M5Stack PDM MEMS Microphone Unit

The M5Stack Mini PDM Unit is a compact digital MEMS microphone module with PDM output, offering high sensitivity, low power consumption, and strong RF interference resistance for audio capture in wearable and smart device applications.

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The M5Stack Mini PDM Unit is a digital MEMS silicon microphone based on PDM (Pulse Density Modulation) signals.

It features high signal-to-noise ratio, high sensitivity, low power consumption, strong RF interference immunity, and smooth frequency response.

The microphone automatically switches states (power-off/active/sleep) according to the clock frequency, making it suitable for audio data acquisition in wearable devices and smart digital devices.

Features

• PDM signal output (CLK/DAT)
• High sensitivity and high signal-to-noise ratio
• Low power consumption
• Strong RF interference immunity
• LEGO-compatible

Specifications

Digital Mic	SPM1423
Sensitivity	94dB SPL@1KHz Typical: -22dBFS
SNR	94dB SPL@1KHz, A-weighted Typical: 61.4dB
THD	100dB SPL@1KHz Typical: 1%
Operating Current	600µA
Enclosure Material	Plastic (PC)
Product Size	24.0 x 24.0 x 13.0mm
Product Weight	4.0g

Resources

• Product documentation

Package Contents

• 1x M5Stack PDM MEMS Microphone Unit (SPM1423)
• 1x HY2.0-4P Grove Cable (5cm)