MAX4466 Electret Microphone Amplifier Module Adjustable Gain Arduino

🔧 MAX4466 Electret Microphone Amplifier Module | AuscomTech

This MAX4466 electret microphone amplifier module is a compact analog audio preamplifier board designed for sound detection, voice input, and microphone signal conditioning.

It amplifies low-level electret microphone signals and outputs an analog audio signal through the OUT pin for use with microcontrollers, ADC inputs, and embedded audio circuits.

Typical use includes Arduino sound sensing, speech recognition projects, audio sampling, hearing-related electronics, digital repeaters, and portable electronics.

⭐ Key Features

• Adjustable Gain – onboard gain adjustment allows the microphone signal level to be tuned for different applications.
• Wide Supply Range – operates from 2.4V to 5.5V DC for compatibility with common development boards.
• Analog Audio Output – OUT, GND, and VCC pin layout makes connection simple for ADC-based sound sensing.
• Low Power Operation – static supply current is less than 24µA, suitable for battery-powered projects.
• High Noise Rejection – designed with strong power supply and common mode rejection for cleaner signal performance.
• Compact PCB – small module size allows easy installation in space-limited electronics builds.

📊 Technical Specifications

• Main IC: MAX4466
• Microphone Type: Electret condenser microphone
• Supply Voltage: 2.4V to 5.5V DC
• Output Type: Analog audio signal
• Pins: OUT, GND, VCC
• Power Supply Rejection Ratio: 112dB
• Common Mode Rejection Ratio: 126dB
• Open Loop Gain: 125dB
• Gain Bandwidth: 600kHz
• Static Current: less than 24µA
• Operating Temperature: -40°C to +85°C
• Board Size: approx. 20.8 × 13.8 × 7.5mm

🧩 Typical Applications

• Arduino sound detection projects
• STM32 audio input circuits
• Raspberry Pi compatible sensor projects
• Speech recognition systems
• Digital repeaters
• Portable electronics
• Microphone preamplifier circuits
• Hearing aid and headset development

⚠️ Important Notes

• This module provides an analog output and should be connected to an ADC-capable input.
• For Arduino UNO, OUT can be connected to an analog input such as A0.
• Check supply voltage and wiring before applying power.
• Microcontroller board and jumper wires are not included.

📦 Package Includes

• 1 × MAX4466 Electret Microphone Amplifier Module
• 1 × Pin Header

🔗 Recommended Accessories (Not Included)

• Arduino UNO compatible board – analog sound sensing projects
• Jumper wires – quick connection to development boards
• Breadboard – temporary prototyping and testing
• Dupont header cables – module-to-controller wiring