• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 256 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.

ADS1274 help me!!

Martin Emmanuel Sanchez
Prodigy 10 points
Other Parts Discussed in Thread: ADS1274, ADS1278

Hi! I'm Martin Sanchez from Argentina. I'm working on my thesis to be a Bioengineer. I decided to use the ADS1274 data converter because I have to process several data in short times and I think this converter is one of the best choices. Anyway, I have a question: 

Can I use this data converter at  2000 Samples per second with a 1 MHz crystal in High resolution mode?

Please help me with that because i'm on the final stage of the circuit board design and i can't go on if a can't answer this.

Thank you for the time and attention.

Martin E. Sanchez

Bioengineer-University of Mendoza 

If u like, find me on LinkedIn to keep in touch. 

  • 0
    TI__Mastermind 23235 points

    The ADS1278 is a delta-sigma ADC.  Typically the datarates for these converters are derived from OSR value, which are fixed dividers from the modulator clock.  Therefore, based on a given clock frequency, there will only be certain datarates available.  Using the data sheet as a reference:

    From Table 7, 1MHz can be a valid clock frequency provided you are within the voltage parameters shown in the table.

    However using Table 3 and Table 6 to summarize the OSR and Fmod calculations (summarized in Table 8), you will achieve ~3.9kSPS data rate.  If you want to achieve exactly 2kSPS datarate, you will need to adjust your clock frequency (within the limits).