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2.3W Stereo Speaker Amplifiers and DirectDrive Headphone Amplifiers with Automatic Level Control

Audio Amplifier with Automatic Level Control for Speaker Protection and Better Sound Quality

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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Key Features

  • Automatic Level Control—Protects Speakers
  • Analog Volume Control
  • 120mW DirectDrive Headphone Amplifiers (16Ω)
  • 150mA Adjustable LDO
  • Class AB, 2.3W, Stereo BTL Speaker Amplifiers (3Ω)
  • High 95dB PSRR
  • Low-Power Shutdown Mode
  • Industry-Leading Click-and-Pop Suppression
  • Short-Circuit and Thermal Protection
  • Beep Input

Applications/Uses

  • Flat-Panel TVs
  • LCD Projectors
  • Notebook PCs
  • PC Displays
  • Portable Audio
  • Portable DVD Players
  • Tablet PCs

Description

The MAX9756/MAX9757/MAX9758 combine dual, 2.3W, bridge tied load (BTL) stereo audio power amplifiers and a DirectDrive® headphone amplifier in a single device. These devices feature single-supply voltage operation, shutdown mode, logic-selectable gain, a headphone sense input, a 31-step analog volume control, and industry-leading click-and-pop suppression. The headphone amplifier uses Maxim's DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors.

The MAX9756/MAX9757 feature automatic level control (ALC) that automatically limits output power to the speaker in the event of an overpowered output.

The MAX9756/MAX9758s' 150mA internal linear regulator provides a complete solution for DAC- or CODEC-based designs.

The MAX9756/MAX9757/MAX9758 are offered in space-saving, thermally efficient 32-pin (5mm x 5mm x 0.8mm) and 36-pin thin QFN (6mm x 6mm x 0.8mm) packages. All devices are specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX9756, MAX9757, MAX9758: Simplified Block Diagrams MAX9756, MAX9757, MAX9758: Simplified Block Diagrams 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.