https://devzone.nordicsemi.com/f/nordic-q-a/24619/using-a-mux-with-nrf51822-adcHi, I am trying to use a mux change among 3 differential channels. The diff signal then goes through an instrumentation amplifier. The steps I&#39;m using: switch to ch1, read adc1, wait 3ms switch to ch2, read adc1, wait 3ms switch to ch3, read adc1en-USTelligent Community 13Thu, 24 Aug 2017 09:19:07 GMThttps://devzone.nordicsemi.com/thread/96919?ContentTypeID=1Thu, 24 Aug 2017 09:19:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9520ca53-157f-46d3-a87c-cbc5e1f29c1fJ&#248;rgen Holmefjord<p>Have you checked the MUX_Ax lines with logic analyzer/scope? What is the output from <code>adc1.read_u16();</code> in each step? Does is change?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/96917?ContentTypeID=1Thu, 24 Aug 2017 09:00:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e8c8966c-59f0-4f38-a8c9-6afeed021ba7Yasser<p>Yes. I&#39;m using mbed. Basically a mux ADG659 chooses a differential channel, that goes through an instrumentational amp AD623. Finally ADC of the Nordic is used to read out the signal at the output of the instrumentational amp.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/96918?ContentTypeID=1Thu, 24 Aug 2017 08:47:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e171115e-e248-49b5-82e9-d226e4aa8e58J&#248;rgen Holmefjord<p>You are using mbed? Are you interfacing external ADC? How is the inputs and outputs configured?</p><div style="clear:both;"></div>