MAX9814 High Performance Microphone AGC Amplifier Module with CMA-4544PF-W Electret Condenser Microphone for Audio Recording and Voice Processing
MAX9814 High Performance Microphone AGC Amplifier Module with CMA-4544PF-W Electret Condenser Microphone for Audio Recording and Voice Processing
MAX9814 AGC Amplifier Module with CMA-4544PF-W for Audio Recording
The MAX9814 high-performance AGC amplifier module, paired with the CMA-4544PF-W electret condenser microphone, offers a practical solution for capturing clear audio in voice-controlled devices, audio recorders, and DIY projects. Automatic gain control adjusts the recording level in real-time, reducing the need for manual volume adjustments and preventing distortion from sudden loud sounds. With three gain settings, programmable timing, and low harmonic distortion, this module supports reliable audio capture in a compact form factor.
Features and Construction
The module is built around the MAX9814 AGC amplifier, which includes all necessary functions for signal conditioning. It is designed for easy integration into electronic circuits that require a microphone input.
Automatic Gain Control
The AGC circuit continuously monitors the incoming audio signal and adjusts gain to maintain a consistent output level. This prevents clipping from loud peaks and ensures quieter sounds remain audible, making it suitable for speech recognition and voice recording.
Gain and Timing Options
Three gain settings – 40dB, 50dB, and 60dB – allow selection based on the expected sound level. The programmable action time and release time ratio let users fine-tune how quickly the gain changes in response to volume shifts, providing flexibility for different acoustic environments.
Low Distortion and Shutdown
Total harmonic distortion is typically 0.04%, contributing to clean audio capture. A low-power shutdown mode reduces power consumption when the microphone is not in use, extending battery life in portable applications.
Uses and Placement
The module is suited for any project requiring reliable audio input with minimal manual control. Its compact design allows it to be placed in enclosures for voice interfaces, sound triggers, or recording devices.
Voice-Controlled Systems
In voice-activated assistants or smart switches, the AGC maintains consistent audio levels even when the user is at varying distances from the microphone, improving recognition accuracy.
Audio and Environmental Recording
For field recorders or sound monitors, the module’s low noise and distortion help capture clear audio tracks. The programmable timing can be adjusted to react slowly in quiet spaces or quickly in dynamic settings.
Benefits and Buying Value
The MAX9814 module combines automatic level adjustment with flexible gain and timing, reducing setup complexity. It offers a straightforward way to add professional-grade microphone input to electronic projects.
Ease of Integration
The module requires only a power supply and output connection to begin capturing audio. Its low component count and standard pin layout simplify wiring into breadboards or custom PCBs.
Reliable Performance
With low THD and a built-in 2V bias for the electret microphone, the module delivers clean signal output. The AGC reduces the risk of recording failures due to unexpected loud noises or soft speech.
