ADS1299 VS ADS1298

ahmedalaa87ahmedalaa87
edited August 2014 in Cyton
first of all i would like to thank the team for this great effort. i am doing my master in controlling a hand prosthetic by EEG signal. and i have some questions about the components.
1- can i use ADS 1298 instead of ADS 1299 ?
2- what r the electrical characteristics should i rely on to compare between ADS family rather than SNR, CMMR, ?

best regarde

Comments

  • tarotaro
    Hi,
    For question No.1
    <blockquote>
    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</blockquote>

    You can find it here:
    http://e2e.ti.com/support/data_converters/precision_data_converters/f/73/t/231604.aspx

  • clothbotclothbot
    Has anyone tried using 2xADS1298=16 channels (or perhaps 3xADS1298=24 ch for full 10-20 coverage) to run at lower total power and lower voltage than a single ADS1299, and letting the Kalman filter (or whatever technique you're using) deal with the relatively poorer single-channel noise characteristics?

    It'll cost more in terms of processing power (not to mention 3xADS1298@$24 vs ADS1299@$36), but perhaps the benefits outweigh them in terms of full system performance.

    Andrew.
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