https://devzone.nordicsemi.com/f/nordic-q-a/6039/another-nrf51422-nrf51822-pa-questionI have seen several good questions and answers on this forum regarding the use of a PA for extending range of the nRF51422/nRF51822 devices. I have a battery-powered application that requires very low power consumption. The devices recommended in otheren-USTelligent Community 13Thu, 19 Mar 2015 09:51:13 GMThttps://devzone.nordicsemi.com/thread/21122?ContentTypeID=1Thu, 19 Mar 2015 09:51:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6767523b-e01a-4720-8e99-f028ed3b09adAsbj&#248;rn<p>You can bypass the PA with a switch. It&#39;s common to use the VDD_PA pin on the nRF51 as a selector for the switch. You can&#39;t load anything off the VDD_PA pin, but you should be able to use it level as indication to when you need to power up the power amplifier and which direction to select for the switch. VDD_PA will be at 1.8 V when the device is in transmit mode and stay at 0 V when on receive mode.</p> <p>Regarding PA to use, the SkyWorks one seems to be fine. You have basically summed it up initially. Any 50 Ohm single ended PA design for 2.4 GHz band should work.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/21121?ContentTypeID=1Fri, 13 Mar 2015 14:04:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e2e60922-7c7c-4fe7-a70e-8aefa759fcb4kalauffenburger<p>I just discovered a Skyworks solution that would meet my requirements: <a href="http://www.skyworksinc.com/uploads/documents/SE2431L_202410H.pdf">www.skyworksinc.com/.../SE2431L_202410H.pdf</a></p><div style="clear:both;"></div>