Hello Markus, Can you confirm the DC voltages that you have applied to the device? 1. REFP? Should be 4.096V if using the internal reference. AVDD and DVDD voltages as well. 2. Confirm that DECAP pin measures ~2.85V. 3. ADC-INM should be connected to ground. 4. ADC-INP should read whatever you have on AIN1. You may want to connect an input signal directly to the ADC-INP just to bypass the Mux until you get the communications working. Also, referring to your above timing diagram, bring /CS low a forth time and issue another 24 SCLK's to see if you can get a response. Regarding your last question, once the part is configured, you can keep SDI low (NOP) and read the buffer on each frame for the next conversion data. There is no dedicated 'Read Value' command needed. This could also be a timing issue. If possible, please provide a zoomed in capture of SCLK relative to the /CS and SDI pins. Thank you, Regards, Keith N. Precision ADC Applications
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