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ADS1255 issue.

Henry Cheng1
Prodigy 180 points
Other Parts Discussed in Thread: ADS1255

 

I found the input of the ADS1255 coupling a frequency pulse, please see picture. I am not sure where it is from? Could you help me ? Also, do you have ADS1255 layout reference design? Thanks!

  • 0
    TI__Mastermind 43915 points

    Hi Henry,

    At what frequency are the pulses occuring? Do you have the buffer enabled for the ADC?

    Regards

    Tony Calabria

  • 0
    TI__Mastermind 44550 points

    Hi Henry,

    The frequency pulse appears to be every ~200ms or ~5Hz. I think this would have to be coming from an outside source.

    Could you provide us with more details...

    • What are you measuring in the above screenshot (where are you probing)?
    • What is connected to the ADS1255?
    • What type of testing environment is the device in, is this on a breadboard or are you using the ADS1256EVM?
    • Do you have a schematic you could share?

    Best Regards,
    Chris