Description:

The MAX9814 Amplifier Module is a low-cost, high-performance microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. The MAX9814 Amplifier Module has a low-noise front-end amplifier, variable gain amplifier (VGA), output amplifier, microphone bias voltage generator and AGC control circuit An external resistive divider controls the AGC threshold and a single capacitor programs the attack/release times. A tri-level digital input programs the ratio of attack-to-release time. The hold time of the AGC is fixed at 30ms. The low-noise microphone-bias-voltage generator can bias most electric microphones.

Specifications:

• Supply Voltage: 2.7v – 5.5v @ 3mA current
• Output: 2Vpp on 1.25V bias
• Frequency Response: 20Hz 20 KHz
• Low Input-Referred Noise Density of 30nV
• Low THD: 0.04% (typical)

Features:

• Automatic Gain Control (AGC).
• Programmable action time.
• Programmable action and release time ratio.
• Low-power shutdown mode.
• MAX9814 Amplifier Module has built-in 2 Volt low noise microphone bias.

Applications:

• High-Quality Portable Recorders
• IP Phones/Telephone Conferencing
• Bluetooth Headsets
• Two-Way Communicators

Package Included:

1 x MAX9814 Amplifier Module MAX9814 High Performance Microphone AGC Amplifier Module