https://devzone.nordicsemi.com/f/nordic-q-a/20920/nrf8001---dc-dc-converter---avdd-pinHi, In the schematic presented in the topic 17.1 (dc/dc converter, image below) of the nRF8001 datasheet it isn&#39;t shown that AVDD should be connect to a power supply as in the topic 17.4. dc/dc converter enabled: dc/dc converter disabled: en-USTelligent Community 13Thu, 30 Mar 2017 12:55:35 GMThttps://devzone.nordicsemi.com/thread/81704?ContentTypeID=1Thu, 30 Mar 2017 12:55:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ee5ccc75-1e9e-407e-88fd-2b1818c5d90fdidier<p>Thanks for your support!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/81703?ContentTypeID=1Thu, 30 Mar 2017 11:57:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:60bf32e0-6f0b-4d4a-b321-29aab4b0e8baHung Bui<p>Hi,</p> <p>If you use DC/DC, then don&#39;t connect AVDD to VCC_nRF. When using DCDC, AVDD should be connected to DCC which will provides power to the RF part. This is shown in the first schematic you post.</p><div style="clear:both;"></div>