Features and Benefits

  • 8V to 28V Supply Voltage Range
  • Spread-Spectrum Modulation Enables Low-EMI Solution
  • Passes EMI Limit with Up to 1m of Speaker Cable
  • High 80dB PSRR
  • Up to 88% Efficiency Eliminates Heatsink
  • Thermal and Output Current Protection
  • < 1µA Shutdown Mode
  • Click-and-Pop Suppression
  • < 10ms Turn-On Time
  • Space-Saving, 4mm x 4mm x 0.8mm, 24-Pin TQFN Package

Product Details

The MAX9737 mono 7W Class D amplifier provides a high-performance, thermally efficient amplifier solution that offers up to 88% efficiency at a 12V supply. The device operates from 8V to 28V and provides a high 80dB PSRR, eliminating the need for a regulated power supply.

Filterless modulation allows the MAX9737 to pass CE EMI limits with 1m cables using only a low-cost ferrite bead and small-value capacitor on each output.

Comprehensive click-and-pop suppression circuitry reduces noise on power-up/down or into and out of shutdown or mute.

An input op amp allows the user to create a lowpass or highpass filter, and select an optimal gain. The internal precharge circuit ensures clickless/popless turn-on within 10ms.

The MAX9737 is available in the 24-pin, TQFN-EP package and is specified over the -40°C to +85°C temperature range.


  • 2.1 Notebook PCs
  • LCD/PDP/CRT Monitors
  • MP3 Docking Stations
  • PC Surround Speakers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.