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MSP430FR2355: Smart combo for audio processing

HS FAE Germany
Mastermind 32560 points

Part Number: MSP430FR2355

Hello,
customer needs a compact solution for signalling tones, speech and sounds on a small loudspeaker and also measuring enviroments noise with a microphone. I thought to use MSP430FR2355 for this tasks. I thought of following way:

Measuring sound:
Microphone -> OA -> 12bit-ADC -> CPU

Generating sound:
Flash -> CPU/DMA -> 12bit DAC -> OA -> loudspeaker

Can this work? Is there any reference design?

Regards, Holger

  • 0
    TI__Expert 6635 points

    Hi Holger!

    HS WG-FAE said:
    Measuring sound:
    Microphone -> OA -> 12bit-ADC -> CPU

    I believe this is doable, but it will depend on a few things such as the max and min voltages generated from the microphone and the required drive strength of the op amp. You might also need some passives between the mic and op amp.

    HS WG-FAE said:
    Generating sound:
    Flash -> CPU/DMA -> 12bit DAC -> OA -> loudspeaker

    Yes! This is definitely doable. One thing to mention - you will need to feed the audio output of the MSP into a dedicated audio op amp to get the required drive strength to drive the speaker. I am looking for resources on this and will get back to you soon.

    Thanks,

    Mitch

  • 0 in reply to Mitch Ridgeway
    TI__Expert 6635 points

    Hi Holger,

    I sent you a request to connect. Please accept my request.

    Thanks,

    Mitch

  • 0 in reply to Mitch Ridgeway
    TI__Expert 6635 points

    Hi Holger, 

    I will close out the thread since we are handing this internally.

    Thanks,

    Mitch

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