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.

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)