INMP441 I2S Digital Microphone Module

About this item

🎙️ INMP441 I2S MEMS Digital Microphone Module

💡 Ultra-Low Noise Digital Microphone

The INMP441 is a high-performance MEMS microphone featuring an omnidirectional pickup pattern, I2S digital output, and built-in ADC. It eliminates the need for external analog circuitry and offers excellent audio capture even in noisy environments.

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🛡️ Built-In Protections & Design

• 📏 ESD protection on input/output lines
• 🔇 Low self-noise and high SNR (Signal-to-Noise Ratio)
• 🔄 Integrated decimation filter and anti-aliasing filter
• 🧲 No external amplifier or ADC required

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📦 Compact & Easy to Integrate

With its compact footprint, low power consumption, and I2S output, the INMP441 connects directly to most modern microcontrollers (ESP32, STM32, Teensy, etc.) without additional components.

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🛠️ Applications

• 🎙️ Voice recognition systems
• 🧠 AI assistants and smart speakers
• 🎧 Audio recording and streaming
• 📦 IoT devices with sound input
• 🤖 Sound detection in robotics

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⚠️ Notes

• 🔌 Requires 3.3V supply — do not connect to 5V
• 🔁 Connect L/R pin to GND (left), 3.3V (right), or float (stereo setup)
• 🧪 Compatible with most I2S-enabled MCUs like ESP32, STM32, etc.
• 📐 Orientation matters — use silkscreen dot to aim toward the sound source

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✨ Key Features

• 🎙️ Output: I2S digital (left/right selectable)
• 🔊 SNR: 61 dBA
• 🌡️ Operating voltage: 3.3V
• 🔄 Sample rate: 10 kHz – 60 kHz
• 📏 Size: ~13mm x 9mm
• 🧊 Low current consumption: < 1.4 mA
• 📶 Omnidirectional pickup pattern

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🔗 Useful Links

• 📄 INMP441 Datasheet (PDF)
• 🧪 ESP32 + INMP441 Example Code
• 📘 Adafruit MEMS Mic Guide