Product Introduction  

The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog-to-digital converter, anti-aliasing filter, power management and an industry standard 24-bit I²S interface. The I²S interface allows the INMP441 to connect directly to digital processors such as DSPs and microcontrollers, eliminating the need for an audio codec in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications. The INMP441 has a flat broadband frequency response, resulting in natural sound with high clarity.

Product Features   

1. Digital I²S interface with high-precision 24-bit data

2. High signal-to-noise ratio of 61 dBA

3. High sensitivity -26 dBFS

4. Stable frequency response from 60 Hz to 15 kHz

5. Low power consumption: low current consumption 1.4 mA

6. High PSR: -75 dBFS

Interface definition:

SCK: Serial data clock for I²S interface

WS: Serial data word select for I²S interface

L/R: Left/right channel select.

When set to low level, the microphone outputs the signal on the left channel of the I²S frame.

When set to high level, the microphone outputs the signal on the right channel

SD: Serial data output for I²S interface.

VCC: Input power supply, 1.8V to 3.3V.

GND: Power ground

This product provides tutorials for using ESP32 modules with I2S function

Connect to our ESP32 development board:

INMP441 ESP32 development board

SCK >> GPIO14

SD >> GPIO32

WS >> GPIO15

L/R >> GND

GND >> GND

VDD >> VDD3.3

 Actual image of the product

Company Information