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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown

Product Details

Key Features

Parametric specs for Microphone Amplifiers
# Channels 2
VSUPPLY (V) (min) 2.4
VSUPPLY (V) (max) 5.5
IQ (mA) (typ) 0.75
THD+N (%) 0.05
en (nV/√Hz) 12
PSRR (dB) (min) 95
Input Type Differential with Aux
Package/Pins TQFN/16
TSSOP/14
Budgetary
Price (See Notes)
0.6
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Microphone Amplifiers
# Channels 2
VSUPPLY (V) (min) 2.4
VSUPPLY (V) (max) 5.5
IQ (mA) (typ) 0.75
THD+N (%) 0.05
en (nV/√Hz) 12
PSRR (dB) (min) 95
Input Type Differential with Aux
Package/Pins TQFN/16
TSSOP/14
Budgetary
Price (See Notes)
0.6

Key Features

  • 2.4V to 5.5V Single-Supply Operation
  • Differential Inputs and Outputs
  • Adjustable Gain
  • High 95dB PSRR
  • High 79dB CMRR
  • Low-Noise, Integrated Microphone Bias
  • 750µA Supply Current
  • 0.3µA Shutdown Current
  • ±4kV ESD Protection (AUX_IN)
  • THD+N: 0.05% at 1kHz
  • Available in Space-Saving Packages
    • 14-Pin TSSOP
    • 16-Pin TQFN (4mm x 4mm x 0.8mm)

Applications/Uses

  • Notebook Audio Systems
  • PDA Audio Systems
  • Signal Conditioning
  • Tablet PCs

Description

The MAX4063 is a differential-input microphone preamplifier optimized for high-performance, portable applications. The device features two selectable inputs, differential outputs, adjustable gain, an integrated low-noise bias source, and a low-power shutdown mode. Two input paths provide both differential and single-ended microphone sensing. The high-noise rejection of the differential input is ideally suited to an internal microphone where system noise and long-run PC board traces can degrade low-level signals. The single-ended input provides a simple connection to an external microphone.

The differential and single-ended inputs have independent, adjustable gains that are set with a single external resistor. Differential outputs provide a full-scale signal of up to 6VP-P from a single 3V supply, optimizing the dynamic range of the amplified signal. A complete shutdown mode reduces the supply current to only 0.3µA and disables the microphone bias for the ultimate in power savings.

The MAX4063 operates from 2.4V to 5.5V and is specified over the extended -40°C to +85°C operating temperature range. The MAX4063 is available in both 16-pin TQFN (4mm x 4mm x 0.8mm) and 14-pin TSSOP packages.

Simplified Block Diagram

MAX4063: Typical Operating Circuit MAX4063: 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.