ICS-43434 digital I2S MEMS microphone

The ICS-43434 is a high-performance, low-power digital MEMS microphone featuring an I²S output interface, designed for audio capture, voice recognition, and sound sensing applications. Manufactured by TDK InvenSense, this compact and reliable microphone directly outputs digital audio data, eliminating the need for an external ADC — simplifying design and improving signal quality.

The ICS-43434 offers high signal-to-noise ratio (SNR), wide dynamic range, and excellent acoustic performance in a small package. It supports a pulse density modulated (PDM) interface internally and delivers digital I²S output, making it easy to interface with modern microcontrollers and DSPs.

With its bottom-port configuration, low power consumption, and robust performance, this MEMS microphone is ideal for smart speakers, IoT devices, voice assistants, and robotics projects requiring accurate sound input.

Key Features:

• Type: Digital MEMS Microphone with I²S output

• High SNR: 65 dB (typical)

• Frequency Response: 50 Hz – 20 kHz

• Low Power Operation: 650 µA (active mode)

• Omnidirectional sensitivity for clear, consistent sound capture

• Integrated ADC – no external conversion needed

• Bottom-port design for easy PCB mounting

• Compact 3.5 × 2.65 × 0.98 mm package

• Compatible with Arduino, Raspberry Pi, ESP32, and STM32