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MAX9701
1.3W, Filterless, Stereo Class D Audio Power Amplifier


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 696kB)
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Description
The MAX9701 stereo Class D audio power amplifier provides Class AB amplifier audio performance with the benefits of Class D efficiency, eliminating the need for a heatsink while extending battery life. The MAX9701 delivers up to 1.3W per channel into an 8Ω load while offering 87% efficiency. Maxim's next-generation, low-EMI modulation scheme allows the amplifier to operate without an external LC filter while still meeting FCC EMI emission levels.

The MAX9701 offers two modulation schemes: a fixed-frequency (FFM) mode, and a spread-spectrum (SSM) mode that reduces EMI-radiated emissions. The MAX9701 oscillator can be synchronized to an external clock through the SYNC input, allowing synchronization of multiple Maxim Class D amplifiers. The sync output (SYNC_OUT) can be used for a master-slave application where more channels are required. The MAX9701 features a fully differential architecture, a full bridge-tied load (BTL) output, and comprehensive click-and-pop suppression. The device features internally set gains of 0dB, 6dB, 12dB, and 18dB selected through two gain-select inputs, further reducing external component count.

The MAX9701 features high 80dB PSRR, less than 0.1% THD+N, and SNR in excess of 88dB. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9701 is available in 24-pin thin QFN-EP (4mm x 4mm x 0.8mm), and 20-bump UCSP™ (2mm x 2.5mm x 0.6mm) packages. The MAX9701 is specified over the extended -40°C to +85°C temperature range.

An evaluation kit is available:  MAX9701EVKIT  

Key Features   Applications/Uses
  • Patented Spread-Spectrum Modulation Lowers Radiated Emissions
  • Single-Supply Operation (2.5V to 5.5V)
  • 1.3W Stereo Output (8Ω, VDD = 5V, THD+N = 1%)
  • No LC Output Filter Required
  • 87% Efficiency (RL = 8Ω, POUT = 1000mW)
  • Less Than 0.1% THD+N
  • High 80dB PSRR
  • Fully Differential Inputs
  • Integrated Click-and-Pop Suppression
  • Typical Low Quiescent Current (9mA)
  • Typical Low-Power Shutdown Mode (0.1µA)
  • Short-Circuit and Thermal-Overload Protection
  • Available in Thermally Efficient, Space-Saving Packages
    • 24-Pin Thin QFN-EP (4mm x 4mm x 0.8mm)
    • 20-Bump UCSP (2mm x 2.5mm x 0.6mm)

 
  • Automotive Multimedia
  • Cell Phones
  • Docking Stations
  • Handheld Gaming Consoles
  • MP3 Player
  • Multimedia Phones
  • PDA Phone
  • PMP Player
  • Smartphones

    Diagram
    MAX9701: Block Diagram
    Block Diagram

    Application Notes
  • Application Note 3924: Thermal Considerations for a UCSP Package - MAX9701
  • Application Note 3977: Class D Amplifiers: Fundamentals of Operation and Recent Developments - MAX9701

    Evaluation Kits
  • MAX9701EVKIT

    Reliability Reports
  • Show FIT data for:
  • Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-3 of 3

    MAX9701 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX9701ETG+  
    Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9701ETG+T    
    Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9701EBP+TG45    
    Active UCSP;20 pin;6 mm²
    Outline Drawing: 21-0095 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: B20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

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    Document Ref.: 19-3457; Rev 2; 2007-03-16
    This page last modified: 2009-08-11


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