PDM MEMS Microphone Breakout
PDM (Pulse Density Modulation) MEMS microphone breakout for hosts with PDM microphone input support, such as nRF52 and SAMD51 microcontrollers.
Pinout
- 3V
Power input pin for the PDM microphone chip.
Type · powerVoltage · 1.8V to 3.3V supported by chip; Adafruit notes 1.8V is not tested. - GND
Power and data ground reference.
Type · groundVoltage · 0V reference - SEL
Left/right select. High outputs on falling CLK edge as right channel; low outputs on rising edge as left channel.
Type · controlVoltage · 3V logic domain - CLK
PDM clock input.
Type · clockVoltage · 1 MHz to 3 MHz square wave required - DAT
PDM data output.
Type · signalVoltage · 3V logic domain
Start wiring
I2S · Analog · 3.3 – 5 V · Breakout
Adafruit/Pimoroni list the electret microphone amplifier as a MAX4466-based board with 2.4–5 V DC supply, rail-to-rail analog output and …
Module pins: 3V, GND, CLK, DAT. Schematik maps them to your board in the app.
Microphones
17 other optionsMAX4466 and MAX9814 electret preamp breakouts for analog audio, I2S MEMS mics (ICS-43434, SPH0645LM4H, INMP441) for digital audio, PDM breakouts, ReSpeaker arrays for far-field pickup, and an LM386 sound detector.
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