INMP441 Omnidirectional Microphone Module I2S MEMS High Precision for ESP32

【Product Introduction】

INMP441 is a high-performance, low-power, digital output, omnidirectional MEMS microphone with a bottom port. The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog-to-digital converter, anti aliasing filter, power management, and industry standard 24 bit I ² S interface. The I ² S interface allows the INMP441 to be directly connected to digital processors such as DSP and microcontrollers without the need for audio codecs used in the system. INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications. INMP441 has a flat broadband frequency response, resulting in high clarity of natural sound.

【Product Features】

1. Digital I ² S 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 of 1.4 mA

6. High PSR: -75 dBFS

【 Interface definition 】

SCK: Serial Data Clock for I ² S Interface

WS: Serial Data Word Selection for I ² S Interface

L/R: Left/right channel selection.

When set to low level, the microphone outputs a signal in the left channel of the I ² S frame.

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

SD: Serial data output of I ² S interface.

VCC: Input power supply, 1.8V to 3.3V

GND: Power Ground

Connecting with ESP32 development board：

INMP441ESP32

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