https://devzone.nordicsemi.com/f/nordic-q-a/45164/nrf52832-adc-sampling-modemy ADC work in this mode :timer+PPI+SAADC the ADC is 12bit I init ADC like these code sample every data 15us,and 16 data per channel I only init one channel,and use the switch funtion to switch channel.the code like these I found if I connecten-USTelligent Community 13Mon, 25 Mar 2019 10:56:57 GMThttps://devzone.nordicsemi.com/thread/178067?ContentTypeID=1Mon, 25 Mar 2019 10:56:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:19a6057e-77ba-440f-b46c-f8940095a094Kenneth<p>I don&#39;t have any good explanation to that,&nbsp;are both buffers initialized as static?</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177799?ContentTypeID=1Fri, 22 Mar 2019 10:34:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:31484486-0fcf-498e-b897-b60285725474NORDIC_SUR<p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1553249993405v2.png" alt=" " /><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1553250807304v3.png" alt=" " /></p> <p>I find another <span style="color:#000000;">phenomenon</span>,if I set sample 32 ADC data,the first 8 data is same as the laster 8 data of another channel.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177574?ContentTypeID=1Thu, 21 Mar 2019 12:39:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2456451f-3216-4ef9-8d27-050b9232a46fKenneth<p>Hi,</p> <p>If pins are unconnected and floating, then&nbsp;the input is undefined, and you can&#39;t rely on measurement (it may due to parasitic float up or down due to nearby circuitry or voltage).</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>