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