Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

  • State TI Thinks Resolved
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 32 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

SN65DSI83: Decoupling and bulk capacitors for VCC and VCORE pins

Egemen Aksoy
Intellectual 445 points
Part Number: SN65DSI83

Tool/software:

Hello,

In our HMI project, we decided to use SN65DSI83 for MIPI to LVDS bridge converter. 

In the datasheet, there is a sentence for the VCC and VCORE pin decoupling capacitors.

However, the capacitors on the eval board are selected as shown in the attached image.

According to the datasheet and the eval board, which design would be more reliable?

For the VCORE pin, is the minimum value of 1u the derated value, or do you recommend a larger value instead of 1u?

Best regards,

Egemen Aksoy

  • 0
    TI__Mastermind 22035 points

    Hi Egemen,

    The capacitors use in the EVM were tuned to remove the power supply ripple on our board. These values will vary from board to board. The recommendation of 100nF per pin is a general rule of thumb.

    I recommend going with the 100nF per pine and including one bulky can (10uF) and one smaller cap (10nF). total of 7+2 caps

    For VCORE 1uF should be enough