog.com
What is the best way to terminate the VDET and VREF pins if the detector circuit is not being used?
Is it OK to connect these pins to ground? Or must they be left open, not-connected?
A good amount of our customers leave these pins open and this has not posed a problem. This is the most common configuration if these pins are going to be unused.