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Product description: ICS43434 MEMS Microphone with I2S Interface - Adafruit 6049
The ICS43434 is an ultra-thin digital MEMS microphone with an I2S interface that converts audio directly to digital data , eliminating the need for analog conversion and minimizing interference. A frequency range of 50 Hz to 15 kHz and a built-in low-pass filter ensure clear audio. With a digital I2S output, the microphone supports three signals: Clock, Data, and Word Select , allowing easy connection to Cortex M-series microcontrollers (SAMD21, SAMD51, ESP32, RP2040, RP2350) or minicomputers such as the Raspberry Pi . The user can select the channel (left/right) using the Select pin, and using two microphones can achieve full stereo. The microphone has a bottom-mounted port - the microphone opening should be pointed towards the sound source. It operates within a voltage range of 1.6 V to 3.6 V and is not designed for 5 V logic . The module provides instant 24-bit output without the need for firmware or driver configuration.
ICS43434 MEMS microphone with I2S interface - Adafruit 6049. 
The ICS43434 microphone is an ultra-thin digital MEMS microphone with an I2S interface that converts sound directly into digital data.Special features of the module
- Microphone type: Digital MEMS with I2S interface for pure digital signal processing
- Recording frequency range: 50 Hz to 15 kHz, ideal for general sound recording and detection
- Digital output: I2S, no analog signal, eliminating interference typical of analog microphones
- Channel selection: left or right, set by the Select pin, allows flexible stereo configurations
- Microphone direction: bottom port - the opening is directed directly towards the sound source for better recording quality
- Supply voltage: 1.6V to 3.6V, compatible with most microcontrollers and single-board computers
Practical applications
- Sound recording and audio recording in embedded projects
- Voice control and sound recognition
- IoT systems requiring interference-free digital audio input
- Recording for educational and hobby projects
- Integration with single-board computers and microcontrollers
Technical specifications of the module
- Operating voltage: 1.6 V to 3.6 V
- Operating range: 50 Hz to 15 kHz
- Communication interface: digital I2S
- Microphone sensitivity: -26 dB FS ±1 dB
- Signal-to-noise ratio (SNR): 65 dBA in high-performance mode, 64 dBA in low-power mode
- Current consumption: 490 µA in High Performance mode, 230 µA in Low Power mode
- Maximum sound level: 120 dB SPL
- Sampling frequency range: 23 kHz to 51.6 kHz (High Performance), 6.25 kHz to 18.75 kHz (Low Power)
- Dimensions: 16.51 x 12.7 mm
Contents of the set
- 1x ICS43434 MEMS microphone with I2S interface
A frequency range of 50 Hz to 15 kHz and a built-in low-pass filter ensure clear sound. 
