8in/8out system around the ADAU1466

Dear All, 

I am interested in a quite complex system that will have to deal with many inputs and outputs.

I checked the ADAU1466 evaluation board and it seems that, by using the two remaining serial input ports, I could hook-up a compatible ADC .

I spot the ADAU1372 but it also have two outputs that I don't need (and AFAIK I can't drive :))) 

Is there a suitable part from the AD catalogue that can be compatible with the aforementioned platform (ADAU1466+AD1938)  ?

Thanks in advance!!

Parents
  • Any advise?? 

    As far as I can see, The ADAU1466+AD1938+ADAU1372 should work. Will I need to configure separately the codecs or their hardware mode is sufficient to support this system?

    Thanks in advance!

  • +1
    •  Analog Employees 
    on Sep 3, 2019 8:51 PM over 1 year ago in reply to DavideMancini

    Hello DavideMancini,

    First of all, many customers either use the 1372 for the two DACs and do not use the ADCs or use the ADCs and not the DACs. So you would not be the first to do this. 

    You certainly can use this configuration but you will have to program the registers in the ADAU1372. This can be done by the DSP using the Master Control Port functions and setting up an XML file with the proper commands. But it is a bit tricky if you have never done this. 

    The AD1938 can operate in the standalone hardware mode as long as you are running at 48kHz fs. Otherwise, it would also have to be setup by the DSP. 

    You may want to consider using a second AD1938 or the AD1974 quad ADC which is part of the same family of parts so it works the same as the AD1938. 

    If you eventually use your own hardware then you could do a trick of using two AD1938 parts but using two channels with one inverted to develop a differential signal with the 8 extra DACs. You get a small improvement in the DAC specifications. 

    Dave T

Reply
  • +1
    •  Analog Employees 
    on Sep 3, 2019 8:51 PM over 1 year ago in reply to DavideMancini

    Hello DavideMancini,

    First of all, many customers either use the 1372 for the two DACs and do not use the ADCs or use the ADCs and not the DACs. So you would not be the first to do this. 

    You certainly can use this configuration but you will have to program the registers in the ADAU1372. This can be done by the DSP using the Master Control Port functions and setting up an XML file with the proper commands. But it is a bit tricky if you have never done this. 

    The AD1938 can operate in the standalone hardware mode as long as you are running at 48kHz fs. Otherwise, it would also have to be setup by the DSP. 

    You may want to consider using a second AD1938 or the AD1974 quad ADC which is part of the same family of parts so it works the same as the AD1938. 

    If you eventually use your own hardware then you could do a trick of using two AD1938 parts but using two channels with one inverted to develop a differential signal with the 8 extra DACs. You get a small improvement in the DAC specifications. 

    Dave T

Children
  • Dave thank you so much.

    We've just finished a big 'platform' project based on the 1701 in stand alone mode (really IMPRESSIVE what you can do with that little guy!!!!) and this will keep us busy in the next few months developing algos and otpimizaitons.

    I will publish here a link to the product pages when ready!

    In the meantime I am very interested in the 1466 that adds a lot of data memory for delays and reverbs but lacks the analog I/Os. Having an 8x8 platform will cover all of our needs.

    Requests for Fs greater than 48khz may arise, so I will  put in the upcoming design a way to program the 1938 and 1974. I will investigate on the master control port but probably I will put a small microcontroller that can also take care of this (and maybe some UI chores).

    Ciao!!!!