The INMP441 is a high-performance, low-power digital MEMS microphone module with an I2S interface, perfect for audio capture projects requiring digital sound input. With its omnidirectional sensitivity, compact form factor, and compatibility with ESP32, Raspberry Pi, and other microcontrollers, it’s ideal for applications like voice recognition, smart assistants, and IoT audio.

Key Features:

• Omnidirectional Microphone – Captures sound from all directions equally
• Digital I2S Output – Direct digital audio output; no need for analog-to-digital conversion
• I2S Interface – Compatible with ESP32, STM32, Raspberry Pi, and other I2S-enabled boards
• MEMS Technology – Compact and reliable with low power consumption
• Low Noise & High Signal-to-Noise Ratio (SNR) – Ideal for clear voice/audio applications

Specifications:

• Microphone Type: MEMS (Digital)
• Directionality: Omnidirectional
• Interface: I2S (Serial Audio Interface)
• Supply Voltage: 3.3V DC
• Output Format: I2S, 24-bit PCM
• Frequency Response: 60 Hz – 15 kHz
• Signal-to-Noise Ratio: 61 dBA (typical)
• Sensitivity: -26 dBFS (±1 dB)
• Current Consumption: ~1.4 mA
• Compatible Boards: ESP32, STM32, Raspberry Pi, Teensy (with I2S)

Pinout:

• VCC: 3.3V Power Supply
• GND: Ground
• WS: Word Select
• SCK: Serial Clock
• SD: Serial Data Out