• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 328 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.

ADS129x Serial interface timing and power consumption

AM44866
Intellectual 275 points
Other Parts Discussed in Thread: ADS1298

The ADS129x datasheet shows the serial interface timing when using serial transactions that make use of commands, but I can't seem to find similar information for when the converter is operating in the RDATAC mode. Are these timing specifications published anywhere?

Also, how much additional power is consumed by an ADS129x in standby mode when it's serial line clock is toggling with CS high (vs one which the clock is not toggling)? Just wondering if there would be enough power savings to justify putting the device on it's own SPI bus.

Thanks - AM

  • 0
    TI__Guru**** 181401 points

    Hi AM,

    When you set the device for RDATAC, you will have the same timing (WRT reading data) as what is described in Figure 1 on page 13 of the data sheet.  The exception to this is that you don't need to worry about the DIN portion of the waveform.  We'll look into getting a more detailed 'RDATAC' diagram put into the data sheet.

    If the ADS1298 is in standby mode and /CS is high, it should not consume any additional power if the SPI bus is talking to some other part on your board.