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ADAU1772 mixed digital and analog inputs

Question asked by BabyNSX on Jan 20, 2016
Latest reply on Jan 21, 2016 by DaveThib

I'm interested in maximizing the number of audio channels available as input into this device. There are a total of 4 microphone/analog inputs and a single TDM capable digital serial input (2-8ch).


In working with SigmaStudio the channel routing and design elements limit the channel count in the schematic flow to just 4 individual channels. Each of these can be configured to be any analog or digital input; however, the maximum number of simultaneous signals appears to be 4.


Is this a hardware limit of the ADAU1772 or a limit imposed on the part through SigmaStudio based on the expected use cases?


Ideally I'd like to have access to all 4 analog inputs, the 2 analog outputs as well as sending digital audio in and out of the chip.