Adafruit I2S MEMS Microphone Breakout – ICS43434

The ICS43434 I2S MEMS Microphone is a compact digital microphone that significantly outperforms traditional electret microphones in both size and functionality. Designed for easy integration, it captures audio frequencies from 50Hz to 15KHz and features a built-in low-pass filter that effectively eliminates frequencies above 24KHz, enhancing audio quality. This microphone connects to microcontrollers with I2S peripherals via three digital pins: Clock, Data, and Left-Right (Word Select) Clock, which simplifies integration by eliminating the need for analog conversion. Users can configure it for mono output (left or right channel) or use two microphones for stereo applications, sharing the Clock, Data, and WS lines.

Operating at a voltage range of 1.6V to 3.6V, the ICS43434 is not suitable for 5V logic systems, so it’s essential to ensure compatibility with your microcontroller. Ideal for Cortex M-series chips (like SAMD21, SAMD51, ESP32, RP2040) and single-board computers such as the Raspberry Pi, this microphone breakout is perfect for makers and developers looking to add high-quality audio input capabilities to their projects in a compact and efficient package.

Features:

1. Compact Size: Smaller than traditional electret microphones, making it ideal for space-constrained applications.
2. Frequency Range: Captures audio frequencies from 50Hz to 15KHz, suitable for general audio recording and detection.
3. Built-in Low-Pass Filter: Eliminates frequencies above 24KHz, enhancing overall audio quality.
4. Digital Output: Connects to microcontrollers with I2S peripherals using three digital pins: Clock, Data, and Left-Right (Word Select) Clock, eliminating the need for analog conversion.
5. Mono and Stereo Output Options: Configurable for mono output (left or right channel) or stereo applications by using two microphones and sharing the Clock, Data, and WS lines.
6. Operating Voltage: Functions within a voltage range of 1.6V to 3.6V, making it unsuitable for 5V logic systems.
7. Easy Integration: Compatible with Cortex M-series chips (like SAMD21, SAMD51, ESP32, RP2040) and single-board computers such as the Raspberry Pi.
8. User-Friendly Design: Simplifies audio input integration for various projects while maintaining high audio quality.

Specifications:

1. Sensitivity: −26 dB FS ±1 dB
2. SNR (High Performance Mode): 65 dBA
3. SNR (Low Power Mode): 64 dBA
4. Current Draw (High Performance Mode): 490 µA
5. Current Draw (Low Power Mode): 230 µA
6. Acoustic Overload Point (AOP): 120 dB SPL
7. Sample Rate (High Performance Mode): 23 ~ 51.6 kHz
8. Sample Rate (Low Power Mode): 6.25 ~ 18.75 kHz

Package Includes:

1 x Adafruit I2S MEMS Microphone Breakout – ICS43434