SPECIFICATIONS

This sensor is a high-performance, low-power, digital output, omnidirectional MEMS microphone with a bottom port. Compatible with INMP441. 

It is composed of a MEMS sensor, signal composition regulation, analog-to-digital converter, anti-aliasing filter, power management and an industry-standard 24-bit I2S interface. The I2S interface enables it to be directly connected to digital processors such as DSPS and microcontrollers without the need for audio codecoders used in the system. With a high signal-to-noise ratio, it is an excellent choice for near-field applications. It has a flat wideband frequency response, resulting in high clarity of natural sound. 

Main features: 

A digital I2S interface with high-precision 24-bit data 

The high signal-to-noise ratio is 61 dBA 

High sensitivity -26 dBFS 

Stable frequency response from 60 Hz to 15 kHz 

Low power consumption: Low current consumption of 1.4 mA 

High PSR: -72 dBFS 

It can be used as a breadboard after welding, or it can be directly laminated and welded for use 

Interface definition: 

SCK: Serial data clock of I2S interface 

WS: Serial data word selection for the I2S interface 

L/R: Left/Right channel selection: 

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 of I2S interface 

VCC: Input power supply, 1.6V to 3.6V 

GND: Power ground 

Connect to the ESP32 development board: 

This module - ESP32 development board 

SCK   -- GPIO14 

SD     -- GPIO32 

WS    -- GPIO15 

L/R    -- GND 

GND    -- GND 

VDD - VDD3.3