ISO1212: what is the test condition when testing the ISO1212 temperature rise in the EVM board

Liang Hui

Prodigy 40 points

Part Number: ISO1212

Hi ISO team,

I saw the ISO1212 temperature rise picture shown in below from the ISO1212 datasheet in the first page.

We can see ISO1212 chip surface temperature is about 45°C.

May I know what the test condition is?

The Condition I mean is like that

" Input voltage is 60V or 24V? "

"What is the Current limit value?"

Thank!

over 3 years ago

0 Manuel Chavez over 3 years ago

TI__Genius 17100 points

Hi Liang,

Thank you for you interest in ISO1212, and welcome to E2E!

As written in the title page of the ISO1212 datasheet, additional information regarding the comparison between traditional digital input solutions and solutions using ISO121x devices can be found in the How To Simplify Isolated 24-V PLC Digital Input Module Designs (SLLA370B) application brief.

Please refer to this document, and let us know if you have any additional questions.

Thank you,
Manuel Chavez

0 Liang Hui over 3 years ago in reply to Manuel Chavez

Prodigy 40 points

Hi Manuel,

I have read the document you sharing. So the input voltage is 32V and current limit is 2.5mA, is it right ?

Thanks!

+1 Manuel Chavez over 3 years ago in reply to Liang Hui

TI__Genius 17100 points

Hi Liang,

Thank you for reading the application brief. I confirmed with the author that the comparison was done with a 36V input and resistor components chosen for Type 3 inputs (2mA min current in on state, VIH<11V) for both solutions.

Please let me know if you have additional questions or comments.

Respectfully,
Manuel Chavez

0 Liang Hui over 3 years ago in reply to Manuel Chavez

Prodigy 40 points

Thanks for your help!

Isolation

Isolation forum

ISO1212: what is the test condition when testing the ISO1212 temperature rise in the EVM board