Can a microphone's PDM output be directly interfaced to an I2S port?

Some MEMS microphones like the ADMP421 have a PDM data output. Can this be conected directly to an I2S input on a codec or DSP?

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  • A PDM output microphone, such as the ADMP421, cannot directly interface to an I2S port. This microphone should be connected to the PDM input on codecs such as the ADAU1361, ADAU1761, or ADAU1781. The ADMP441 MEMS microphone has an I2S output that can be connected directly to a processor or codec's I2S input port.

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  • A PDM output microphone, such as the ADMP421, cannot directly interface to an I2S port. This microphone should be connected to the PDM input on codecs such as the ADAU1361, ADAU1761, or ADAU1781. The ADMP441 MEMS microphone has an I2S output that can be connected directly to a processor or codec's I2S input port.

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