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hucklord's avatar
hucklord
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4 years ago

DE1 SOC oscillator

I'm working with a high quality ADC that needs a low jitter, low noise clock source. My question is: what are the specs of the internal 50MHz oscillator of the DE1-SOC? I'm looking for crystal oscill...
EngWei_O_Intel's avatar
EngWei_O_Intel
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4 years ago

Hi there

There are some variations in the internal oscillator frequency because of the process, voltage, and temperature (PVT) conditions.
If you need a precise frequency for operation you must use an external reference such as a crystal oscillator based device or a known accurate frequency source.

Thanks.

Eng Wei

  • hucklord's avatar
    hucklord
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    4 years ago

    Thanks for the reply. Isn't that the case for any oscillator? A datasheet would normally list the frequency variation, jitter, phase noise, etc., where can I find the datasheet for the oscillator inside the DE1-SOC?

    • EngWei_O_Intel's avatar
      EngWei_O_Intel
      Icon for Frequent Contributor rankFrequent Contributor
      4 years ago

      Hi there

      The drift is per device basis. There is no specification published on how much it will drift across PVT (process, voltage, temperature). But it would not fit for accuracy requirement.

      Thanks.

      Eng Wei