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ADS1298RECGFE-PDK: ADS1298R ECGFE Rev B

Gaurav Dubey34
Prodigy 155 points
Part Number: ADS1298RECGFE-PDK
Other Parts Discussed in Thread: ADS1298R,

For our work we are using ADS1298R with MMB0. for loading our file we are using ADS1298REVM Tool.

Here we have two ADS1298R   ECGFE REVB and we are giving same register setting to both ADS1298R through development tool as shown below:

 so when we remove any lead it should show on lead off status.

still one board responds to all leads correctly and other board is not responding for V3,RA,LA leads for lead off detection.

So how we can resolve this issue?

and more question is that if we want to factory reset ADS1299R then how we can do that without resetting it using development tool.

  • 0
    TI__Guru**** 181751 points
    Hi Gaurav,

    Off the top of my head, I can't give you a good reason why one board is giving correct Lead Off detail and the other is not. Are both MMB0 boards the same revision? To reset the ADS1298R without going through the GUI, you could momentarily short pin 8 to pin 10 on J3 (see schematic detail, page 66 of the ADS1298RECGFE-PDK Users Guide). I don't know for sure if that will 'break' the communication between the PC and EVM hardware, but you could set some registers to something other than the defaults and then verify their contents from the 'Register Map' tab. Momentarily short J3 pin2 8-10, and then click the 'Refresh Registers' button on that tab to see if they updated and that you still have communication with the hardware.
  • 0 in reply to Tom Hendrick
    Intellectual 260 points

    we have tried to reset the device as per you have suggested above so when we reset it all the registers are set to 0x00. and again we set it to default still it is not sensing lead-off for V3,RA,LA. I would like to mention that on all channels we are getting data perfectly.

    so if we want to check why it is not sensing lead-off for these leads which part of hardware we should check??

  • 0 in reply to Saloni Gandhi
    TI__Intellectual 2885 points
    Hi,

    After reviewing the issue with my team. There have been issues with when having all the positive electrodes enabled and tie them all to one negative electrode. I would recommend enabling all the other negative inputs, or starting with only one or two channels. When you have several electrodes connected together. You can also try adjusting the lead off current magnitude.