INMP441 MEMS Microphone Module – I2S Interface

The INMP441 is a high-performance digital MEMS microphone with an I2S interface, designed for audio applications that require accurate, stable, and high-quality sound capture. It is particularly well suited for microcontrollers such as the ESP32, Raspberry Pi, and any I2S-compatible embedded system. Key Features Digital MEMS microphone I2S digital audio interface Omnidirectional directivity 24-bit audio resolution Low noise floor Low power consumption No external ADC required Technical Specifications Operating voltage: 3.3 V Sampling rate: up to 48 kHz Signal-to-noise ratio (SNR): approximately 61 dB Data format: standard I2S Channel selection: Left / Right (L/R) Operating temperature: -40 °C to +85 °C Form factor: compact PCB module with male header pins Typical Pinout VDD: 3.3 V power supply GND: ground SD: audio data output SCK / BCLK: bit clock WS / LRCLK: word select / left-right clock L/R: audio channel selection Advantages Stable digital audio output Excellent immunity to interference Easy integration with ESP32 Compact and robust design