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.
* 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:
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MAX9775
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Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX9775EBX+TG45
Active
WLP;32 pin;0 mm²
Outline Drawing: (PDF)
Land Pattern: Not Available
Use pkgcode/variation: W363A3+3*
MAX9702 1.8W, Filterless, Stereo, Class D Audio Power Amplifier and DirectDrive Stereo Headphone Amplifier MAX9770 1.2W, Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers
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