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DP83848K: Regarding AVDD and IOVDD

Masanori Tachibana
Genius 5350 points
Part Number: DP83848K

Dear support team,

I have some questions about DP83848K.

I can not read the following from the datasheet.
1. Can I understand AVDD = IOVDD = VCC in the data sheet?
2. Is it OK to supply AVDD and IOVDD in separate systems (both 3.3 V)?
3. Are there any limitations regarding the startup sequence of AVDD and IOVDD?
4. How much voltage difference is allowed between AVDD and IOVDD?

Best regards,
M. Tachibana

  • 0
    TI__Mastermind 19780 points
    Hi Tachibana-san,

    1. VCC is a generic term for any of the power supplies in the datasheet. It can mean AVDD or VDDIO.
    2. Yes it is OK for these 2 supplies to be on separate power rails
    3. No power sequencing is required between AVDD and IOVDD
    4. The delta between the two rails does not matter as long as both rails are inside of the specific range of the datasheet.

    Best Regards,
  • 0 in reply to Rob Rodrigues
    Genius 5350 points
    Hello Rodrigues-san,

    Thank you for your great support.

    I understood what you taught me.
    And your answer is very helpful.

    Thanks and best regards,
    M. Tachibana