• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 35 subscribers
  • Views 235 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.

TRS3221E: The Impact of Changing Capacitance

DDdoor
Expert 2435 points
Part Number: TRS3221E

Tool/software:

Hello,

I believe the TRS3221E can operate with either 3V or 5V VCC.

Section 9.3 "Design Requirements" of the datasheet specifies capacitor values for both VCC=3V and VCC=5V.

A customer is considering temporarily changing VCC from 3V to 5V in their design.

Currently, capacitors C1, C2, C3, and C4 are connected with 0.1uF for 3.3V operation.

What effects would occur if only VCC is changed to 5V?

Best regards,
DDdoor

  • 0
    TI__Mastermind 27960 points

    Hi DDdoor

    Please expect a delay of response due to US holiday. Our expert will get back to you by early next week.

    Regards,

    Sean

  • 0
    TI__Genius 15321 points

    Hi DDoor,

    Thank you for your question. Yes, as you have noticed the recommended capacitor values are listed in section 9.3. They are also quoted under the "test conditions" footnotes in several places, indicating that "C1 = 0.047 μF, C2–C4 = 0.33 μF at VCC = 5 V ± 0.5 V." For the datasheet parameters to be guaranteed at 5V, the customer would just need to swap these cap values.

    Regards, Amy