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ADS1298 for 3 elecetrode ECG

paul miller44746
Intellectual 540 points
Other Parts Discussed in Thread: INA333, OPA333, ADS1294, ADS1298, ADS1194

Can this device be configured in a 3 electrode ECG configuration? Comparing this against a Discrete solution using an OPA333, and some INA333's feeding into an MSP430.

Anyone know a good reference for how this would compare area/power consumption wise?

Thanks,

Paul

 

  • 0
    TI__Intellectual 1600 points

    Hi Paul,

    Yes, the ADS1298 could be configured for just three electrodes.  However, a better option (for the price) is the ADS1294 which has 4 channels rather than 8.  That should release before the end of the year, and the customer could use the ADS1298 for evaluation in the meantime.

     

    The ADS1294 would clearly be smaller in area vs a solution that has a few OPA333's and INA333's and all the associated precision gain resistors.  A power comparison is more difficult without more information about how they will implement the discrete solution.

     

    Incidentally, a discrete solution using the MSP430 would probably be using the MSP430's 16-bit onboard delta-sigma converter for the ADC.  If they are satisfied with that level of performance, an even better part would be our ADS1194.  That device is 16-bit rather than 24-bit.  So it is less expensive and is lower power.  They'll also get better performance from that 16-bit converter over the integrated 16-bit converter of the MSP430.

     

    Regards,

    Rudye