ADAU1372 with regards to sampling rate

Hi ,

I would like to know if i can use ADAU1372 with sampling frequency fs = 37.5khz with MCLK of 9.6MHz by passing PLL fs=fmclk÷256

Thanking you 

With best regards 

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  • +1
    •  Analog Employees 
    on Jun 21, 2021 9:14 PM

    Hello parziwal,

    Yes, you can use it with those frequencies. 

    You actually do not have to use that MCLK, the beauty of this part is that you can run the core of the device on its own clock domain using almost any clock or just use a crystal just for this part. Then the serial port inputs and outputs go through a sample rate converter so it can adapt to almost any incoming sample rate while the ADCs and DACs operate at a high speed like 192kHz to have low latency. 

    The only detail is that the serial ports should be a slave to be the most flexible. 

    If you need for the 1372 to be a clock master then you will need to operate it using the 9.6MHz MCLK so it will then produce the 37.5kHz fs.

    Dave T

Reply
  • +1
    •  Analog Employees 
    on Jun 21, 2021 9:14 PM

    Hello parziwal,

    Yes, you can use it with those frequencies. 

    You actually do not have to use that MCLK, the beauty of this part is that you can run the core of the device on its own clock domain using almost any clock or just use a crystal just for this part. Then the serial port inputs and outputs go through a sample rate converter so it can adapt to almost any incoming sample rate while the ADCs and DACs operate at a high speed like 192kHz to have low latency. 

    The only detail is that the serial ports should be a slave to be the most flexible. 

    If you need for the 1372 to be a clock master then you will need to operate it using the 9.6MHz MCLK so it will then produce the 37.5kHz fs.

    Dave T

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