2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
Improved 3D Stereo Sound Enhancement Over Competition, 3-Input Mixer/MUX Eliminates Need for External Switch, Integrated DirectDrive Amplifiers Save Board Space and Cost
The MAX9775/MAX9776 combine a high-efficiency Class D, stereo/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 MAX9775/MAX9776 deliver 1.5W per channel into a 4Ω load from a 5V supply and offer efficiencies up to 79%. Active emissions limiting circuitry and spread-spectrum modulation greatly
reduce EMI, eliminating the need for output filtering found in traditional Class D devices.
The MAX9775/MAX9776 utilize a fully differential architecture, a full-bridged output, and comprehensive click-and-pop suppression. A 3D stereo enhancement function allows the MAX9775 to widen the stereo sound field immersing the listener in a cleaner, richer sound experience than typically found in portable applications. The devices utilize a flexible, user-defined mixer architecture
that includes an input mixer, volume control, and output mixer. All control is done through I²C.
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 MAX9775 is available in a 36-bump WLP (3mm x 3mm) package. The MAX9776 is available in a 32-pin TQFN (5mm x 5mm) or a 36-bump WLP (3mm x 3mm)
package. Both devices are specified over the extended -40°C to +85°C temperature range.
Key Features
Applications/Uses
Unique Spread-Spectrum Modulation and Active Emissions Limiting Significantly Reduces EMI
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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