https://devzone.nordicsemi.com/f/nordic-q-a/12328/balun-compatibility-w-rev-3-siliconI&#39;ve notice that the ST Balun NRF01D3 that I&#39;ve used for my current design is not listed as compatible with Rev 3 (Build code: H) nRF51822 Silicon. Has there been any change in the Radio section and/or matching on Rev 3 Silicon vs Rev 2 Silicon? Ien-USTelligent Community 13Mon, 07 Mar 2016 18:50:38 GMThttps://devzone.nordicsemi.com/thread/46655?ContentTypeID=1Mon, 07 Mar 2016 18:50:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28e92542-a590-4425-9e13-eef667336e44Dave_couling<p>Thanks Kristin,</p> <p>I found that the ST performs much better than the Johanson for the nRF51822 QFAA. Thank you for confirming compatibility.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/46654?ContentTypeID=1Mon, 07 Mar 2016 13:28:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d67261ba-a0df-47e3-b31b-5de1ffb9f4d6FormerMember<p>There is no difference in the radio section between silicon revision 2 and 3 of nRF51.</p> <p>With silicon revision 3, BALF-NRF01D3 should only be used with the 256kB flash / 16 kB RAM version of the chip. The reason is that BALF-NRF01D3 doesn&#39;t perform that well with the other versions nRF51822 QFN rev 3. It means that it gives lower output power, and smaller margins for passing FCC/ETSI. That&#39;s why we recommend you to use Johanson 2450BM14E0003 or BALF-NRF01E3 instead.</p><div style="clear:both;"></div>