INMP441 MEMS High Precision Omnidirectional compatible Microphone Module I2S

This INMP441 compatible  MEMS Microphone Module represents the next generation of digital audio sensing. Unlike traditional analog microphones that require complex pre-amplification and external ADCs, the INMP441 outputs a high-fidelity 24-bit digital signal directly over an I2S (Inter-IC Sound) bus. This drastically reduces electronic noise interference and simplifies the circuit design for modern microcontrollers.

Note: This is a compatible clone with functionality completely same as that of INMP441

Studio-Grade Performance in a Tiny Package

Equipped with a flat wideband frequency response ranging from 60 Hz to 15 kHz, this module captures natural, life-like audio. With a high Signal-to-Noise Ratio (SNR) of 61 dBA and high sensitivity of –26 dBFS, it excels in near-field voice applications, ensuring that voice commands are recognized accurately even in ambient environments.

Seamless Integration with Modern MCUs

The I2S interface allows for a “plug-and-play” digital audio experience with powerful controllers like the ESP32, STM32, and Raspberry Pi. By eliminating the need for an external audio codec, developers can save space and power, with the module drawing only 1.4 mA during operation.

Key Features

• Digital I2S Interface: Provides 24-bit high-precision digital audio output directly to your processor.

• Omnidirectional Pickup: Captures sound equally from all directions, ideal for ambient sensing.

• Superior Signal Clarity: Features a 61 dBA SNR and –75 dBFS Power Supply Rejection (PSR) to filter out noise.

• Ultra-Low Power: Efficient 1.4 mA current draw makes it perfect for battery-powered IoT devices.

• Wide Compatibility: Fully compatible with ESP32, Raspberry Pi, and other I2S-capable hardware.

Technical Specifications

Feature	Specification
Interface	I2S (Digital)
Resolution	24-bit
Frequency Response	60 Hz – 15 kHz
Sensitivity	–26 dBFS
SNR	61 dBA
Supply Voltage	1.8V – 3.3V
Current Consumption	1.4 mA
Pickup Pattern	Omnidirectional

ESP32 Connection Guide

Pin	Function	ESP32 GPIO
SCK	I2S Serial Clock	GPIO 14
WS	I2S Word Select	GPIO 15
SD	I2S Data Output	GPIO 32
L/R	Channel Select	GND (Left) / VCC (Right)
VCC	Power Supply	3.3V
GND	Ground	GND

Typical Application Scenarios

• Smart Assistants: Building DIY Alexa or Google Home style AI speakers.

• Voice Recognition: Implementing speech-to-text features in robotics.

• IoT Security: Sound-triggered alerts and environmental audio monitoring.

• Wearable Tech: Compact audio recording devices with low power requirements.

Package Includes

• 1 x INMP441 compatible  MEMS Microphone Module

• 1 x Header Pin Set (Unsoldered)

Important Product Disclaimer

Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. Product images are shown for illustrative purposes only and may differ from the actual product.

Note on Setup: To avoid permanent damage to the MEMS sensor, ensure that you use a fine-tip soldering iron and avoid getting flux or cleaning agents inside the small sound hole on the top of the module.