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ADS1292R: Can't get ECG Wave continously in ADS1292R

Dinu
Intellectual 335 points
Part Number: ADS1292R
Other Parts Discussed in Thread: ADS1292

Hi  folks,

I am currently developing in ADS1292R IC , i have configured and got the ECG waveform output , The issue is , whenever i turn off from plug point , and turn ON again  Am not getting ECG wave  where as , when i reset the controller no issue, kindly clarify this isssue asap,

Furthermore, i have some questions regarding ADS1292R IC

1. What is the bootup time for ADS1292R

2. Delay time between Write commands

3. Data ready low- time width

4.Data Frame  of ADS 1292R ---- Whether is it 9 bytes long? or extra

Thanks and Regards,

Dinu

  • 0
    TI__Intellectual 2885 points
    Hi Dinu,

    1. The boot-time is explained in the Power-Sequencing Section on page 62 in the datasheet . Where

    tMOD = 4 tCLK for CLK_DIV = 0 and tMOD = 16 tCLK for CLK_DIV = 1

    2. The delay for the write command is effectively zero. when the SCLK is 1 MHz one byte takes 8 uS. and as long as one byte is longer than the t_SDECODE (7.8125 uS) the data will continue to go without having to add any delay.

    3. Pg. 29 talks about DRDY and how it is used in RDATAC and RDATA modes. The width of DRDY depends on SCLK

    4. You are correct it is 9 bytes long. First word, channel 1, channel 2 (each 3 bytes)
  • 0 in reply to Matt Mendez
    TI__Guru**** 180961 points
    Hi Dinu,

    Can you also let us know what hardware you are using? Is it our ADS1292 evaluation board or is it one of your own design? I'm assuming 'turn off from plug point' means that you are disconnecting power from the ADS1292 and whatever micro-controller you are using to interface with it.