MAX9814 Microphone AGC Amplifier Module for Arduino
The MAX9814 electret microphone module includes automatic gain control (AGC) that continuously adjusts amplification to keep the output signal level constant regardless of whether the sound source is close or far away — eliminating manual gain tuning. Output is a 2Vpp analogue signal centred at VCC/2, directly readable by an Arduino ADC for sound level measurement, FFT analysis, or audio recording. Attack and release times for the AGC are set by onboard capacitors.
- AGC automatic gain control — consistent output level for quiet and loud sounds
- 2Vpp analogue output — centred on VCC/2, direct ADC connection
- 40dB gain at minimum — suitable for capturing speech at 1–2 metres
- Onboard electret microphone — omnidirectional, broad frequency response
- 2.7V–5.5V supply — compatible with Arduino and ESP32
| Specification | Value |
|---|---|
| Chip | MAX9814 (Maxim) |
| Gain range | 40dB – 60dB (AGC controlled) |
| Output | 2Vpp analogue, VCC/2 bias |
| Supply voltage | 2.7V – 5.5V |
| Frequency response | 20Hz – 20kHz |
Best for
Arduino audio level meters, ESP32 voice activity detection, sound-activated recording, FFT spectrum analyser projects, acoustic event loggers, and any application where consistent audio level regardless of distance matters.
Why Kunkune
Shipped from UK stock. 60-day returns, no minimum order. Fast Royal Mail delivery.
Buying in bulk? For orders of 10+ units, contact us for trade pricing.
