The INMP441 I2S Digital Microphone is a compact, low-power, and high-accuracy audio input module widely used in modern IoT and embedded systems. Unlike traditional analog microphones, the INMP441 outputs digital audio directly over I2S, ensuring superior noise immunity, accurate sampling, and improved sound quality.
This microphone module features an omnidirectional MEMS sensor, allowing it to capture clear sound from all directions. With a built-in preamplifier and high signal-to-noise ratio (SNR), it delivers excellent audio performance even in noisy environments.
Thanks to its I2S interface, the module connects easily to microcontrollers such as ESP32, ESP8266 (with I2S mod), Raspberry Pi, Arduino (with I2S library), and STM32. It supports left, right, or stereo channel selection through simple pin configuration.
Key Features
Digital I2S audio interface (no analog noise)
High SNR for clean voice capture
Omnidirectional MEMS microphone
Low power consumption, compact design
Compatible with ESP32, Raspberry Pi, STM32, Arduino I2S
Selectable left/right channel
Perfect for voice assistants, sound recognition, and audio recording projects
Package Includes
1 × INMP441 I2S Digital Microphone Module
Applications
Voice recognition systems
Audio spectrum analyzers
Sound level monitoring
Smart IoT devices
Speech-controlled projects
Environmental noise measurement
Voltage Range
INMP441 microphone IC:
Supply Voltage (VDD): 1.62V – 3.63V
Recommended operating voltage: 1.8V – 3.3V
Logic level: Compatible with 3.3V systems
For the common INMP441 breakout module, it is normally designed to be used with 3.3V, especially with ESP32 boards.
⚠️ Do not apply 5V directly to the INMP441 IC.
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