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MAX9796
2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers

Industry's Smallest Audio Subsystem, Improved Class D Output Power with Integrated DirectDrive Headphone Amplifiers, 3D Sound Enhancement Sound, and 3-Input with Mixing/Mux


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 404kB)
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The MAX9796 combines a high-efficiency Class D, mono audio power amplifier with a mono DirectDrive™ receiver amplifier and a stereo DirectDrive headphone amplifier.

Maxim's 3rd-generation, ultra-low EMI, Class D audio power amplifiers provide Class AB performance with Class D efficiency. The MAX9796 delivers 2.3W into a 4Ω load from a 5V supply and offers efficiencies up to 80%. Active emissions limiting circuitry and spread-spectrum modulation greatly reduce EMI, eliminating the need for output filtering found in traditional Class D devices.

The MAX9796 features a fully differential architecture, a full-bridged output, and comprehensive click-and-pop suppression. The device utilizes a flexible, user-defined mixer architecture that includes an input mixer, volume control, and output mixer. All controls are done through an I²C interface.

The mono receiver amplifier and stereo headphone amplifier use Maxim's patented† DirectDrive architecture, that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and component height.

The MAX9796 is available in a 36-bump UCSP™ (3mm x 3mm) package and is specified over the extended -40°C to +85°C temperature range.

An evaluation kit is available:  MAX9796EVKIT  

Key Features   Applications/Uses
  • Unique Spread-Spectrum Modulation and Active Emissions Limiting Significantly Reduces EMI
  • Up to 3 Stereo Inputs
  • 2.3W Mono Speaker Output (4Ω, VDD = 5V)
  • 50mW Mono Receiver/Stereo Headphone Outputs (32Ω, VDD = 3.3V)
  • High PSRR (68dB at 217Hz)
  • 80% Efficiency (VDD = 3.3V, RL = 8Ω, POUT = 600mW)
  • I²C Control—Input Configuration, Volume Control, Output Mode
  • Click-and-Pop Suppression
  • Low Total Harmonic Distortion (0.03% at 1kHz)
  • Current-Limit and Thermal Protection
  • Available in Space-Saving, 36-Bump UCSP (3mm x 3mm)

 
  • Cell Phones
  • Handheld Gaming Consoles
  • Portable Multimedia Players

    Key Specifications:  Integrated Amplifiers
    Part Number Functions Class Spkr. Amp. VCC
    (V)
    Spkr. Amp. VCC
    (V)
    Spkr. Amp. ICC
    (mA)
    Spkr. Amp. POUT
    (W)
    Spkr. Amp. Half Pwr. THD+N
    (%)
    Hdph. Amp. VCC
    (V)
    Hdph. Amp. VCC
    (V)
    Hdph. Amp. ICC
    (mA)
    Hdph. Amp. POUT into 32Ω
    (mW)
    Hdph. Amp. Half Pwr. THD+N
    (%)
    Package/Pins Price
    min max typ min max typ @ 1% THD+N See Notes
    MAX9796  Mobile Communication Subsystem D 2.7 5.5 12 2.3 0.03 2.7 5.5 8 0.05 0.02
    WLP/32
    $1.05 @1k
    See All Integrated Amplifiers (11)

    U.S. Patent# 7,061,327

    Diagram
    MAX9796: Block Diagram
    Block Diagram

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    Document Ref.: 19-0866; Rev 1; 2008-01-18
    This page last modified: 2008-01-18


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