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ADS1298 vs ADS1299

Greg Jackson1
Prodigy 220 points
Other Parts Discussed in Thread: ADS1299, ADS1298, TMS320C5515

For building out an EEG system, can somebody explain the key differences between the ADS1298 and the ADS1299?  The data sheet for the ADS1298 suggests it can be used for EEG.  I realize it's SNR is slightly lower than the 1299, but its power consumption is also significantly lower (an important consideration for a wireless system).

Any help / feedback / etc would be greatly appreciated.

  • 0
    TI__Mastermind 43915 points

    Hi Greg,

    They are both simple 24 bit delta sigma ADCs at the root. The differences lie in a couple of the options including input referred noise as well as gain options. The ADS1299 is a lower noise device which is required for non-intercranial EEG designs. We do have customers using the ADS1298 in EEG applications as well with a low noise INA at the front end to allow for an additional gain stage to help get the input referred noise down.

    Those are the differences at a high level. Peak to peak noise and rms noise are the units in which biopotential customers generally look at noise.

    Regards,

    Tony Calabria

  • 0 in reply to Tony Calabria
    Prodigy 130 points

    Hi Tony，

     I am also trying to build a EEG system (for intercranial EEG). The performance of ADS1299 , especially the low noise, is better than ADS1298, but its power consumption is too high to bear. Could you please provide me a  circuit design example of ADS1298 for the EEG application ?  

    My email is: lingganstar@126.com

    Best Regards!

    Qian 

  • 0 in reply to xing qian
    Prodigy 20 points

    Hi Tony,

    I am also interested in building an EEG system. I have the ADS1298 could you provide with the circuit design for it? Also for the ADS1299 is it a direct fit into the TMS320C5515 EVM?

    My email is: pmirand1@fau.edu.

    Thanks,

    Pedro

  • 0 in reply to Tony Calabria
    Prodigy 130 points
    Hello Tony

    I am also working on similar project and it requires acquiring EEG signals using ADS1298. If a circuit design or any other supportive documentation on acquisition of EEG signal via ADS1298 is available, please mail it to me.
    My email address is daniyasim@hotmail.com.
    Thank you in advance.

    Regards
    Komal Mariam