ICS-43434 I2S MEMS Microphone Module Breakout with Low-Pass Filter
ICS-43434 I2S MEMS Microphone Module Breakout with Low-Pass Filter - Image 2
ICS-43434 I2S MEMS Microphone Module Breakout with Low-Pass Filter - Image 3
SKU: SENS-3125
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ICS-43434 I2S MEMS Microphone Module Breakout with Low-Pass Filter

₹569.00 (Inclusive of all taxes)
Out of Stock

The ICS-43434 I2S MEMS Microphone Module is a digital audio sensor breakout providing direct 24-bit I2S output for microcontrollers like ESP32, Raspberry Pi Pico, and STM32. It features a built-in low-pass filter and selectable channel configuration for mono or stereo audio capture applications.

Features

  • Digital I2S MEMS Microphone with 24-bit output, eliminating analog conversion noise.
  • Wide frequency response from 50Hz to 15kHz, suitable for general-purpose audio capture.
  • Built-in low-pass filter with a 24kHz cutoff to eliminate ultrasonic interference.
  • Selectable left/right channel configuration for flexible mono or stereo system integration.
  • Ultra-compact footprint (16.8mm x 13mm) with bottom-ported, directional sound input design.

Out of stock

Description

The ICS-43434 is a high-performance, bottom-ported MEMS microphone integrated onto a compact breakout board. It outputs a pure digital I2S signal, providing a clean, noise-immune audio interface directly compatible with modern microcontrollers and single-board computers. The module includes an integrated low-pass filter to remove frequencies above 24kHz, ensuring high-fidelity audio capture without ultrasonic artifacts.

Operating from a 1.6V to 3.6V supply, it supports both high-performance and low-power modes, allowing developers to optimize for audio quality or energy efficiency. With a high signal-to-noise ratio (SNR) and a maximum sound pressure level of 120 dB SPL, it is engineered for reliable performance in embedded voice recognition, sound recording, and acoustic monitoring systems.

Key Features

  • Pure Digital I2S Interface delivers 24-bit audio data directly to host processors without analog signal degradation.
  • Dual Operating Modes include High-Performance (23–51.6 kHz sampling, 490 µA) and Low-Power (6.25–18.75 kHz sampling, 230 µA) for application-specific optimization.
  • Integrated Acoustic Low-Pass Filter suppresses frequencies above 24 kHz to prevent aliasing and improve signal clarity.
  • Selectable Channel Configuration allows the module to be set as left or right channel for stereo array designs.
  • Robust Bottom-Ported Design provides directional sensitivity and protects the MEMS element from dust and physical damage.
  • High Dynamic Range with a 120 dB SPL maximum and >64 dBA SNR ensures clear audio capture even in loud environments.
  • Wide Supply Voltage Compatibility from 1.6V to 3.6V supports low-voltage logic systems common in portable and IoT devices.

Applications

  • Embedded Voice Recognition and Voice Command Interfaces for IoT devices.
  • Digital Audio Recording and Streaming Modules for portable media devices.
  • Acoustic Event Detection and Environmental Noise Monitoring systems.
  • Stereo Microphone Arrays for binaural recording or beamforming applications.
  • Real-time Audio Processing for teleconferencing and communication equipment.

Technical Specifications

Microphone TypeDigital I2S MEMS
Output Format24-bit I2S
Frequency Response50 Hz – 15 kHz
Supply Voltage1.6 V – 3.6 V DC
Max Sound Pressure Level (SPL)120 dB
Signal-to-Noise Ratio (SNR)65 dBA (High-Perf), 64 dBA (Low-Power)
Sampling Rate (High-Perf)23 kHz – 51.6 kHz
Sampling Rate (Low-Power)6.25 kHz – 18.75 kHz
Current Consumption (High-Perf)490 µA
Current Consumption (Low-Power)230 µA
Low-Pass Filter Cutoff24 kHz
Channel SelectionLeft/Right Selectable
Board Dimensions16.8 mm x 13 mm

Frequently Asked Questions

What is the operating voltage range for the ICS-43434 module?

The module operates from 1.6V to 3.6V DC. This range makes it directly compatible with 3.3V logic systems found on most modern microcontrollers like ESP32, Raspberry Pi Pico, and STM32. Ensure your power supply is within this range to prevent damage and ensure proper digital I2S signal levels.

How do I configure the module for left or right channel in a stereo setup?

Channel selection is configured via a solder Jumper or pin selection on the breakout board. By connecting the appropriate configuration pin to VCC or GND, you can set the module's I2S word select (WS) line to identify itself as the left or right channel. Refer to the board's pinout diagram for the specific control pin.

Does the built-in low-pass filter affect the audible frequency response?

No, the filter is designed to cut off frequencies above 24 kHz, which is above the human hearing range (typically 20 Hz–20 kHz). Its primary function is to prevent aliasing by eliminating ultrasonic noise and interference, thereby improving the clarity and fidelity of the captured audio signal within its specified 50 Hz to 15 kHz range.

What microcontrollers are compatible with this I2S microphone?

Any microcontroller with an I2S peripheral or bit-banged I2S support is compatible. This includes popular platforms like ESP32, ESP8266 (with software I2S), Raspberry Pi Pico (RP2040), STM32 series, and SAMD21 (Arduino Zero/Adafruit M0). Most provide libraries to easily interface with digital MEMS microphones for audio capture and processing.

Package Includes

  • 1 x ICS-43434 I2S MEMS Microphone Module Breakout Board
  • 1 x Header Pin Strip

Additional Information

Weight 0.003 kg
Dimensions 1.68 × 1.3 cm

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