https://devzone.nordicsemi.com/f/nordic-q-a/6321/16mhz-crystal-stabilityThe nRF51422 product specification says that you have to use a +-40 ppm crystal for BLE applications. On DigiKey, there are 2 columns for 2520 crystals: frequency stability and frequency tolerance. What should I use while choosing my crystal? Exampleen-USTelligent Community 13Mon, 14 Aug 2017 11:54:30 GMThttps://devzone.nordicsemi.com/thread/22049?ContentTypeID=1Mon, 14 Aug 2017 11:54:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ea11075d-dae5-4a73-a704-bca41bfcab0cProtexFor<p>Good day, I have to make an application that has a wide temperature range, what stability do you recommend?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22048?ContentTypeID=1Wed, 01 Apr 2015 13:59:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7070e01-c868-4635-84d4-5a825348bf01Victor Nascimento<p>Great answer! Thank you sir.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22047?ContentTypeID=1Wed, 01 Apr 2015 09:14:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6031f1fe-e5e5-443f-96e7-c75df6aad530Asbj&#248;rn<p>The stability number defines the variation from temperature and in some cases variances in load capacitors as well. The +/-40 ppm requirement would be for tolerance, stability and aging. If you are creating an application that will be in room temperature it natural to see a lot better stability as the temperature range will be smaller. The crystals you refer to should be fine to be used, but if you are making an application with very wide temperature range expectancy, you might want to find something will slightly better stability across temperature.</p><div style="clear:both;"></div>