https://devzone.nordicsemi.com/f/nordic-q-a/13064/nrf51822-avdd-pin-issueHello, I have a question regarding AVDD pin. I am using nRF51822 CEAA package. And the reference circuitry on the datasheet uses a 1.0nF capacitor between VDD and GND. If I put a 2.2nF capacitor instead of 1.0nF capacitor, would it cause zero signalen-USTelligent Community 13Mon, 11 Apr 2016 12:57:14 GMThttps://devzone.nordicsemi.com/thread/49822?ContentTypeID=1Mon, 11 Apr 2016 12:57:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:97c3652f-2e53-4998-b82f-d82205b3c5a1Hung Bui<p>You should connect the pin to something, a wire for example, with length of 2 cm should works. You should also check if the firmware working properly. You can use the radio test example in the SDK and monitor the VDDPA pin if it&#39;s high when the radio is supposed to transmit something.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/49821?ContentTypeID=1Mon, 11 Apr 2016 11:54:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:43a67cc7-2fb5-42f1-88e7-3968c8b560b1hello_alberto_<p>Thank you! I have one more question regarding RF. Let say, if we just have a balun whose SE pin is not connected to antenna(SE pin just left unconnected), should nrf51822 at least advertise weakly? or should it have no signal at all?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/49820?ContentTypeID=1Mon, 11 Apr 2016 09:00:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c2efd905-4667-428d-9c66-ef72a385a88dHung Bui<p>Hello Alberto,</p> <p>That capacitor is simply a noise filter. It should be OK to use 2.2nF. And I don&#39;t think it would cause trouble to the RF part.</p><div style="clear:both;"></div>