M5stack Grove - PDM MEMS Microphone Unit (SPM1423)

The M5Stack Grove - PDM MEMS Microphone Unit (SPM1423) is a compact digital microphone module using Pulse Density Modulation (PDM). It provides an I2S port output with PDM encoding (CLK/DAT), making it ideal for microcontrollers supporting these interfaces.

This MEMS microphone features high sensitivity, an excellent signal-to-noise ratio, and low power consumption. Its case is LEGO® compatible, and it offers good immunity to radio frequency interference. The unit automatically switches between sleep, active, and power-down states based on the clock frequency.

Specifications

• Sensitivity: -22 dBFS (at 94 dB SPL @ 1 kHz)
• Signal-to-Noise Ratio: 61.4 dB (A-weighted)
• Total Harmonic Distortion: 1% (at 100 dB SPL @ 1 kHz)
• Operating Voltage: 1.6 V to 3.6 V
• Operating Current: 600 µA
• Interface: I2S / PDM (CLK/DAT)
• Module Size: 24 x 24 x 13 mm
• LEGO® and Grove compatible

Included

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