TLV320ADC3101: PDM input support

Shinji Tsuji

Genius 14189 points

Part Number: TLV320ADC3101
Other Parts Discussed in Thread: TLV320AIC3106, TLV320AIC3101, , TLV320ADC3100

Hi team,

I have a question about digital microphone input support of this device.

Does it support PDM signal output from digital microphone?

regards,

over 5 years ago

0 Collin Wells over 5 years ago

TI__Guru 64125 points

Hello,

The TLV320AIC3101 does not support digital microphones. The TLV320AIC3106 is in the same family and does though.

0 Shinji Tsuji over 5 years ago in reply to Collin Wells

TI__Genius 14189 points

Hi,

Thank you for the answer.

I made a mistake typing the device name.

I mean TLV320ADC3101.

Does it support?

regards,

0 Collin Wells over 5 years ago in reply to Shinji Tsuji

TI__Guru 64125 points

Hello,

Yes, the TLV320ADC3101 supports digital microphone inputs. The TLV320ADC3100 does not though.

0 Shinji Tsuji over 5 years ago in reply to Collin Wells

TI__Genius 14189 points

Hello,

I would like to double check that digital microphone input that ADC3101 expects is PDM format?

regards,

0 Collin Wells over 5 years ago in reply to Shinji Tsuji

TI__Guru 64125 points

Hello,

Yes, the ADC3101 expects a standard PDM output format digital microphone. There are some I2S microphones out there as well which could probably somehow be interfaced with the ADC3101, but we haven't seen that and the PDM style output D-Mics are the ones the ADC3101 was directly designed to support.

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TLV320ADC3101: PDM input support