General Description
The MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and low noise microphone bias. The device features a low-noise preamplifier, variable gain amplifier (VGA), output amplifier, microphone-bias-voltage generator and AGC control circuitry.

FEATUREs
♦Automatic Gain Control (AGC)
♦Three Gain Settings (40dB, 50dB, 60dB)
♦Programmable Attack Time
♦Programmable Attack and Release Ratio
♦2.7V to 5.5V Supply Voltage Range
♦Low Input-Referred Noise Density of 30nV/√Hz
♦Low THD: 0.04% (typ)
♦Low-Power Shutdown Mode
♦Internal Low-Noise Microphone Bias, 2V
♦Available in the Space-Saving, 14-Pin TDFN (3mm x 3mm) Package
♦-40°C to +85°C Extended Temperature Range

APPLICATIONs
Digital Still Cameras
Digital Video Cameras PDAs
Bluetooth Headsets
Entertainment Systems (e.g., Karaoke)
Two-Way Communicators
High-Quality Portable Recorders
IP Phones/Telephone Conferencing