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PPG is Random

MUHAMMAD FAYAZ KHAN
Prodigy 120 points
Other Parts Discussed in Thread: ADS1298, ADS8328, DAC7573

Dear all:

                 I have C5505 EVM and SpO2 card, my problem is

When i load SpO2.out file and start running program, placing finger in probe,

Display shows random waveform, also HR and SpO2 fluctuates a lot with HR

ranging from 60 to 240.

Any suggestion about the problem.

Regards

Fayaz

 

  • 0
    TI__Expert 4745 points

    Fayaz,

    My first reaction was that you may want to see a doctor right away!

    Sounds lke there is noise on the line.  I don't recall if there is a calibration procedure...

    I believe the front end of that kit uses the ADS1298 or similar (is that correct?)

    You may want to post on the ADC forum to see if there is any help there. 

     

  • 0 in reply to DaveB123
    Prodigy 120 points

    Hi Dave:

                 The AFE card i am using is manufactured by TI, which uses ADS8328 as ADC.

    I think the problem is lying in setting DC Offset for second amplifier which is supplied from

    channel C of DAC7573. But i don't know how to adjust its setting.

    Any one facing the same problem?

    Regards

    Fayaz.