https://devzone.nordicsemi.com/f/nordic-q-a/2413/nrf51822-certified-balunsExactly what baluns are known to work with the nRF51822. I believe there is the STMicro balun and am uncertain about the status of the Johansen balun. Is there a list of preferred baluns?en-USTelligent Community 13Wed, 01 Oct 2014 09:56:06 GMThttps://devzone.nordicsemi.com/thread/9795?ContentTypeID=1Wed, 01 Oct 2014 09:56:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cfd6a461-6739-4082-80c0-af3455e5fb58Omar Al Attar<p>Hi,</p> <p>which disadvantages would I expect when using the BAL-NRF02D3 with the nRF51822 QFN?</p> <p>Thanks, Omar</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/9796?ContentTypeID=1Fri, 02 May 2014 07:28:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2f343fbe-3796-4eb9-86d2-d7c550785856FormerMember<p>Hello,</p> <p>Currently, only the ST baluns are certified/recommended for the nRF51822. For the nRF51822 QFN package, the BAL-NRF0<strong>1</strong>D3 should be used. For the nRF51822 WLCSP package, the BAL-NRF0<strong>2</strong>D3 should be used.</p> <p>Edit: There are now more baluns that can be used:</p> <ul> <li>QFN: <a href="http://www.johansontechnology.com/integrated-passives/chipset-specific-ipc/nordic-semiconductor.html#.VCvoQfl_vUY">Johanson Technology 2450BM14E0003</a></li> <li>WLCSP: <a href="http://www.cyntec.com/product/bal/download/TBL-1411-245-LR.pdf">Cyntec TBL-14-11-245-LR</a></li> </ul> <p>The list of the baluns to be used can be found on the <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF51822">nRF51822 webpage</a> --&gt; &quot;Development tools and software&quot; tab</p> <p>Regards, Kristin</p><div style="clear:both;"></div>