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Product Descriptions

MAX9814 is a low-cost high-performance microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. The device has a low-noise front-end amplifier, variable gain amplifier (VGA), output amplifier, microphone bias voltage generator, and AGC control circuit.

Product Features

Automatic Gain Control (AGC)

3 gain settings (40dB, 50dB, 60dB)

Programmable action time

Programmable action to release time ratio

Power supply voltage range 2.7V~5.5V

Low THD: 0.04% (typical value)

Low power shutdown mode

Built in 2V low-noise microphone bias

Product Pinouts

VCC: Power supply positive

GND: grounds

GAIN: Three state amplifier gain control:

GAIN=VDD， Set the gain to 40dB

GAIN=GND， Set the gain to 50db

GAIN=Suspended, gain set to 60db

OUT: amplifier output

AR: Three state startup and release ratio selection, controlling the startup time and release time ratio of the AGC circuit:

A/R=GND: The start/release ratio is 1:500

A/R=VDD: Start/release ratio of 1:2000

A/R=Suspended: Start/Release ratio of 1:4000

Product Functions

Product Show

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

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