Description

INMP441 MEMS High Precision Omnidirectional Microphone Module I2S

The INMP441 is a high-precision, low-power, omnidirectional MEMS microphone module with a digital I2S interface and a 24-bit data output, ideal for direct connection to DSPs and microcontrollers in audio and voice recognition projects.

Key Features

• Omnidirectional, Digital I2S Output: Captures sound from all directions, outputting a 24-bit data stream via the I2S interface for crystal-clear audio.

• High Signal-to-Noise Ratio (SNR): Offers a typical SNR of 61 dBA, ensuring clear sound pickup, even in busy environments.

• High Sensitivity: Rated at -26 dBFS (decibels relative to full scale), supporting accurate voice and general audio applications.

• Flat Frequency Response: Maintains a consistent response from 60 Hz to 15 kHz, resulting in natural, intelligible sound suitable for near- and far-field use.

• Low Power Consumption: Consumes only 1.4 mA (typical), ideal for battery-operated devices.

• Small Form Factor: Surface-mount package, dimensions approximately 4.72 × 3.76 × 1 mm.

• Operating Voltage: Works with typical supply voltage between 1.8 V and 3.3 V.

Pinout and Interface

• SCK/BCLK: Serial data clock for I2S

• WS/LRCLK: Left/Right word selection for I2S (low = left channel, high = right channel)

• SD: Serial data output (I2S)

• VCC: 1.8–3.3 V power supply

• GND: Ground.

Applications

• Voice assistants and audio recorders

• IoT nodes and communication devices

• Mobile devices, laptops, tablets

• Gaming consoles, teleconferencing systems, and security systems.

This makes the INMP441 a flexible and robust choice for digital audio input, especially where high fidelity and omnidirectional pickup are crucial.