We are using the HMC465LP5 in our application; the bias to the device is provided by the HMC981 as per the recommended application circuit in the HMC981 datasheet.
For our application, Vdd ~ +7.70V. I have a sample of 4 units, and I have noted that one of the gate voltages VGG2 is +3.09V. This is outside its recommended maximum of +3V; further, the other 3 units have VGG2 with values that are ~ +1.6V.
My question: Should I be concerned if VGG2 exceeds the specified maximum? Should I be looking for a defect in the bias circuit, or perhaps is the HMC465 oscillating?
It just seems strange to me that 1 unit is behaving markedly different than the other 3 units.