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PCM3168A: PCM3168a Input Channels to use for Dual Mode Configuration (96KHz)

Muhammad Awais
Intellectual 640 points
Part Number: PCM3168A

Hello TI

We are implementing a total of 6 channels with sampling frequency (fs) of 96Khz. TI has suggested us to use PCM3168A in PCM mode by using 2 PCM3168A. This device has 8 DAC and 6 ADC channels. I have checked the Table 11, and figure 52 for our required modes but figure 52 is only distributed with respect to 8 channels as shown in the snapshot given below. 

I am confused that how I will distribute the channels on both PCM3168A chips because Figure 52 (red marking) is distributing between channels 1 to 8, that I believe implies for DAC, but when it comes to ADC then how they will be distributed? 

Please let me know which configuration given below is correct? Also if Option 2 is correct then how these channels are mapped because Figure 52 is considering 8 channels that is only in case of DAC but not ADC.

Option 1=> Ch1/Ch4, Ch2/Ch5, Ch3/Ch6  (Ch1, 2, 3 will be from PCM3168A Chip1 and Ch4, 5, 6 will be from PCM3168A Chip2)

OR 

Option 2=> Ch1/Ch5, Ch2/Ch6, Ch3/?     (Ch1, 2, 3 will be from PCM3168A Chip1 and Ch5, 6 will be from PCM3168A Chip2)

Kind regards,

Muhammad Awais

  • 0
    TI__Guru 57800 points

    Hi, Muhammad,

    I need to make a correction, on the diagram I shared previously, I made a mistake and used two PCM3168s where only one is required for six ADCs, the correct diagram should be as follows. I was confusing the PCM168A with a different part which supports multiple device TDM operation. The PCM3168A supports TDM but only a single device per bus. 

    Regarding your question, the way the output channels will be accommodated is as follows:

    • DOUT1:  Ch1, Ch2, Ch3, Ch4
    • DOUT2: Ch5, Ch6.

    Sorry for the confusion.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer

  • 0 in reply to Diego Melendez
    Intellectual 640 points
    Hello Diego,

    Thanks for the clarification. So this means we can use 96KHz sampling via dual mode Dout1 and Dout2 from single chip.
    I am working on the schematic and will share with you to review the final form.


    Thanks,

    Muhammad Awais