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TAA5242: Do we have design check list?

Yuxi Liu(Tony)
Expert 3220 points
Part Number: TAA5242

Tool/software:

Hi TIer

Do we have TAA5242 sch and pcb layout design check list?

And I have a question , If we want to get 70dB system SNR ,and I found a 80dB microphone.

Do we need add one Low noise amp between ADC and microphone? 

Is there any AMP include in TAA5242? How about it performance?

And do you have some application note to design a microphone part? and ADC part?

Thank you very much.

  • 0
    TI__Mastermind 27330 points

    Hi Yuxi,

    We've given layout guidelines and snapshot in section 7.4 of the datasheet.

    We've also provided the schematic in the EVM's user guide: https://www.ti.com/lit/pdf/slau904

    The ADC noise floor wont degrade the SNR performance since it is much higher than 70dB. I also don't think a mic pre-amp is necessary unless the signal is very small, but if you do choose to include one in your design I would suggest one with an SNR greater than 80dB.

    There is no integrated gain amplifier in the ADC, so if you want to take advantage of the FSR then a mic pre-amp may be necessary for low level signals.

    You can reference the EVM's user guide for schematic assistance.