1. We are using the AD8599 at ± 15V. When the room temperature is 25 ° C, device temperature is 80 ° C. Are these normal?
Hi,Can you attach your schematic to verify whether this is in normal operation. Assuming the part is operated at ± 15V supply, ambient temperature and buffer configuration. The products junction temperature should only be around 66degC using the formula:Tj = Pd x thetaJA + Tawhere:
Tj = Junction temp
Pd = power dissipation
thethaJA = junction to ambient thermal resistance
Ta = ambient temp
You can learn more about this with this article.