PCMD3180: Can this support audio signals of 1.8V input and give 3.3V output

Yong Wang

Part Number: PCMD3180

The DMIC I'm using is 1.8V output. How can I use this input to PCMD3180 and get 3.3V level of TDM signal output to avoid a level shifter? Will this configuration work: IOVDD = 3.3V, AVDD=1.8V?
The I2C control is still running under 3.3V.

Thanks!

over 3 years ago

0 Jeff McPherson over 3 years ago

TI__Mastermind 46395 points

Hi Yong,

Let me test this on an EVM and let you know if this works or not. I will reply early next week.

Thank you and best regards,

Jeff

0 Yong Wang over 3 years ago in reply to Jeff McPherson

Prodigy 20 points

Thank you for looking into this, Jeff! Look forward to your test result.

+1 Jeff McPherson over 3 years ago in reply to Yong Wang

TI__Mastermind 46395 points

Hi Yong,

I tried this on an EVM and it does work. See plot below: PDM in Blue, TDM in Purple

Best regards,

Jeff

0 Yong Wang over 3 years ago in reply to Jeff McPherson

Prodigy 20 points

Thank you very much for confirming this! We will use this configuration then.

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PCMD3180: Can this support audio signals of 1.8V input and give 3.3V output