General Description

The MAX9812/MAX9813 are single/dual-input, 20dB fixed-gain microphone amplifiers. They offer tiny packaging and a low-noise, integrated microphone bias, making them ideal for portable audio applications such as notebook computers, cell phones, and PDAs. These amplifiers feature a 500kHz bandwidth, Rail-to-Rail? outputs, an industry-leading 100dB power-supply rejection ratio, and a very low 0.015 THD+N. Power-saving features include very low 230μA supply current and a total shutdown mode that cuts the combined supply and BIAS currents to only 100nA.

Features

?PC2001 Compliant

?100dB at 217Hz Power-Supply Rejection Ratio

?Very Low 230μA Quiescent Current

?Low 0.015 THD+N

?Available in Two Versions

MAX9812L/MAX9813L—2.7V to 3.6V

MAX9812H/MAX9813H—4.5V to 5.5V

?Internal Low-Noise Microphone Bias Supply

2.3V for MAX9812L/MAX9813L

4.0V for MAX9812H/MAX9813H

?100nA Low-Power Shutdown Mode

?Rail-to-Rail Outputs

?20dB Fixed Gain

?Available in Tiny 6-Pin SC70 (2mm x 2.1mm) and 8-Pin SOT23 (3mm x 3mm) Packages

?Extended Temperature Range -40°C to +85°C

Applications

Notebook Computers

PDAs

Smart Phones

Car Kit Adapters

Digital Cameras

Video Tape Recorders