MAX4466 Electret Microphone Amplifier Module with Adjustable Gain

The MAX4466 Electret Microphone Amplifier with Adjustable Gain Module is a fully assembled and tested board that comes with a 20-20KHz electret microphone soldered on. It features the Maxim MAX4466 op-amp, which is specifically designed for amplifying sound signals from a microphone. Here are the features and specifications:

  Features:  

• Supply Voltage Operation: +2.4V to +5.5V
• Excellent Power-Supply Rejection Ratio: 112dB
• Excellent Common-Mode Rejection Ratio: 126dB
• High AVOL: 125dB (RL = 100k„¦)
• Rail-to-Rail Outputs
• Low 24µA Quiescent Supply Current
• Gain Bandwidth Product: 600kHz
• Available in Space-Saving Packages: 5-Pin SC70, 8-Pin SOT23

  Specifications:  

• Model: MAX4466
• Input Voltage: 2.4 – 5.5V
• Input Current: 24µA
• Gain Bandwidth Product: 600kHz
• Phase Margin: 70 Degrees
• Gain Margin: 20dB
• Dimensions: 20 x 14 x 8mm
• Weight: 2g

  How to Use:  

1. Connect GND to ground, VCC to 2.4-5VDC.
2. The audio waveform will come out of the OUT pin. The output will have a DC bias of VCC/2, so when it's perfectly quiet, the voltage will be a steady VCC/2 volt (DC coupled).
3. If the audio equipment requires AC-coupled audio, place a 100uF capacitor between the output pin and the input of your device.
4. If connecting to an audio amplifier with differential inputs or includes decoupling capacitors, the 100uF cap is not required.
5. The output pin is not designed to drive speakers or anything but the smallest in-ear headphones. You'll need an audio amplifier if you want to connect it directly to speakers.
6. If connecting to a microcontroller pin, you don€™t need an amplifier or decoupling capacitor; connect the OUT pin directly to the microcontroller ADC pin.
7. For audio-reactive projects, consider using an FFT driver library to translate the audio input into frequencies.

  Package Includes:  

• 1 x MAX4466 Electret Microphone Amplifier with Adjustable Gain Module
• 1 x Header Set (Without Soldered)