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PCM1690 Use As 8CH ADAT Decoder

Dean Micheli1
Prodigy 230 points
Other Parts Discussed in Thread: PCM1690

Hi,

I am looking for an IC that can Decode 8 channel ADAT into analog audio. Can the PCM1690 perform the operation and do I need to use anything special to convert the digitial light pipe connection to something that the PCM1690 can work with?

Best Regards,

Dean

  • 0
    TI__Expert 5555 points

    Dean,

    have a look at the wavefront semiconductor IC's to decode ADAT to multiple PCM/I2S streams.

    Cheers

    Dafydd

  • 0 in reply to Dafydd Roche
    Prodigy 230 points

    Hi Dafydd,

    Wavefront semi was the first stop on my search. All of their parts are either discontinued or not for new designs. They also cannot handle 32bit float or 192kHz sample rates. Is there another way to decode and encode ADAT?

    Best Regards,

    Dean

  • 0 in reply to Dean Micheli1
    TI__Expert 5555 points

    Hello Dean,

    I'm not aware of ADAT even supporting 192kHz in it's standard. the last I saw was SMUX, with it's 96kHz 4ch support. Are there any audio sources that support ADAT at 192?

    S/PDIF is the alternative option for 192kHz support.

    /DAfydd

  • 0 in reply to Dafydd Roche
    Prodigy 230 points

    Hi Dafydd,

    I've never really studied the capabilities of ADAT out of devices, however I have also never read in any product manuals that the ADAT cannot output the best bit depth and sample frequency that the device can handle.  S/PDIF would be another option for a standard as it is on the output of most devices, however I see that ADAT has only been used in the past for multitracking backup digital copies in studios. I think the device I am trying to create would better be inserted as something to use the ADAT out instead of the S/PDIF, because now that backups have gone away these outs are available and can be used more readily.

    Best Regards,

    Dean