Cyclone 10 GX Internal TSD - Temperature offset

[Godfrepw]

We have a couple of designs that use Cyclone10GX. On both we use the Internal Temperature Sensing Diode (TSD) IP to monitor the die temperature. Up to now this has worked well and seems to give a believable reading that is typically a few degrees C higher than the external case temperature. However, we have started to notice some boards that have a significant offset in the temperature from the expected. This varies but can be up to 10 to 15 degrees higher than expected consistently across the temperature range. In all other respects the boards work fine with normal device case temperatures and power consumption.

Is there a known issue with the Internal TSD of the Cyclone10GX?

Any other possible explanation?

Thanks.

[Farabi]

Hello, before we can provide support, could you please explain why your account have tagged - Do Not Use- Duplicate Account? 

Please use correct account to get technical support. 

regards,

Farabi

[Fakhrul]

Hi Godfrepw,

I wish to follow up with you about this case. Do you have any further questions on this matter? Please feel free to let me know if there is any concern so that we could further assist you. 

Otherwise, this thread will be marked as inactive and will be transitioned to community support because there is no update received from you in a while.

Thank You.

Regards,

Fakhrul

[Fakhrul]

Hi Godfrepw,

I wanted to follow up on this case to check if you have any further questions or concerns. Please feel free to reach out if there's anything you'd like us to assist you with.

If we do not receive any updates from you soon, this thread will be marked as inactive and transitioned to community support.

Thank you for your understanding.

Best regards,

Fakhrul