MAX9814E+

Overview

The MAX9814E+ is a high-quality microphone amplifier featuring automatic gain control (AGC) and a low-noise internal microphone bias. It operates over a 2.7V to 5.5V supply range and simplifies audio capture by automatically adjusting gain to maintain a consistent output level despite varying input volumes.

Why Choose This Part

This IC offers three selectable gain settings (40dB, 50dB, 60dB) and programmable attack and release ratios to fine-tune the AGC response. Its low input-referred noise density of 30nV/vHz and internal 2V bias make it a complete, space-saving solution in a 14-pin TDFN package.

Applications

Getting Started

Engineers often prototype with the MAX9814 breakout boards available from Adafruit or SparkFun for quick evaluation. When designing a custom PCB, ensure the gain-select pin is tied to VDD, GND, or left floating to set the desired base gain, and select the capacitor values for the AGC timing based on your specific acoustic environment.

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