Dear Sir/Madam, community members.
Could you please comment on the following?
We are currently using a HMC981LP3E to bias a HMC465LP5
Vdrain = 8V @ 160mA
-Vg1 =0 to -2.5V
+Vg2 = 1.5V
We are using two linear regulators to supply VDD at 8.8V and VDIG at 3.3V
Please see circuit below:
1) Could you please suggest a "load circuit" that could be used to test the function of the HMC981 in the absence of an HMC456?
2) We measure a voltage of 7.93V on the VDIG pin, this seems to be coming from the VDIG pin even though one would expect his to be a input pin.(the 3.3V regulator works fine but being a series pass device it has no means to "pull" an too high voltage on its output low.)