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TS5A23159: Interrupt AES3 broadcasting

Genadi Manoilenko
Prodigy 95 points
Part Number: TS5A23159
Other Parts Discussed in Thread: DIT4192, , TS5A22364

Tool/software:

Hello TI Support,

I’m developing a device that needs to interrupt AES3 audio broadcasting at a scheduled time to play a prerecorded audio file.

I chose the DIT4192 for this purpose, as its features match my requirements well. Could you please review the attached schematic and let me know if it should work reliably—specifically without introducing jitter?

Thank you in advance for your support.

Best regards,
Genadi Manoilenko

  • 0
    TI__Mastermind 24440 points

    Hi Genadi,

    The high level schematic for the TS5A23159 looks correct however I have some additional questions and suggestions that might help optimize your design.

    1.What is the voltage and frequency of the signals that the TS5A23159 will be seeing in this application? It can only handle signals between VCC and 0V(It cannot handle negative signals on it io pins) For that reason our team does have multiplexer that can operate at single supply 3.3V and handle negative signals.

    2.TI Analog multiplexers like the TS5A23159 and the other parts in the above link do not add significant jitter to applications as they are bidirectional passive devices that are designed to affect the system as little as possible. However if we would like to understand the jitter that multiplexers can add the we can take a look at the propagation delay of a TI multiplexer.  The jitter that a TI multiplexer can add to the system is effectively the change in propagation delay the device can have in the application. Because we can look at look at a TI multiplexer effectively as a RC circuit in the analysis and that the on capacitance of a multiplexer stays consistent across testing according to the datasheet, the most important specification that causes a  multiplexer to have jitter is any variation in Ron, Ron flatness or Delta Ron. However just to reiterate because the TS5A23159  has low variation in these specs it should be fine in this application and not add any Significant jitter.

    I am not a expert in the DIT4192 device but I can loop another team to take a look at this device.

    Please let me know what you think about my comments and I can help more if needed

    Regards,

    Kameron

     

  • 0 in reply to Kameron Hill
    Prodigy 95 points

    Thank you, Kameron, for your quick response and helpful information.

    The AES3 signal is specified as 2–7 Vpp with frequencies up to 192 kHz.

    I’ve decided to go with the TS5A22364, which appears to meet these requirements.

    I would greatly appreciate it if someone from your team could review the DIT4192 design and share their feedback. Especially I would like to know if should i add more bypass capacitors to DIT4192 for reliable operation.

  • 0 in reply to Genadi Manoilenko
    TI__Mastermind 24440 points

    Hello Genadi,

    Sounds great and the TS5A22364 should be a good choice.

    I am not a expert in the DIT4192 but another TI team will help on this thread for that device.

    Regards,

    Kameron