• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 129 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DP83867IR: Required decoupling capacitance

FarronDacus
Intellectual 780 points
Part Number: DP83867IR

Tool/software:

Pages 120-121 of the datasheet show quite a lot of decoupling capacitors used on the part, generally a combination of 1uF and 0.1uF on each with some added 10uF and 0.01uF caps as well.  Page 121 is showing a total of 30 decoupling capacitors per chip. 

Is this conservative, and if so is it known if a smaller decoupling bank can be used?  For example, can some of the larger capacitors be eliminated? 

  • +1
    TI__Mastermind 24988 points

    Hi Farron,

    The variety of decoupling capacitors are to filter a wider range of noise on the supply rails.

    The recommendation will depend on the amount of noise you expect on these rails from the supplies & environment.

    Smaller decoupling banks could be used if noise is not a significant concern in the application.

    Thank you,

    Evan