This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

FDC2214PROXSEN-EVM unstable working

Other Parts Discussed in Thread: FDC2214PROXSEN-EVM


I've got FDC2214PROXSEN-EVM. It works, but there is some problem:

1. Red LED D1 "Low Bat" shines even with fresh battery (1.5V). DC/DC output is normal, about 3.25V

2. After a few Button1/Button2 touching Proximity LED could be on for a long time (from 4 sec to a tens minutes).

3. Proximity LED sometimes blink abruptly.

All tests was made in usual office enviroment, no RF or another disturbance sources (just usual PC/mobile phones surroundings)

  • Hi Oleg,

    Thanks for your questions. Please see responses below:

    1. Sorry for the confusion, you can ignore the "Low Bat" LED. The transistor does not perform as expected but the DC/DC output should be normal as you observed.

    2 and 3. These are known firmware issues with the data processing. They should go away with the correct algorithm - unfortunately, we have not been able to update the firmware yet. If it helps, I can send you the firmware and you can tweak the algorithm to remove these issues.

  • Hi Rachel,
    Will you please send the firmware to me as well?