OPA128: What is the Theta JC?

Gabriel Karlick

Part Number: OPA128

What is the Theta JC of part OPA128? The datasheet indicates 200 C/W for Theta JA only. To be more specific, I am only concerned with OPA128SM.

over 6 years ago

0 Dennis Goeke over 6 years ago

TI__Genius 11135 points

Gabriel

It's not stated explicitly but can be inferred from the Notes section of the Absolute Maximum Ratings table on page 3.
Theta CA is shown as 150 C/W and Theta JA is 200 C/W so Theta JC should be 50 C/W.

Regards
Dennis

0 Gabriel Karlick over 6 years ago in reply to Dennis Goeke

Prodigy 40 points

Thank you Dennis. I did not know that the difference between Theta JA and Theta CA is equal to Theta JC.

0 Gabriel Karlick over 6 years ago in reply to Dennis Goeke

Prodigy 40 points

Dennis,

Is there a way to calculate max Tj from the datasheet as well? I'm working on a derating spreadsheet and require that spec.

0 Dennis Goeke over 6 years ago in reply to Gabriel Karlick

TI__Genius 11135 points

Gabriel

That's in the same Absolute Maximum Ratings table: 175 degrees C.

Regards
Dennis

Amplifiers

Amplifiers forum

OPA128: What is the Theta JC?