MAX9814 Microphone Amplifier Module

The MAX9814 Microphone Amplifier Module is a high-performance audio amplification solution featuring Automatic Gain Control (AGC) technology for consistent sound level output, regardless of input variations. This makes it ideal for voice recognition, audio recording, and sound-sensing applications in embedded systems.

The module integrates a low-noise microphone bias circuit, ensuring clear sound capture, along with programmable attack/release times and selectable gain levels of 40dB, 50dB, or 60dB, offering flexibility for various sound environments.

Operating within a 2.7V to 5.5V supply range, it consumes minimal power and features a low-power shutdown mode. The built-in CMA-4544PF-W microphone capsule ensures high sensitivity and reliability across a wide temperature range of -40°C to +85°C.

✅ Key Features:

• Automatic Gain Control (AGC) for stable output levels.
• Three selectable gain settings: 40dB, 50dB, 60dB.
• Low input noise density (30nV/√Hz) for clear audio.
• Low Total Harmonic Distortion (0.04% typical).
• Built-in low-noise microphone bias (2V).
• Programmable attack/release times and ratios.
• Wide voltage supply: 2.7V – 5.5V.
• Low-power shutdown mode for energy saving.
• Compact 14-pin TDFN (3mm x 3mm) package.

✅ Applications:

• Voice recognition systems.
• Audio recording and sound level monitoring.
• Sound-activated switches and alarms.
• DIY electronics, Arduino, and Raspberry Pi projects.
• Industrial and consumer audio equipment.

✅ Technical Specifications:

• Operating Voltage: 2.7V – 5.5V
• Gain Options: 40dB / 50dB / 60dB
• Microphone Bias: 2V (Low Noise)
• Input Noise Density: 30nV/√Hz
• THD: 0.04% (typ.)
• Temperature Range: -40°C to +85°C
• Built-in microphone: CMA-4544PF-W
• Package: TDFN-14 (3mm x 3mm)

✅ Packing List:

• 1x MAX9814 Microphone Amplifier Module

✅ FAQ:

Q1: Does this module have automatic gain control?
A1: Yes, the built-in AGC adjusts the output level automatically based on the sound intensity.

Q2: Can I use this with Arduino or Raspberry Pi?
A2: Absolutely. It’s compatible with most microcontrollers.

Q3: Is the microphone included?
A3: Yes, the module includes the CMA-4544PF-W microphone capsule.