INMP441 MEMS High Precision Omnidirectional Microphone Module I2S

The INMP441 MEMS Microphone Module is a high-performance, omnidirectional, digital output microphone with an I2S interface, designed for applications requiring high-fidelity audio input. This compact module integrates a MEMS sensor, 24-bit ADC, signal conditioning, anti-aliasing filter, and power management into a single unit, delivering exceptional sound quality, low power consumption, and a wide frequency response.

The I2S digital interface allows direct connection to microcontrollers and DSPs like ESP32, Arduino, and Raspberry Pi, eliminating the need for an external audio codec. With its flat wideband response (60 Hz to 15 kHz) and a signal-to-noise ratio (SNR) of 61 dBA, the INMP441 is ideal for near-field voice capture, speech recognition, audio recording, voice-controlled IoT devices, and smart home automation.

⚙️ Features:

• 🎙️ Digital I2S Interface – Supports 24-bit high-precision digital audio output

• 🔊 High Sensitivity – –26 dBFS for accurate sound pickup

• 🧘‍♂️ Low Noise – Signal-to-Noise Ratio (SNR): 61 dBA

• 🔋 Low Power Consumption – Just 1.4 mA current draw

• 📶 Flat Frequency Response – 60 Hz to 15 kHz for natural audio

• 🔧 High Power Supply Rejection (PSR) – –75 dBFS

• ↔️ Omnidirectional Pickup Pattern – Ideal for voice and ambient sound capture

• 💻 Compatible With – ESP32, Raspberry Pi, STM32, and other I2S-capable MCUs

🛠️ Pinout and ESP32 Connection Guide:

📦 Applications:

• 🔊 Voice Recognition Systems

• 🎙️ AI Speakers and Smart Assistants

• 🎧 Audio Recorders and Sound Meters

• 🏠 Smart Home and IoT Devices

• 📢 DIY Audio Projects with ESP32 or Raspberry Pi

• 🤖 Robotics with Environmental Sound Detection

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