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 clickand-
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.
Applications
Cell Phones
Portable Multimedia Players
Handheld Gaming Consoles