【High-Gain Microphone Amplifier for Voice Control & Audio Projects】 This high-gain microphone amplifier (MAX4466) is Suitable for voice control systems, sound detection, and audio signal conditioning. With a wide voltage range of 2.4V–5.5V DC, it's compatible with both 3.3V and 5V systems. Suitable for Arduino and STM32 projects, this module offers software-adjustable gain and built-in RF interference suppression for clean audio output.
【Low Noise & High Sensitivity for Clear Sound Capture】 Engineered for clarity, this electret microphone preamplifier delivers a remarkable 94dB SNR and a frequency response of 20Hz–20kHz, covering the full human audible range. Its low quiescent current (24µA) ensures energy efficiency, while the adjustable sensitivity potentiometer lets you fine-tune performance for different microphones and s.
【Easy Integration with Development Boards & ADC Systems】 Designed for seamless integration, this module connects directly to microcontrollers like Arduino or STM32 without needing external amplifiers. The analog output (0.1V–1.5V + 0.5×VCC DC bias) is ready for ADC input, and it supports both 3.3V and 5V systems with proper reference voltage settings.
【Reliable Performance in Harsh Conditions】 Built to last, this microphone amplifier operates reliably from -40°C to +85°C, making it suitable for outdoor and industrial applications. Its modular PCB design includes a sensitivity adjustment potentiometer, ensuring consistent performance across various electret microphones and al conditions.
【Troubleshooting Tips & User-Friendly Design】 Whether you're building a decibel meter, voice recognition system, or security monitoring device, this module comes with detailed setup guides and troubleshooting tips. From reducing background noise to preventing signal saturation, it's designed for ease of use and long-term reliability in your audio projects.
وصف
product parameters
Core Chip :MAX4466(Maxim Integrated Original Microphone Amplifier)
supply voltage :2.4V-5.5V DC (wide voltage compatible, support 3.3V/5V system)
gain range of :60dB (software adjustable via external resistor)
frequency response of :20Hz-20kHz(± 3dB, covering human audible range)
SNR of: 94dB (typical @ 5V power supply)
Quiescent Current of :24 μA (Low Power Standby)
Output signal of: analog voltage (DC bias = 0.5 ×VCC, amplitude 0.1V-1.5V)
input impedance of :>100kΩ (directly connected to electret microphone)
Operating temperature of :-40°C ~ +85°C (industrial grade)
package form : modular PCB (with sensitivity adjustment potentiometer)
product main pin function
VCC: positive pole of power supply (4.4V-5.5V DC, 10μF electrolytic capacitor + 0.1μF ceramic capacitor to be connected in parallel)
GND: power ground (must be independently analog ground, away from digital noise)
OUT: Analog signal output:
Output range: 0.1V-1.5V (dynamic amplitude) +0.5 ×VCC (DC bias)
Connect MCU ADC pin (1kΩ resistor protection in series is recommended)
GAIN: gain adjustment terminal (connect to middle pin of potentiometer, rotate clockwise ↑ gain)
MIC + : electret microphone positive (module has integrated bias resistor)
MIC- : Electret Microphone Negative (GND)
Interface Note :
During long-distance transmission, the OUT signal line needs to be shielded
When supplying power to a 5V system, the ADC reference voltage needs to be set to 2.5V (to avoid saturation)
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