INMP441 MEMS High Precision Omnidirectional Microphone Module I2S

INMP441 MEMS High Precision Omnidirectional Microphone Module I2S

The INMP441 Microphone Module is a high-quality, low-power solution for digital audio acquisition in embedded systems. It utilizes an I2S (Inter-IC Sound) interface, meaning the sound is converted into a digital serial bitstream directly on the microphone chip (MEMS), eliminating the noise and complexity associated with analog signal transmission and external Analog-to-Digital Converters (ADCs). This results in superior audio quality and excellent immunity to electromagnetic interference (EMI).

The module is omnidirectional, capturing sound waves equally well from every direction, making it highly versatile for ambient recording, voice command systems, and audio monitoring. With an impressive Signal-to-Noise Ratio (SNR) of 61 dB and high sensitivity, it captures clear audio, even in quiet environments. The module operates efficiently at 3.3V and features excellent Power Supply Rejection (PSR), a critical advantage that minimizes artifacts and noise introduced by noisy power supplies in complex electronic setups like the ESP32 or Raspberry Pi.

🔧 Key Features  

• Microphone Type: MEMS (Micro-Electro-Mechanical System) Digital.
   
• Polar Pattern: Omnidirectional (Equal sensitivity in all directions).
   
• Output Protocol: I2S (Inter-IC Sound).
   
• Signal-to-Noise Ratio (SNR): 61 dB.
   
• Supply Voltage (VDD): 1.8V to 3.3V DC.
 
• Clock Frequency: Supports master clock rates up to 4.8 MHz.
 

💡 Applications

• Voice Command and Voice Recognition Systems (e.g., Alexa/Google Home clones).
   
• Acoustic Sensor for industrial monitoring and noise measurement.
 
• Digital audio recording and streaming for IoT devices (e.g., ESP32, Raspberry Pi).
 
• Security and surveillance audio capture.
 

⚙️ Technical Specifications Summary

📦 Package Includes   

• 1 × INMP441 MEMS High Precision Omnidirectional Microphone Module I2S