Digital Output I2S MEMS Microphone - SPH0645LM4H

Overview

The Digital Output I2S MEMS Microphone - SPH0645LM4H from Knowles is a high-performance, low-power digital microphone that delivers pristine audio capture without the need for analog-to-digital conversion. Its I2S digital output interface makes it remarkably easy to integrate with modern microcontrollers like ESP32, STM32, and Raspberry Pi, providing a direct, noise-immune path for your audio data. Whether you're building a voice-controlled assistant, a sound-level meter, or a robotics project that needs to 'hear' its environment, this compact MEMS microphone offers exceptional clarity and reliability in a tiny form factor.

Key Features

• Digital I2S Output: Direct digital data transmission eliminates the need for an external ADC, simplifying your circuit design and reducing noise.
• Wide Frequency Response: Captures a broad range from 50Hz to 15kHz, suitable for voice and general audio sensing.
• Compact & Lightweight: Tiny MEMS package (3.5mm x 2.65mm x 0.98mm) fits easily into space-constrained designs.
• Low Power Consumption: Ideal for battery-powered and portable applications.
• High SNR: Delivers clear audio with a high signal-to-noise ratio for reliable detection.
• Easy Integration: Compatible with popular development boards and microcontrollers that support I2S.

Technical Specifications

• Manufacturer: Knowles
• Part Number: SPH0645LM4H
• Output Interface: I2S (Inter-IC Sound)
• Frequency Response: 50Hz - 15kHz
• Sensitivity: -26 dBFS (typical)
• Signal-to-Noise Ratio (SNR): 61 dB (typical)
• Power Supply: 1.6V - 3.6V DC
• Current Consumption: ~600 µA (typical)
• Dimensions: 3.5mm × 2.65mm × 0.98mm
• Mounting Type: Surface Mount (SMD)

Applications & Use Cases

• Voice Recognition Systems: Ideal for wake-word detection and voice commands in smart home projects.
• Audio Recording: Capture high-quality audio for field recording, sound effects, or podcasting projects.
• Sound-Level Monitoring: Build environmental noise monitors or sound-triggered devices.
• Robotics: Enable robots to respond to audio cues or claps.
• IoT Devices: Integrate audio sensing into smart devices for interactive features.
• Educational Projects: Perfect for learning digital audio processing and embedded systems.

What's Included

• 1x Digital Output I2S MEMS Microphone - SPH0645LM4H (pre-soldered on a breakout board with pin headers for easy breadboard use)
• (Note: The sensor is shipped on a small PCB with pins, ready for connection.)

Compatibility

• Microcontrollers with I2S peripheral: ESP32, ESP8266, STM32, Raspberry Pi (via GPIO), Teensy, and more.
• Works with Arduino IDE, PlatformIO, and other development environments.
• No external ADC required; connect directly to your MCU's I2S pins.

MOKWN Recommendation

For makers and engineers in Egypt, the SPH0645LM4H is a top choice for adding high-quality audio input to your projects. Its digital output ensures clean signal transfer, and its compatibility with popular boards like ESP32 makes it a versatile addition to your toolkit. Whether you're prototyping a voice-controlled device or a sound-reactive installation, this microphone delivers professional-grade performance at an affordable price. Order today and start building with crystal-clear audio!

Need help with your project? Our team at MOKWN is here to support you with technical guidance and fast delivery across Egypt.