ICS-43434 I2S 3.3V MEMS Microphone Module Breakout with Low Pass Filter Mini-moduleDescriptionListen to the good news – we now have a super small breakout board for the ICS43434 I2S MEMS microphone. Like traditional electret microphones, MEMS microphones can detect sound and convert it into a signal, but they are smaller and thinner. This microphone is not analog; it is purely digital. The I2S output provides high-quality digital audio without the need for analog-to-digital conversion.The ICS43434 is a small, low-cost MEMS microphone with a frequency range of approximately 50Hz to 15kHz, making it suitable for general-purpose audio recording and sound detection applications. The chip includes a built-in low-pass filter that attenuates frequencies above 24kHz.For many microcontrollers, adding audio input is straightforward using analog microphones. However, as you move to more advanced microcontrollers and microcomputers, analog inputs may not be available, or you may wish to avoid noise associated with analog signal paths. Beyond 8-bit microcontrollers, digital audio interfaces like I2S are commonly available. This is where the I2S MEMS microphone excels.Instead of an analog output, this microphone provides three digital pins: clock, data, and word select (left/right clock). When connected to a microcontroller or processor, the I2S controller generates the clock and word select signals and reads the digital audio data from the microphone. No analog-to-digital conversion is required.This microphone is a mono device. You can select the channel configuration (left or right) by connecting the select pin to power or ground. For stereo applications, use two microphones. They can be synchronized by sharing the clock and word select lines, while each microphone maintains its own data line. No firmware or driver configuration is needed, and the microphone delivers 24-bit audio data immediately upon startup.The microphone has a bottom port, so ensure there is a clear acoustic path from the bottom of the board to the sound source. It operates at 1.6V to 3.6V and is not compatible with 5V logic levels. Most entry-level microcontroller boards may not support I2S, so verify interface compatibility before integration.This I2S MEMS microphone works best with modern microcontrollers such as SAMD21, SAMD51, ESP32, RP2040, RP2350, and Raspberry Pi platforms.Specifications- Sensitivity: -26 dBFS ±1dB - High performance mode SNR: 65 dBA - Low power mode SNR: 64 dBA - High performance mode current consumption: 490 µA - Low power mode current consumption: 230 µA - Maximum Acoustic Overload Point (AOP): 120 dB SPL - High performance mode sampling rate: 23 kHz to 51.6 kHz - Low power mode sampling rate: 6.25 kHz to 18.75 kHz