Features and Benefits

  • 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

Product Details

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.

The MAX9812 is a single amplifier in a 6-pin SC70 package (2mm x 2.1mm) and the MAX9813 is a dual-input amplifier available in an 8-pin SOT23 (3mm x 3mm) package. The MAX9813 has two inputs allowing two microphones to be multiplexed to a single output.

The MAX9812/MAX9813 are offered in two grades. The MAX9812L/MAX9813L are optimized for 3.3V supply operation (2.7V to 3.6V). The MAX9812H/MAX9813H are PC2001 compliant and are optimized for 5V operation (4.5V to 5.5V). Both devices are specified over the -40°C to +85°C extended operating temperature range.


  • Car Kit Adapters
  • Digital Cameras
  • Notebook Computers
  • PDAs
  • Smartphones
  • Video Tape Recorders

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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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