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Small green circuit board with microphone and gold pins

Ruth's sister

Ruth's sister MAX9814 Microphone Amplifier Module internal power cable

SKU CH-JY13-QTXEZ

A microphone amplifier module with automatic gain control offering 40, 50 and 60 dB settings, programmable attack and release timing, 0.04% THD and a 2.7 to 5.5 V supply range

  • Auto gain control adjusts levels automatically
  • Three selectable gain settings: 40, 50, 60 dB
  • Programmable attack and release time ratio
  • Low distortion of .04 % typical THD
  • Operates from 2.7 to 5.5 V supply

MAX9814 Microphone Amplifier Module

This MAX9814 microphone amplifier module provides automatic gain control with three selectable gain settings of 40dB, 50dB, and 60dB. It operates on a power supply voltage range of 2.7V to 5.5V and features low THD of 0.04%. The board includes a built-in 2V low-noise microphone bias and programmable attack and release time ratios for Arduino projects.

Simple wiring for Arduino integration

The module connects to an Arduino using standard power, ground, and signal pins for quick prototyping. Ensure the supply voltage stays within the 2.7V to 5.5V range to avoid damage. A common issue is incorrect gain jumper selection leading to clipping or insufficient signal level. Verify the programmable attack and release timing matches your specific audio application requirements.

Check power supply and microcontroller compatibility

Before ordering, confirm your microcontroller can interface with the module's output signal level and logic voltage. The board requires a stable power source within the 2.7V to 5.5V range with low noise for optimal performance. Ensure your enclosure has space for the module and microphone placement. Buyers needing integrated ADC or digital audio output should consider alternative solutions.

Highlights

  • Auto gain control adjusts levels automatically
  • Three selectable gain settings: 40, 50, 60 dB
  • Programmable attack and release time ratio
  • Low distortion of .04 % typical THD
  • Operates from 2.7 to 5.5 V supply

Specifications

No published specifications for this item yet.

Questions about this item

How do I verify the module is amplifying correctly after wiring it?

Measure the output while speaking into the microphone; the gain should sit at one of the three fixed settings — 40 dB, 50 dB or 60 dB — and distortion should be around 0.04 %.

What comes with the module and what must I source separately?

The board includes the MAX9814 amplifier, AGC circuitry and a 2 V low-noise microphone bias; you must supply a microphone capsule, a 2.7 V–5.5 V power source and wiring to your Arduino or other MCU.

Which gain setting — 40 dB, 50 dB or 60 dB — should I choose for my application?

Start at 50 dB for general-purpose recording; drop to 40 dB if the source is loud or clipping occurs, or raise to 60 dB for very quiet sources needing maximum sensitivity.

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