OPA657: Exposure to High Heat for Extended Period of Time

Antonio Fadhel

Part Number: OPA657

Our customer's vendor accidentally vacuum-baked a board assembly containing the OPA657N at 150C for 16 hours. Abs max storage temp for the device 125C but Tj is 175C. Could this exposure have damaged the devices? If so, any idea on which parameters would most likely be affected?

I assume this violated storage temp abs max and effect might be unpredictable, but due to the higher Tj spec would like to confirm.

Thanks,
Antonio

over 8 years ago

0 Antonio Fadhel over 8 years ago

TI__Genius 9410 points

Hi Team,

Can you please provide feedback?

Thanks,
Antonio

0 Rohit Bhat over 8 years ago in reply to Antonio Fadhel

TI__Genius 15975 points

Hi Antonio,

I am checking to get an answer to your question. I will get back soon with a reply.

Best Regards,
Rohit

0 Antonio Fadhel over 8 years ago in reply to Rohit Bhat

TI__Genius 9410 points

Pasting product team response for reference:

I think this “incident” is no problem at all. The Storage Temperature guidelines are designed to avoid degradation over a >10-year life (100,000 hours). Further, 150C is below the mold compound Glass Transition Temperature.

Unpowered storage at 150C for 16 hours is a “trivial” event and I would not be concerned.

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OPA657: Exposure to High Heat for Extended Period of Time