INMP441 omnidirectional microphone module MEMS high-precision low-power I2S interface supports ESP32

Product introduction:

The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. Should

The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog - to - digital converters, anti-aliasing filters, power management and an industry-standard 24 -bit I²S interface. The I²S interface allows the INMP441 to be connected directly to digital processors such as DSPs and microcontrollers without the use of audio codecs used in the system . The INMP441 has a high signal-to-noise ratio, making it an excellent choice for near-field applications. The INMP441 has a flat broadband frequency response, resulting in natural sound with high definition.

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 selection for I²S interface

L/R : Left / right channel selection.

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

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

SD : Serial data output of I²S interface .

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

GND: power ground 

Connect with our ESP32 development board :

INMP441 ESP32 development board

1. SCK >> GPIO14
2. SD >> GPIO32
3. WS >> GPIO15
4. L/R >> GND
5. GND >> GND
6. VDD >> VDD3.3