It sounds like the internal MIM cap on the output may be damaged.
These devices are very sensitive to ESD; since ESD isn't listed on the datasheet I suspect it is Class 0.
I was unable to find any measured data on the gate current, it's very low though a few mA's at most. The bias needs to be turned on in a particular order, gate voltage first to pinch off the current, then the drain, then adjust the gate voltage…
Thank you MRichardson.
I'm still not able to find the footprints for the HMC561LP3. Do you have any clues?
Our customer need detailed layout guideline and PCB stack up guideline for the following devices.
Are Gerber files available for the evaluation board?
I have read many questions and answers about the HMC637ALP5E and various application documents.
And there are three questions:
1）The same type amplifier e.g. HMC797APM5E provides a relationship between Idd and Vgg1(Representative of a Typical D…