What is the thermal resistance (theta jc) of the die RH1009?
Please see this link for the Theta JC for the flat pack and T0-46.
Are you asking for the Theta JC(Junction to Cap) of the "die" RH1009? So considering that the bare die doesn't have the "Cap" or packaging, this can't be spec'd in the data sheet. The RH1009 has two other packages, TO-46 and Flatpack, I'll look in to it if there is a specific Theta JC for the RH1009. I'll get back to you as soon as I have an update.
I'm trying to predict the junction temperature of the part, so any information or test data you have would be helpful. If you have the theta JC for the flatpack, I'd be interested in that as well.