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Altera_Forum's avatar
Altera_Forum
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11 years ago

Core voltage too high on Stratix V Gx speed grade 2

Hi,

I am using a Stratix V Gx with reference 5SGXEA7K2F40C2N.

The core voltage recommanded by Altera is between 0,87V and 0,93V (see attached below) :

http://www.alteraforum.com/forum/attachment.php?attachmentid=9494&stc=1

On my boards the core voltage measured isn't in the range : 0,99V or 1V0 depending on the boards.

This value is under the maximum ratings.

What could be the consequences ?

Thank you,

Nicolas

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    11 years ago

    Consequences - improved performance! :) while the device lasts :oops:

    The 'Recommended Operating Conditions' are named appropriately. There's a good chance you won't see any issues but continued operation at voltages over those recommended are likely to reduce the life of the part.

    Is there no way you can adjust the voltage so that it's within the recommended range?

    Cheers,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    I'm agree for life of the part.

    Some Stratix V Gx don't work (no jtag chain. The TDI in input of the FPGA is ok but there is no TDO on output) so i wonder if the too much core voltage may be related.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    It could be - it's tricky to second guess behaviour when it's being operated outside the intended operating conditions.

    Cheers,

    Alex