INMP441 Compatible I2S MEMS Microphone module

Description

Product Title

INMP441 Compatible I2S MEMS Microphone Module – Digital Audio Input Module

 Overview

The INMP441 Compatible I2S MEMS Microphone Module is a compact digital microphone solution designed for embedded audio applications. Featuring a MEMS microphone element with an integrated ADC and I2S digital audio interface, the module enables high-quality audio capture while eliminating the need for analog signal conditioning.

Its low power consumption and direct I2S output make it ideal for use with ESP32, STM32, Raspberry Pi, and other microcontrollers supporting digital audio interfaces.

Key Features

• INMP441-compatible digital MEMS microphone
• Native I2S digital audio output
• High signal-to-noise ratio (SNR)
• Omnidirectional microphone pickup pattern
• Low power consumption
• Compact module design
• Direct interface to ESP32, STM32, and other I2S-capable MCUs
• No external ADC required

Technical Specifications

Microphone Section

• Microphone Type: MEMS Microphone
• Directionality: Omnidirectional
• Digital Output: I2S
• High-quality digital audio capture

Interface

• Communication Protocol: I2S
• Output Signals:
  • WS (Word Select / LRCLK)
  • SCK (Serial Clock / BCLK)
  • SD (Serial Data)

Electrical Characteristics

• Operating Voltage: 3.3V
• Low power operation
• Logic Level: 3.3V

Pin Functions

• VCC
• GND
• WS (Word Select)
• SCK (Bit Clock)
• SD (Data Output)
• L/R (Channel Select)

Board Type

• Fully Assembled and Tested

Power & Programming

• Operates from a 3.3V supply
• Interfaces directly with microcontrollers supporting I2S audio input
• No external ADC required
• Compatible with Arduino, ESP-IDF, STM32Cube, and other embedded development frameworks

Applications

• Voice recognition systems
• Smart home devices
• Audio recording projects
• IoT voice-enabled products
• Sound level monitoring
• Digital audio acquisition
• AI and edge-audio applications

What’s Included

• 1x INMP441 Compatible I2S MEMS Microphone Module

Notes

• Designed for 3.3V operation.
• Not recommended for direct connection to 5V logic systems without level compatibility verification.
• Requires an I2S-capable microcontroller or processor.
• Audio quality may be affected by enclosure design and environmental noise.

Example ESP32 Connections

This module is particularly popular for ESP32 voice capture projects, audio logging systems, and real-time sound processing applications.