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Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias

Industry's Smallest, Low-Noise, Low-Power Microphone Amplifiers with Integrated Bias

Product Details

Key Features

Parametric specs for Microphone Amplifiers
# Channels 2
VSUPPLY (V) (min) 4.5
VSUPPLY (V) (max) 5.5
IQ (mA) (typ) 0.23
THD+N (%) 0.015
en (nV/√Hz) 40
PSRR (dB) (min) 100
Input Type Single Ended
Package/Pins See Data Sheet
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Simplified Block Diagram

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Parameters

Parametric specs for Microphone Amplifiers
# Channels 2
VSUPPLY (V) (min) 4.5
VSUPPLY (V) (max) 5.5
IQ (mA) (typ) 0.23
THD+N (%) 0.015
en (nV/√Hz) 40
PSRR (dB) (min) 100
Input Type Single Ended
Package/Pins See Data Sheet

Key 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/Uses

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

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.

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.

Simplified Block Diagram

MAX9812, MAX9812H, MAX9812L, MAX9813, MAX9813H, MAX9813L: Typical Operating Circuit MAX9812, MAX9812H, MAX9812L, MAX9813, MAX9813H, MAX9813L: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.