Max4466 Electret Microphone Amplifier With Adjustable Gain Module

The MAX4466 Electret Microphone Amplifier with Adjustable Gain Module is a pre-assembled and tested board that comes equipped with a 20-20KHz electret microphone soldered onto it. Here are some key features and details about this amplifier module:

**1. Maxim MAX4466 Op-Amp:**
– The module utilizes the Maxim MAX4466, which is an operational amplifier (op-amp) specifically designed for amplifying electret microphones. The MAX4466 offers excellent power supply noise rejection, resulting in high-quality sound with minimal noise.

**2. Electret Microphone:**
– The module comes with a 20-20KHz electret microphone pre-soldered onto the board. Electret microphones are commonly used in audio applications for their sensitivity and reliability.

**3. Adjustable Gain:**
– The amplifier features an adjustable gain for fine-tuning the amplification process. A small trimmer pot is provided on the back of the module for easy gain adjustment.

**4. Gain Range:**
– The gain can be adjusted within a range of 25x to 125x. This flexibility allows users to set the amplification level according to their specific project requirements.

**5. Versatile Applications:**
– Ideal for various projects, including voice changes, audio recording/sampling, and audio-reactive projects utilizing Fast Fourier Transform (FFT) analysis.

**6. Gain Adjustment Potentiometer:**
– The trimmer potentiometer on the back enables users to precisely set the gain for the desired signal level.

**7. Output Characteristics:**
– The output can be adjusted to be approximately 200mVpp for normal speaking volume about 6 inches away, suitable for devices expecting ‘line level’ input without clipping. It can also be set up to about 1Vpp, ideal for interfacing with a microcontroller’s analog-to-digital converter (ADC).

**8. Rail-to-Rail Output:**
– The output is rail-to-rail, allowing it to reach up to 5Vpp if the input sounds become loud. This ensures that the module can handle a wide range of audio input levels.

**9. Suitable for Microcontroller Interface:**
– With its adjustable gain and rail-to-rail output, the module is suitable for interfacing with microcontrollers, making it versatile for electronic projects.

**10. Audio Quality:**
– The module provides good sound quality with reduced noise and distortion compared to other microphone amplifier breakouts.

In summary, the MAX4466 Electret Microphone Amplifier with Adjustable Gain Module offers a flexible and high-quality solution for audio amplification projects, providing users with the ability to adjust gain levels for various applications in a convenient and reliable manner.