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
