TDC7201: part operation temperature

Adam Dupuis17

Part Number: TDC7201

Hello,

The Datasheet indicates an ambient max temperature of 85 C and a max Junction of 85 C. Usually the junction is higher than the ambient. The absolute Max junction is 125C.

1. Did TI intentionally rate the recommended junction temperature as 85C or should this be 125C?

2. in our application the ambient can be 85C but the PCB can also be higher. What is the maximum Junction the device can safely operate at?

Looking at other components Junction temperatures are usually much higher than 85C usually max 100 to 125C with no issues.

Thanks

Adam

over 7 years ago

0 Scott Cummins over 7 years ago

TI__Mastermind 31655 points

Hi Adam,

To my knowledge the datasheet has the correct junction temperature rating, and that 85C is the maximum junction temperature at which the device is guaranteed to meet the rest of the specification.

Regards,

0 Adam Dupuis17 over 7 years ago in reply to Scott Cummins

Prodigy 150 points

So then TI doesn't recommend operating the Junction above 85C? Does TI have data on what would happen if the junction was operated at 90 or 95C?

0 Adam Dupuis17 over 7 years ago in reply to Adam Dupuis17

Prodigy 150 points

Also how can the datasheet list the Max Ambient Temp at 85C and then the max Junction at 85C? Any power dissipation will cause the Junciton to be higher than the ambient. Package thermals are extremely terrible. Theta JA is 155 C/W so even at 9 mW(TDC running) of power there will be a 1.4 C rise...

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TDC7201: part operation temperature