ADuM1440'S Data Sheet ,Table 18 shows . Maximum Continuous Working Voltage1
I want to know that table18's guarantee is under Tj<150 ℃ （useing table 17 condition)?
or limited condition?
The short answer is yes.
Our insulation lifetime is what determines our working Voltage. Hot is not the worst case condition that determined that lifetime.
Thank you Very much MSCantrell.
Yes, application is Intrinsic Safety,Smart valve positioner.It's need insulation between 2 power supply circuits.