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Altera_Forum's avatar
Altera_Forum
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14 years ago

Max V static VCCINT current higher than expected

Hi,

Has anyone else experienced higher than expected static current consumption on the VCCINT supply for Max V devices?

I am prototyping with the 5M240ZT100C5N part. The PowerPlay analyzer says I should have about 0.02mA of static VCCINT current. However, I am measuring more like 4.5mA. Dynamic current is as expected.

Nothing else is connected the 1.8V regulator. I am wondering if these devices are meeting their static power spec.

Thanks,

Tyler

3 Replies

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

    Do you have floating inputs or inputs with pull-up connected to ground?

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

    Hi FvM,

    Thanks for the response.

    No floating inputs or grounded pull-ups.

    Also, this high static power consumption is for 1.8V Core power supply.

    Regards,

    Tyler
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    --- Quote Start ---

    Also, this high static power consumption is for 1.8V Core power supply.

    --- Quote End ---

    Yes. The pull-ups won't matter. Floating inputs could cause oscillations that also effect the idle current.

    You should ask Altera support.