AD6255A Datasheet, PDF (1/3 Pages) Elite Semiconductor Memory Technology Inc. – Class-D Audio Power Amplifier with USB / I2S Interface and Recording function

ESMT
AD6255A
Class-D Audio Power Amplifier with USB / I²S Interface and
Recording function
Features
z Compliant with USB Specification v1.1, and USB
2.0 full speed
z Embedded high efficiency, high performance class
D stereo amplifier
z Support I²S input and I²S output interface of
master mode
Sampling frequencies(Fs)：48kHz
z +6dB enhancement(Theater function)
z Support recording function
z Support both bus-powered and self-powered
operation
z Supports Win Me//2000/XP and MacOS
z True plug-and-play application, no driver is
required for basic USB speaker application
z Support volume/mute control with external button
z Built-in 5V to 3.3V regulator for internal device
operation
z Total efficiency
80% for 8Ω load @ -1dB 1kHz sine wave input
z Loudspeaker PSNR & DR (A-weighting)
80dB (PSNR), 78dB (DR) with Bead filter
82dB (PSNR), 78dB (DR) with Chock filter
z Anti-pop design
z Over-temperature protection
z Under-voltage shutdown
z Short-circuit detection
z 12 MHz Crystal Input
z 32-pin LQFP(Pb free)
Description
AD6255A is a single chip of Class-D audio
amplifier with USB/I²S interface and supports
recording function. When using the power supplied
from the USB port, AD6255A can drive a pair of up
to 1W speakers due to the built-in, high efficiency
and high performance class D amplifiers. The
device also has an I²S input port and I²S output port.
The I²S input port allows other external audio
sources to use the class D amplifier to share the
speakers. The I²S output port allows other high
performance audio device (i.e. AD8356A/AD8256A)
to be controlled by AD6255A.
Functional Block Diagram
Elite Semiconductor Memory Technology Inc.
Publication Date: Apr. 2007
Revision: 1.3
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