SB040402025 – MICROPHONE SCHEMATIC BLOCK

This schematic block features the ICS-40720, a high-performance analog MEMS microphone from TDK-InvenSense designed for clear, low-noise acoustic capture in voice, environmental monitoring, and general audio applications. As an omnidirectional microphone with excellent sensitivity and a low noise floor, the ICS-40720 provides a clean analog output suitable for direct interface to preamplifiers, ADCs, or audio front-ends.

Housed in a compact top-port MEMS package, this breakout-style module exposes the microphone output, bias pin, and ground connections in a clean layout optimized for low-noise signal routing. With a 67 dB SNR, −38 dBV/Pa sensitivity, and a 100 Hz–10 kHz frequency response, the ICS-40720 delivers reliable performance in both near-field and far-field sound capture scenarios.

The ICS-40xxx MEMS microphone family has earned broad adoption in consumer and embedded systems due to its durability, stable performance, and long production availability.

Key Features:

• ICS-40720 analog MEMS microphone, omnidirectional
• 67 dB signal-to-noise ratio (SNR)
• −38 dBV/Pa typical sensitivity
• Wide 100 Hz–10 kHz frequency response
• Stable analog output compatible with op-amps, ADCs, and audio front-ends
• Low power consumption for battery-powered systems
• Compact top-port MEMS package for easy mechanical integration
• Breakout designed for low-noise routing and fast prototyping

Typical Applications:

• Voice recognition and audio detection systems
• Environmental sound monitoring and noise sensing
• IoT audio nodes and smart devices
• Robotics and sound localization
• Portable electronics and handheld instruments
• General-purpose acoustic capture in embedded designs

By integrating this Quickboards schematic block, engineers can rapidly prototype analog audio input stages, reduce design complexity, and rely on a proven MEMS microphone architecture well-suited for modern embedded audio systems.