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Is the ADS1299 PGA ready for EEG?

paulo farina
Prodigy 140 points
Other Parts Discussed in Thread: ADS1299, ADS1298

Hi,

I´ve read in this forum, that the ADS1298 should not be used directly to patient, and some INA1xx have been recomended to be used with. Is this the case of the ADS1299, or it can be used alone for EEG signal conditioning and conversion?

Thanks

Paulo

  • 0
    TI__Mastermind 43915 points

    Hi Paulo,

    The ADS1299 does not need an additional gain stage from an INAxxxx device so should fit nicely in intracranial ECG applications. You do need patient protection circuitry on the front end however. The chip does not contain any internal patient protection. 

    Regards,

    Tony Calabria

  • 0 in reply to Tony Calabria
    Prodigy 140 points

    Hi Tony,

    I am totaly aware about the need to design patient protection circuitry, so, don´t worry about that. I am worried about your sentence : "The ADS1299 does not need an additional gain stage from an INAxxxx device so should fit nicely in intracranial ECG applications".

    I know you meant ' intracranial EEG applications' but the intracranial adjective makes me worried, couse I intend to make a device to collect the EEG from scalp electrodes (with some conductive paste for sure). Intracranial EEG is obviously easyer, and that is not the target. Would you say the ASD1299 is ready for scalp electrodes EEG?

  • 0 in reply to paulo farina
    TI__Mastermind 43915 points

    Hi Paulo,

    We have customers using the ADS1299 with surface electrodes as well with no additional gain stage. I am not sure about your system considerations but a lot of EEG customers require less than 2uVpp noise input referred for electrodes outside the scalp. The ADS1299 has input referred noise as low as 0.98uVpp in a gain of 24.

    Regards,

    Tony Calabria