MAX9814 Microphone Amplifier Module with Auto Gain Control

Features:

• The MAX9814 Microphone Amplifier Module with Auto Gain Control (AGC) is a compact audio amplification module that enhances microphone signals while automatically adjusting the gain to maintain consistent output levels.
• This module is ideal for sound detection, voice recognition, and audio recording applications, offering easy integration and adjustable gain control.
• It features low-noise operation and can be powered by 3.3V or 5V, making it compatible with platforms like Arduino and Raspberry Pi.
• The built-in AGC ensures that audio signals, even with varying volumes, remain clear and balanced.

Specifications:

• 3 kinds of gain settings (40dB, 50dB, 60dB)
• Supply Voltage: 2.7v – 5.5v @ 3mA current
• Output: 2Vpp on 1.25V bias
• Frequency Response: 20Hz – 20 KHz
• Low Input-Referred Noise Density of 30nV
• Low THD: 0.04% (typical)
• Automatic Gain Control (AGC)
• programmable action time
• programmable action and release time ratio
• Low-power shutdown mode
• Built-in 2 Volt low noise microphone bias
• Size: 26 x 14 x 11mm

Applications:

• Speech Recognition
• Bluetooth Headsets
• Two-Way Communicators
• High-Quality Portable Recorders
• IP Phones/Telephone Conferencing

Schematic Diagram:

Documents

• MAX9814 Datasheet