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ADS1298RECGFE-PDK: ADS1298R ECGFE Rev B

Saloni Gandhi
Intellectual 260 points
Part Number: ADS1298RECGFE-PDK
Other Parts Discussed in Thread: ADS1298R, ADS1292R, ADS1298

We are using ADS1298R for our application.

We want to do Pace Detect using ADS1298R.

ADS1298R has Config Register PACE for pace detection so it has option to select 2 channels for pace one for even and one from odd. so this option is available for Software approach only ? 

If we are going to use hardware approach then how we should config this register??

for pace detect two pins are there TESTP_PACE_OUT1 & TESTP_PACE_OUT2.

The Circuit for pace detect using Hardware Detect is attached below:

so here the output is coming from  PACE1_OUT so what is the significance of PACE1_OUT. how we should connect it? or make it floating only?

  • 0
    TI__Guru**** 181751 points
    Hi Saloni!

    Our 'pace detect' experts for the ADS1292R are on a winter holiday break. We'll get back to you early next week with some suggestions on how to proceed.
  • 0 in reply to Tom Hendrick
    TI__Guru 66906 points

    Hello Saloni,

    Thanks for your post.

    The PACE detect register configures the ADS1298 so that the analog output of the selected PGAs is available on the TEST_PACE_OUTx pins. The differential output of the selected channel is converted to a single-ended signal through a dedicated PACE amplifier with a gain of 0.4 V/V. There are two PACE amplifiers in the ADS1298: one which can connect to any positive channel and another which can connect to any negative channel.

    Whether you decide to use this signal for Hardware or Software PACE detection is up to you. The Hardware method you showed above simply takes the single-ended PACE_OUT signal and passes it through a window comparator circuit. The output of the comparator can be connected to one of the available GPIO pins on the ADS1298 and read in the STATUS word that precedes the channel data from each conversion.

    Best Regards,