Asking for PDM mic clock and data buffer

SHH

Mastermind 32606 points

Other Parts Discussed in Thread: SN74LVC2G34, SN74AUP2G34

Hi Team,

Customer is designing digital mic with PDM interface.

Do we have two channel buffer for PDM signal?

thanks for help!

BR,

SHH

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 326000 points

As far as I can see, Pulse Density Modulation is a normal logic signal. So you can use any buffer that is fast enough.

What voltage are you using? What is the length of a bit in the bitstream?

0 SHH over 4 years ago in reply to Clemens Ladisch

TI__Mastermind 32606 points

Hi Ladisch,
One bit width is around 0.3us in one cycle.

BR,
SHH

0 Clemens Ladisch over 4 years ago in reply to SHH

Guru 326000 points

The propagation delay of all logic families is much faster than300 ns. You can use any buffer that supports whatever voltage you are using, e.g., SN74AUP2G34, SN74LVC2G34.

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Asking for PDM mic clock and data buffer