source selection using adc potentiometer

Question

Hi, Is there a way to select one of several inputs using an analog potentiometer connected to the auxiliary ADC on the adau1701? 
 Just like in the attached image. 
 Thanks for your reply. Regards.

DaveThib · Accepted Answer

Hello Kuba-s, 
 I have this example project which is selecting an index selectable filter but you can use the same process to select an input MUX. 
 Dave T 
 1261.ADAU1701 AUXADC Index Selectable Filter.dspproj)

KJBob · Answer

Hello all, 
 The -1701's Auxiliary ADCs include built-in hysteresis which helps prevent undesired changes in what they control. Four-bit hysteresis plus a low-pass filter is standard; you can select three other options with register settings in the Register Settings window: 
 
 The Aux ADCs are covered on Page 45 of the ADAU1701 Data Sheet . There may be some confusion as to the labeling of these settings -- see this link: 
 ADAU1701 Aux ADC Hysteresis Settings

KJBob · Answer

SigmaStudio's Real Time Display gets its data from the DSP's Readback register. Unfortunately, the -1701 Readback register truncates its lowest four bits. This causes the plot's low resolution. 
 Best regards, 
 Bob

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source selection using adc potentiometer

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