# Digital Microphone Module, Original INMP441, I2S, Omnidirectional, 24-bit, 3.3V

> Digital MEMS microphone module INMP441 (original), omnidirectional, with 24-bit I2S output, intended for audio projects with ESP32 and other microcontrollers without a separate audio codec. Supply voltage 1.8V-3.3V, current consumption 1.4 mA, signal-to-noise ratio 61 dBA, sensitivity -26 dBFS, frequency response 60 Hz-15 kHz. Pins: VDD, GND, SCK, WS, SD, L/R for left/right channel selection.

- Page: https://sigmanortec.ro/en/digital-microphone-module-original-inmp441-i2s-omnidirectional-24-bit-33v
- Price: 44.46 RON
- Availability: In stock; 1-2 zile
- Reference: 88225 · EAN: 5941231086966
- Category: Mechatronics and IoT > Sensors and Modules > Audio and Sound > Speakers and Microphones
- Specifications: Input Voltage: 3.3 V
- Package (shipping data): 0.003 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 05:21 (Europe/Bucharest)

## Description

Omnidirectional MEMS microphone with 24-bit I2S output, ideal for ESP32 audio projects without a separate codec. Provides clear voice and ambient capture, with good signal-to-noise ratio and wide frequency response. Operates at 1.8V-3.3V with low consumption, and left/right channel selection is simply done from the L/R pin.
The INMP441 Digital Microphone Module is an omnidirectional MEMS module with I2S output, designed for audio projects with ESP32 and other microcontrollers, without the need for a separate audio codec.
It offers clear capture of voice and surrounding sounds due to its wide frequency response and good signal-to-noise ratio, making it suitable for applications such as recording, voice commands, sound detection, or small conference systems.
The module delivers 24-bit audio data through the I2S interface, has low power consumption, and operates stably at power supply voltages from 1.8V to 3.3V, with left-right channel selection easily done via the L R pin.
The module is available both in Original and Compatible (cheaper) versions. This product is original.
Specifications:
Power Supply Voltage: 1.8V - 3.3V
Model: INMP441, Original
Microphone Type: Omnidirectional MEMS with bottom port
Interface: 24-bit I2S
Signal-to-noise Ratio: 61 dBA
Sensitivity: -26 dBFS
Frequency Response: 60 Hz to 15 kHz
Current Consumption: 1.4 mA
PSR: -75 dBFS
I2S Pins: SCK, WS, SD
Channel Selection: L R
Dimensions mm (diameter): 14mm
Pinout:
INMP441 Pin
Role
ESP32 (example)
VDD
Power supply 1.8V to 3.3V
3V3
GND
Ground
GND
SCK
I2S clock BCLK
GPIO14
WS
I2S word select LRCLK
GPIO15
SD
I2S data out
GPIO32
L/R
Channel selection
GND for Left or 3V3 for Right
Usage:
Connect the module to the ESP32 as follows
SCK to GPIO14
SD to GPIO32
WS to GPIO15
L R to GND for left channel or to VDD for right channel
GND to GND
VDD to 3.3V
Mount a 100nF decoupling capacitor as close as possible to the VDD pin for stability and noise reduction on the power supply.
For good results, keep the I2S wires as short as possible and avoid routing them near interference sources such as step-up converters, motors, or power cables.
If the application is in a noisy environment, use software filtering and noise reduction algorithms, as an omnidirectional microphone picks up sound from all directions and may capture more ambient noise than a directional microphone.
Fix the module so that the microphone port is not covered and has free access to air for correct sound capture.