• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 369 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.

Original question:

DS90UB954-Q1: GPIO pull down resistance(min-max) and GIPO state at power down

DS90UB954-Q1: Mode/IDX resistor using E24 series resistors

Takuma Ito
Expert 5200 points
Part Number: DS90UB954-Q1

hello, Is it OK to use E24 1% series resistors instead of recommended value in datasheet?  In this case exactly same value cannot be chosen. 

If this is not recommended, is it OK to create same value resistance by using multiple E24 1% resistors in series? 

  • 0
    TI__Guru** 103215 points

    Hello Ito-san,

    It is recommended only to use the E96 1% resistances from the datasheet in order to ensure that the voltage selection will be reliable across all tolerances of the IC, resistor, and temperature. I would not recommend using E24 resistors or multiple E24 resistors (which means compounding tolerances) in order to generate the value. 

    Best Regards,

    Casey 

  • 0 in reply to Casey McCrea
    TI__Expert 5200 points

    Hi Casey, 

    In the "Figure 43. Typical Connection Diagram Coaxial With Internal 1.1-V LDO in datasheet,  there are capacitors at IDx and MODE. can you tell me what is purpose of these caps? 

    ito 

  • 0 in reply to Takuma Ito
    TI__Guru** 103215 points

    Hello Ito-san,

    These are used to filter out AC noise on the pins due to EMI or other coupling sources in order to ensure that the voltage at the pin is stable and matching the target voltage. 

    Best Regards,

    Casey