Guide to nRF51822 revisions? (LPCOMP, 12K pulldown)

RE: Guide to nRF51822 revisions? (LPCOMP, 12K pulldown)

Ole Morten — Tue, 05 Nov 2013 08:45:49 GMT

This newly released whitepaper may also be useful: https://www.nordicsemi.com/eng/content/download/35525/598833/file/nWP-018_nRF51822_Migration_Whitepaper.pdf

RE: Guide to nRF51822 revisions? (LPCOMP, 12K pulldown)

Ole Morten — Mon, 04 Nov 2013 13:08:21 GMT

I can't say this for sure, as the exact codes used are dependent on the distributor.

Normally, I'd say that QFAA means that they are 256 kB chips, and that R7 indicates that this is for ordering a reel. Hence, I don't think this says anything about the revision, so you should ask the distributor directly for details.

RE: Guide to nRF51822 revisions? (LPCOMP, 12K pulldown)

Guan Yang — Mon, 04 Nov 2013 13:02:34 GMT

So QFAA-R7 does, in fact, have LPCOMP and internal pulldown?

RE: Guide to nRF51822 revisions? (LPCOMP, 12K pulldown)

Ole Morten — Mon, 04 Nov 2013 11:36:49 GMT

The PCN explains all the differences between all revisions of the nRF51822, but you seem to have read it the other way around: it is in fact CA/C0 that does not have the LPCOMP and the internal pull down. As you can see in the "Marking/shipping labes" section, new devices will have FA, GC or G0 markings for the QFN, 256 kB package.

As for making sure to get a second revision chip, I'd currently recommend you to get in touch with our sales manager for your area. If you don't have the needed contact information, please send me a private message.