In Mixer HMC689 is it necessary to apply 2.8V for a good performance of the mixer? It says external optional bias but then says to apply 2.8 for nominal performance so I am confused with the information. In the evaluation board there are two open pads in the routing of this net, is it for applying a drop in VCC to 2.8V?
Is it also possible to provide the S Parameters of this mixer? Analog Devices provide them for HMC688 (almost similar) but not for this one.
Thank you for your time,
Apply 2.8V to G_bias will get you performance shown in datasheet plots. We recommend you to use this setup but you can play with it to see change in performance and find the most suitable condition for your application.
Due to limited equipment and resources, we don't have s-parameter handy, please allow some time for us to get the s-parameter. Regards.