Adafruit PDM Mic Module - Qwiic

Adafruits' PDM is the 'third' kind of microphone you can integrate with electronics, apart from analog or I2S.

The first thing to note is that this sensor does not provide an 'analog' output like many of our electret microphone assemblies. So it's great for chips that do not have analog inputs. Secondly, the digital interface is a very simplistic pulse density modulation output. It's digital but its not PWM and it's not I2S. You will need to make sure your chip has a PDM interface - most 32-bit processors these days do.

PDM is a little like 1-bit PWM. You clock the mic with a 1 MHz - 3 MHz clock rate, and on the data line you'll get a square wave out that syncs with the clock. The data line will be 0 or 1 logic output, with the square wave creating a density that when averaged will result in the analog value out.

Quick Spec

  • Voltage Range: 1.8-3.3V
  • Clock Rate: 1 - 3.25 MHz
  • Current Draw: 0.6mA
  • SNR: 61 dB
  • Sensitivity: ~-26 dBFS
  • Product Dimensions: 14 x 14 x 4.5mm
  • Weight: 0.7g

Pinout

  • 3V: This is the power input pin, this powers the chip directly. Use a quiet power supply pin if available. (The chip supports 1.8-3.3V but we have not tested it at 1.8V)
  • GND: Power and data ground reference
  • SEL: Left/Right select. If this pin is high, the output is on the falling edge of CLK considered the 'Right' channel. If this pin is low, the output is on the rising edge, a.k.a 'Left' channel.
  • CLK: PDM clock in, 1 - 3 MHz square wave required
  • DAT: PDM data out.

Resources

Shipping List

  • 1 x Adafruit PDM Mic Module - Qwiic
  • 1 x Qwiic Cable - 100mm
  • 1 x JST-SH Du Pont male 4 Pin Cable


Adafruit PDM Mic Module - Qwiic

  • Brand: Adafruit
  • Product Code: AF4346
  • Weight: 0.011kg
  • Stock

    Warehouse Stock Status Location
    Centurion In Stock UL063
    Stellenbosch In Stock V7

    We ship free of charge between branches to complete your order.

  • R138.00 (Inc Tax: R158.70)


Related Products

Breakout Board for Electret Microphone

Breakout Board for Electret Microphone

Breakout Board for Electret Microphone This small breakout board couples an Electret microphone (100Hz--10kHz) with a 60x mic preamplifier to amplify the sounds of voice, claps, door knocks or any ..

Centurion
Stellenbosch
Part No: BOB-12758

R132.00 (Inc Tax: R151.80)

Electret Microphone Amp MAX9814

Electret Microphone Amp MAX9814

Electret Microphone Amp MAX9814 The MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. The device features a low-noise preampl..

Centurion
Stellenbosch
Part No: MAX9814-MOD

R198.00 (Inc Tax: R227.70)

Adafruit MEMS Mic Breakout

Adafruit MEMS Mic Breakout

Adafruit MEMS Mic Breakout PDM is the 'third' kind of microphone you can integrate with electronics, apart from analog or I2C. These microphones are very commonly used in products, but are rarely see..

Centurion
Stellenbosch
Part No: AF3492

R105.00 (Inc Tax: R120.75)

Adafruit USB to GPIO/I2C/Qwiic Connector

Adafruit USB to GPIO/I2C/Qwiic Connector

Adafruit USB to GPIO/I2C/Qwiic Connector The Adafruit MCP2221A breakout board allows your computer to talk to various peripherals without the need for a microcontroller. The MCP2221 ..

Centurion
Stellenbosch
Part No: AF4471

R129.00 (Inc Tax: R148.35)

Adafruit FT232H USB to GPIO Board

Adafruit FT232H USB to GPIO Board

Adafruit FT232H USB to GPIO Board This chip from FTDI is similar to their USB to serial converter chips but adds a 'multi-protocol synchronous serial engine' which allows it to speak many common pr..

Centurion
Stellenbosch
Part No: AF2264

R328.00 (Inc Tax: R377.20)

Tags: adafruit, pdm, mic, microphone, audio, sound, qwiic