Windows Vista-compliant, Stereo Class Ab Speaker Amplifiers And Directdrive Headphone Amplifiers Integrated ProductsThe MAX9789A MAX9790A combine a stereo, 2W Class
AB speaker power Amplifier with a stereo 100mW
DirectDrive Headphone Amplifier in a single device.
The MAX9789A MAX9790A are designed for use with the
Microsoft Windows Vista operating system and are fully
compliant with Microsofts Windows Vista specifications.
The Headphone Amplifier features Maxims patented
DirectDrive architecture that produces a ground-refer-
enced output from a single supply to eliminate the need
for large DC-blocking capacitors, as well as save cost,
board space, and component height. A high +90dB
PSRR and low 0.002% THD+N ensures clean, low-distor-
tion amplification of the Audio signal.
Separate speaker and Headphone Amplifier control
inputs provide independent shutdown of the speaker
and Headphone Amplifiers allowing speaker and head-
phone Amplifiers to be active simultaneously, if
required. The industry-leading click-and-pop suppres-
sion circuitry reduces audible transients during startup
and shutdown cycles.
The MAX9789A features an internal LDO that CAN be
used as a clean power supply for a CODEC or other cir-
cuits. The LDO output voltage is set internally at 4.75V or
CAN be adjusted between 1.21V and 4.75V using a sim-
ple resistive divider. The LDO is protected against ther-
mal overloads and short circuits while providing 120mA
of continuous output current and CAN be enabled inde-
pendently of the Audio Amplifiers By Maxim Integrated Products
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