• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 382 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.

ADS131E04 data read out

Raphael Mosig
Prodigy 140 points
Other Parts Discussed in Thread: ADS131E04

Hi,

I've got a question to the ADS131E04. In my application I would like to run the ADC at its highest sampling rate of 64 kSps (due to the short settling time) but would like to repeatedly read the ADC via SPI just with 1kHz. Now I noticed that there is this /DRDY pin. Unfortunately the datasheet is not fully clear to me. Does this /DRDY pin really need to be forwarded to the SPI master? For my understanding this pin is actually not necessary (for my application) since the ADC just shall convert as fast as possible (with 64 kSps) and I would like to read every 1 ms the latest converted value from the ADC. Or is my approach totally wrong?

Thanks a lot in advance!

  • 0
    TI__Mastermind 23235 points

    The DRDY pin indicates that a new data is ready to be readback.  In theory, you don't need the pin, however there is a a risk of being/getting out of sync with the ready if you are not using the pin.  For example, you can use a timer as you seem to indicate, but if you are not synchronized to the DRDY pin, you may be slightly off on the timing, and therefore eventually and periodically you would miss a sample; which may or may not be a concern for you.