https://devzone.nordicsemi.com/f/nordic-q-a/24317/where-can-i-find-nrf51422-qfaa-t-pdf-datasheeti doing the pcb tiring to find the package size . also if there is any application note to the pcb Antena thanks adien-USTelligent Community 13Mon, 14 Aug 2017 08:17:03 GMThttps://devzone.nordicsemi.com/thread/95740?ContentTypeID=1Mon, 14 Aug 2017 08:17:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d11c0e6c-d27d-43f4-8e96-88ef0c16765dendnode<p>Note that <strong>ALL</strong> Nordic resources are on Infocenter. In your case documentation for nRF51 is divided between <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/pdflinks/51422_ps.html?cp=3_5_0">Product Specification</a> (chip variant specific) and <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/pdflinks/ref_manual.html?cp=3_2">Reference Manual</a> (common for whole family). These documents provide some reference schematics but for antenna there are couple of <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.whitepapers/dita/whitepapers/white_papers.html?cp=11">whitepapers</a> from Nordic as well as <a href="https://devzone.nordicsemi.com/blogs/">blog posts</a>.</p><div style="clear:both;"></div>