MAX4466 Electret Microphone Amplifier Module with Adjustable Gain

The MAX4466 Electret Microphone Amplifier Module is a high-quality audio amplification solution designed for capturing precise sound signals in various applications. This module features an on-board electret microphone capable of detecting audio frequencies ranging from 20Hz to 20kHz, making it suitable for a wide array of audio projects. At its core, the module utilizes the Maxim MAX4466 operational amplifier, specifically engineered for microphone preamplification tasks. This op-amp offers excellent power supply noise rejection, ensuring clear and low-noise audio output, which is essential for high-fidelity audio recording and processing. A notable feature of this module is its adjustable gain control, facilitated by a trimmer potentiometer located on the back of the board.

MAX4466 Electret Microphone Amplifier Module allows Users to fine-tune the gain from 25x to 125x, ensuring flexibility in various audio input scenarios. This adjustability ensures compatibility with different devices, whether interfacing with microcontroller analog-to-digital converters (ADCs) or feeding into line-level inputs of audio processing equipment. The module operates efficiently within a supply voltage range of 2.4V to 5.5V, making it versatile for integration into both 3.3V and 5V systems. Its rail-to-rail output capability ensures that the output signal maximizes the dynamic range, providing a robust audio signal for further processing or amplification. The compact design and high performance of the MAX4466 Electret Microphone Amplifier make it an excellent choice for projects requiring reliable and adjustable audio input amplification.

Features:

• +2.4V to +5.5V Supply Voltage Operation
• Excellent Power-Supply Rejection Ratio: 112dB
• Excellent Common-Mode Rejection Ratio: 126dB
• High AVOL: 125dB (RL = 100kΩ)
• Rail-to-Rail Outputs
• Low 24µA Quiescent Supply Current