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EEG Schematic review

Derek Xie
Genius 12255 points

Other Parts Discussed in Thread: ADS1299, OPA376, ADS1298

Hi Team:

Could you help me to check the EEG schematic? Whether it can work? I am not familar with it. Need your help on it. Thanks a lot.

ADS1299.pdf

  • 0
    TI__Mastermind 38745 points
    Hey Derek,

    There are a few problems with this circuit. First, R18 and C20 will not have the desired effect of setting the gain for the Bias amplifier. Look at Figure 52 in the datasheet for an example connection. Second, pin 64 should be left as an open circuit. Finally, the SRB pins are connected as inputs to an op-amp, but the SRB pins are high impedance inputs to the ADS1298. This means the inputs to the OPA376 will be floating which will result in undesirable behavior. What are they trying to accomplish with the op-amp?

    Regards,
    Brian Pisani