• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 47 subscribers
  • Views 1034 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 usage

Tsahi Tal
Prodigy 160 points
Other Parts Discussed in Thread: ADS1274

hi

I wish to use the ADS1724 with IMX6 SPI interface.\

1. can the device manage two 100KSPS for two channels in (100 each) ob TDM mode (only oned data output)?

2. can it be easily be integrated with the CPU with no special effort on the FSYNC pin?

thanks

Tsahi

  • 0
    TI__Guru* 97585 points
    Tsahi,


    Is this question for the ADS1274? I'm reasonably sure that TI does not have an ADS1724.

    If it is, I'll change the title of this post to reflect the correct device.


    Joseph Wu
  • 0 in reply to Joseph Wu
    Prodigy 160 points
    hi

    you are wright/

    ADS1274 it is.
  • 0 in reply to Tsahi Tal
    TI__Guru 66256 points
    Hello Tsahi,

    The ADS1274 can be used in TDM mode with any data rate. The only concern will be that your SPI clock (SCLK) must be fast enough to read n-channels x 24 bits of data before the next sample arrives. If you only require two channels, you should power down the unused channels and configure the device for TDM dynamic mode, which will remove the unpowered channels from the output data stream. This will allow you to use a slower SCLK if you need to.

    /DRDY and FSYNC share the same pin on the ADS1274. In SPI Mode, you will need to monitor /DRDY for a high-to-low transition that indicates when new data is ready. In Frame-Sync Mode, the period of the FSYNC signal is what determines your data rate. You must send the appropriate number of SCLKs within each frame in order to read the data.

    Best Regards,