nRF52840 pcb - through hole via

RE: nRF52840 pcb - through hole via

ketiljo — Fri, 21 Aug 2020 12:11:32 GMT

That should be fine.

RE: nRF52840 pcb - through hole via

wallance.lin — Thu, 20 Aug 2020 10:35:56 GMT

the distance between two pads is only 0.125mm when we follow the guidelines. it will be increased to 0.225mm when we keep them are 0.275mm. it is better to avoid soldering bridge from production view. May I have your help to advise if any risk to impact the IC performance or something if we would like to keep current setting? or where we need pay attention if we would like to keep it. thanks!

RE: nRF52840 pcb - through hole via

ketiljo — Thu, 20 Aug 2020 08:01:15 GMT

For a aQFN pad size od 0.25 mm, the recommended PCB land pad size is 0.275 mm, with a solder mask of 0.375 mm and a stencil opening (paste mask) of 0.3 mm.

RE: nRF52840 pcb - through hole via

wallance.lin — Thu, 20 Aug 2020 03:51:48 GMT

thanks!! we also adjust the land pad design to keep all them are 0.275mm.

it doesn't follow the guideline, may I have your help to check if any concern for it?

RE: nRF52840 pcb - through hole via

ketiljo — Wed, 19 Aug 2020 12:22:01 GMT

Smaller vias are no problem, if your PCB manufacturer are happy with it.