The INMP441 MEMS High Precision Omnidirectional Microphone Module I2S is a top-tier digital audio sensing board designed for high-clarity voice recording, audio streaming, and speech recognition…
The INMP441 MEMS High Precision Omnidirectional Microphone Module I2S is a top-tier digital audio sensing board designed for high-clarity voice recording, audio streaming, and speech recognition applications. Built around the InvenSense INMP441 MEMS IC, this module features an integrated omnidirectional sensor element, signal conditioner, analog-to-digital converter (ADC), and anti-aliasing filter, providing direct 24-bit digital audio output via an I2S serial interface.
Unlike traditional analog microphones that suffer from background noise and analog-to-digital conversion loss, the INMP441 outputs pure digital PCM audio data over I2S (SCK, WS, SD). This eliminates the need for external audio codecs or preamplifiers. It offers a wide frequency response (60Hz to 15kHz), high signal-to-noise ratio (61dBA SNR), and low current consumption, making it ideal for battery-powered IoT and voice-controlled systems.
The module supports both left and right channel selection via the onboard L/R pin, allowing two microphones to share a single I2S data bus for stereo recording setups. Operating at a 3.3V logic supply, it seamlessly interfaces with high-performance microcontrollers and processors like ESP32, Raspberry Pi, STM32, and Teensy.
| Core Transducer IC | InvenSense INMP441 Digital MEMS Microphone |
|---|---|
| Output Interface | Standard I2S (Inter-IC Sound) 24-bit Digital Audio Output |
| Polar Pattern | Omnidirectional acoustic pickup with high sensitivity |
| Frequency Range | Wide audio frequency response from 60Hz to 15kHz |
| High Signal-to-Noise Ratio (SNR) | 61dBA for clean, low-noise recording |
| Sensitivity | -26 dBFS sensitivity rating |
| Operating Voltage | 1.8V to 3.3V DC (3.3V typical) |
| Low Power Consumption | Ultra-low current draw (1.4mA typical) |
| Channel Selection | Dedicated L/R pin for left or right channel configuration (stereo capable) |
| Interface Pinout | 6-pin breakout header (VDD, GND, SD, WS, SCK, L/R) |
What is the operating voltage?
1.8V to 3.3V DC (3.3V typical).
Which interface does it use?
Standard I2S (Inter-IC Sound) 24-bit Digital Audio Output.
Is it compatible with ESP32 and Raspberry Pi?
Yes. It works with ESP32, Raspberry Pi, STM32 projects.
Can I buy the INMP441 MEMS High Precision Omnidirectional Microphone Module I2S in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
