PPK2 showing noise in Source Mode graph

RE: PPK2 showing noise in Source Mode graph

shstapleford — Wed, 28 Jul 2021 12:51:22 GMT

I added a 1N34A in line with the power and that seemed to fix it. Maybe some ground loop effect between the DUT and the PPK2. Made about a 1 to 2uA reading difference but for our purposes that solved the issue.

RE: PPK2 showing noise in Source Mode graph

shstapleford — Wed, 28 Jul 2021 11:04:07 GMT

devzone.nordicsemi.com/.../ppk_2D00_20210728T104732_2D00_data_2D00_logger.zip

RE: PPK2 showing noise in Source Mode graph

shstapleford — Wed, 28 Jul 2021 10:55:32 GMT

Noise is about 166mS

RE: PPK2 showing noise in Source Mode graph

Marjeris Romero — Wed, 28 Jul 2021 10:06:15 GMT

Hi,

I am sorry for the late reply.

Could you try to zoom where the noise is? And see if there is the spikes have a frequency? Even better if you are able to upload the PPK files here, there is an option to export the measurements into a PPK format in the left menu bar:

But it's not normal that the PPK2 gives so much noise. If the frequency of the spikes are 30-50ms interval it could be "refresh spikes" from the regulator in the chip, which will have some current burst when it's in idle, refresh mode, which is normal. If the noise interval is closer to 1ms it could be noise from the USB peripheral.

Best regards,

Marjeris