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sharing with you boding for vqfn package to qfn footprint. 0.4mm pitch to 0.5mm 12
sharing with you boding for vqfn package to qfn footprint. 0.4mm pitch to 0.5mm
sharing with you boding for vqfn package to qfn footprint. 0.4mm pitch to 0.5mm
You are an artist my friend!
This is nightmare fuel
Ah a good old dead bug mod, great job.
Wait, wouldn’t those wires be going to the wrong pins since the board was laid out assuming the chip would not be upside-down?
Ho. It’s just a regular qfn adapter to 2.54 pitch. So I’ll wire the board to the good pinout after that. But yes, I’ll have to reverse the pinout.
I’ve been there. We were evaluating a new ADC chip due to our current one becoming unobtanium, and we desperately needed to test a few before committing to ordering the full 13000 or whatever. 24 pin QFN, I had a few 24 pin QFN breakout boards like this. Did not realize that chips were 0.4mm pin spacing. I honestly didn’t know there were 0.5 and 0.4 QFNs.
Ended up finding and overnighting some 0.4mm 24pin QFN breakout boards.
Breakout board was great, but we still [created an abomination](https://imgur.com/a/QRqIpOX).
edit: Here is our [final design](https://imgur.com/a/mfP7oaP). Carrier board to be able to use a completely different ADC with a completely different package and pinout.
Hook up the center pad to the negative rail. Might as well at this point. Then coat the entire thing with a glob of hot glue and move on haha
What did you use for the jumpers? 30 AWG Kynar?
Dab of epoxy and you’re done, clean workmanship.
Well done!
One of the neatest kludges i ever saw
Isn’t the big center pad used for cooling via the PCB?