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PCM4222: Common Master Clock source buffer required?

Shaun Pentecost
Prodigy 20 points
Part Number: PCM4222

When using the TDM8 mode and paralleling up 4 PCM4222 ICs, do I require additional clock buffering per IC or can I just parallel these inputs?

I will use the front end circuitry from the EVM schematics which utilises the CLK source->buffer->divider path. So I'm asking if I need an additional buffers after this to isolate each clock input for the PCM4222

Thanks

  • 0
    TI__Guru 57800 points

    Hi, Shaun,

    Welcome to E2E, Thanks for your interest in our products!.

    For the application you describe, a single buffer can be used after paralleling the clocks of the four ADCs, before the CLK output of your system.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer