INMP441 I2S MEMS Omnidirectional Microphone

The INMP441 is a high-performance, low-power digital MEMS microphone module designed for clear and accurate audio capture in embedded systems. Featuring a fully integrated design with a MEMS sensor, signal conditioning, analog-to-digital converter, anti-aliasing filter, and power management, it delivers high-quality 24-bit digital audio output via a standard I²S interface.

This allows direct connection to microcontrollers and digital processors such as ESP32 and DSPs without requiring external audio codecs. With a high signal-to-noise ratio and flat frequency response, the INMP441 is ideal for voice recognition, sound detection, and near-field audio applications.

Features

• Digital I²S interface with high-precision 24-bit audio output
• High signal-to-noise ratio of 61 dBA
• High sensitivity of -26 dBFS
• Flat frequency response from 60 Hz to 15 kHz
• Low power consumption under 1.5 mA
• High power supply rejection ratio of -75 dBFS
• Omnidirectional microphone with bottom port design

Interface Pins

• SCK Serial Data Clock for I²S interface
• WS Word Select for I²S interface
• L/R Channel select pin. Low for left channel, high for right channel
• SD Serial data output
• VDD Power input 1.8V to 3.3V
• GND Ground

Pinout Diagram

Specifications

• Interface: I²S digital output
• Resolution: 24-bit
• Signal-to-noise ratio: 61 dBA
• Sensitivity: -26 dBFS
• Frequency response: 60 Hz to 15 kHz
• Power supply: 1.8V to 3.3V
• Current consumption: less than 1.5 mA
• Dimensions: 14mm x 14mm

Datasheet

Download Datasheet

This product can be found here:

• Audio
• Components & Parts
• Microphones
• Sensors