MAX9814 Microphone Amp. Module

The MAX9814 Microphone Amplifier Module is a high-quality electret microphone breakout featuring Automatic Gain Control (AGC) for clear and consistent audio capture across varying sound levels. It is designed to amplify low-level microphone signals while automatically adjusting gain to prevent clipping and distortion. This makes it ideal for voice detection, audio recording, and sound-reactive projects using Arduino, ESP32, Raspberry Pi, and other microcontrollers.

Technical Specifications:

• Audio amplifier IC: MAX9814
• Microphone type: Electret condenser microphone
• Operating voltage: 2.7 V – 5.5 V
• Output type: Analog audio output
• Output amplitude: Up to ~2 Vpp (max)
• Gain settings:
• Gain pin floating: 60 dB
• Gain pin to GND: 50 dB
• Gain pin to VDD: 40 dB
• AGC: Built-in, selectable attack/release via AR pin
• DC offset: ~1.25 V
• Frequency response: Optimized for voice/audio
• PCB material: FR-4
• Mounting: 4 corner mounting holes

Features:

• Built-in Automatic Gain Control (AGC) for stable audio levels
• Clear voice pickup with low noise
• Selectable gain options (40 dB / 50 dB / 60 dB)
• Wide operating voltage range (3.3 V & 5 V compatible)
• Compact breakout board for easy prototyping
• Simple analog output compatible with ADC pins
• Ideal for real-time sound detection and recording

Applications:

• Voice recognition systems
• Sound level detection
• Audio recording projects
• IoT voice-enabled devices
• Robotics and interactive projects
• Noise monitoring systems
• DIY electronics and education kits