In the datasheet of AD9625 are specified in Absolute Maximum Ratings (Table 6) "Operating case temperature range" and Maximum junction temperature". How is defined Tjunction? Is it Tjunction at the hot spot of the die if any or at the Diode (CTAT) voltage monitor output?
In addition, are the values measured or are they extracted from simulation? Can you detail these values?
Using the values in the datasheet (Table 7) for a quick idea:
Assuming: Tcase = Tambient = 85°C
leads to a junction temperature of Tj = 85 + Theta_jc*4 = 90.5 °C
Thanks for your feedback.