How to use ADAU1701 as I2S Sample Rate Converter from 44.1kHz Input to 48kHz output?


I am working on an I2S converter which needs to convert the I2S Sample rate from 44.1kHz to 48kHz as shown in the picture below.

May I know can ADAU1701 be the I2S sample rate converter? Or is there any alternative part suggested for this function?



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  • 0
    •  Analog Employees 
    on Feb 20, 2019 7:47 PM

    Hello Kwan,

    The ADAU1701 does not have a sample rate converter in the part. So this part cannot be used.

    The ADAU1442, and the ADAU1452/51/50 will have sample rate converters but it is a complex part to use only as a sample rate converter. If you can use the DSP as well then it may justify the size and cost.

    There is possibly another part. Would a wafer level part be something you would consider? I would require via in pads which makes the build cost much more expensive but the part is really small. I cannot tell you more because the part is not released yet but will be soon.

    We do have an old sample rate converter, the AD1896 that is still in production but is an old part so if you need a part that has a long lifetime then this might not be the best choice.

    Another solution is to go to analog and back to digital. This is not a great solution but is possible. The ADAU1372 would be a good choice for that. You would need two of them for this solution.

    Let me know your thoughts on all this.

    Dave T

  • Hi Dave ,

    Can we use ADAU or SHARC processors input as I2S, process filters and Parametric Equalizers then Out as I2S 

  • 0
    •  Analog Employees 
    on May 18, 2021 4:35 PM in reply to skumar345

    I am @mentioning  here to help answer your question.

    If you do not receive a response within a couple of days, it may be best to create a new question since this is already closed out with a verified answer.

  • 0
    •  Analog Employees 
    on May 18, 2021 9:09 PM in reply to skumar345

    Yes. All of our DSPs can do this.

    Dave T

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