MAX4466 microphone amplifier with microphone 20-20kHz MAX4466

MAX4466 microphone amplifier with 20-20kHz microphone

The MAX4466 microphone amplifier, equipped with an electret microphone, delivers excellent sound quality across the 20 Hz - 20 kHz frequency range. The module allows smooth gain adjustment from x25 to x125 using a potentiometer located on the back of the board. The product is versatile and well suited for projects using microcontrollers - for Arduino, ESP8266, ESP32, and Raspberry Pi.

The amplifier has a rail-to-rail output coupled to the supply. Thanks to this design, in complete silence and at minimum gain, the output provides a stable voltage level equal to VCC/2. When connecting the module to devices with AC signal inputs, it is recommended to use a 100 uF capacitor between the amplifier output and the target device input, which ensures optimal quality of the transmitted signal.

Key technical specifications

• Amplifier IC: MAX4466
• Microphone type: electret
• Frequency response: 20 Hz - 20 kHz
• Gain adjustment: smooth, from x25 to x125
• Output voltage level in silence: VCC/2
• Recommended output capacitor for AC signals: 100 uF
• Compatibility: Arduino, ESP8266, ESP32, Raspberry Pi

Example applications

• Environmental sound level detection and analysis systems
• Smart lighting projects that react to music
• Audio recorders and simple voice communication systems
• Sound-based control interfaces in building automation
• Compact noise level meters

Benefits

• High sensitivity and very good quality of captured audio
• Easy adjustment of module parameters to project needs thanks to the built-in potentiometer
• Simple and fast integration with popular development platforms
• Compact dimensions allowing installation in space-constrained devices
• Stable output voltage facilitating precise signal readout by analog-to-digital converters