ESMT
Preliminary
AD82571A
10W Stereo/Mono Digital Audio Amplifier with Headphone
Driver and SubWoofer PWM out
Features
16/18/20/24-bit input with I
2
S, Left-alignment
and Right-alignment data format
PSNR & DR(A-weighting)
Loudspeaker: 91dB (PSNR), 86dB (DR) @18V
Headphone: 86dB (PSNR), 86dB (DR)
Multiple sampling frequencies (Fs)
32kHz / 44.1kHz / 48kHz and
64kHz / 88.2kHz / 96kHz and
128kHz/176.4kHz/192kHz
System clock = 64x, 128x, 192x, 256x, 384x,
512x, 576x, 768x, 1024x Fs
64x~1024x Fs for 32kHz / 44.1kHz / 48kHz
64x~512x Fs for 64kHz / 88.2kHz / 96kHz
64x~256x Fs for 128kHz/176.4kHz/192kHz
Supply voltage
12V~18V for loudspeaker driver
3.0~3.3V for others
Loudspeaker output power for 18V
2×10W into 8Ω@0.2% THD+N for stereo
1×20W into 4Ω@0.3% THD+N for mono
Headphone power
40mW into 32Ω@1kHz and 1% THD+N
80mW into 16Ω@1kHz and 1% THD+N
Sound processing including：
Bass (+18dB~-12dB, 3dB frequency is 250Hz),
Treble (+18dB~-12dB, 3dB frequency is 7kHz),
5 bands parametric EQ,
Volume control (+24dB~-103dB, 1dB/step) and
Dynamic range control
Anti-pop design
Over-temperature protection
Under-voltage shutdown
Short-circuit protection
I
2
C control interface
Subwoofer PWM output
Applications
CD and DVD
TV audio
Car audio
Boom-box
MP3 docking systems
Powered speaker
Wireless audio
USB speaker
Description
This is a stereo (8Ω)/mono (4Ω) fully digital audio
amplifier with output power which can drive up to
2x10W for stereo or 1x20W for mono at 18V supply
voltage, no external heat-sink or fan is requirement.
Using I
2
C digital control interface, AD82571A provides
sound processing includes Volume, Bass, Treble, EQ,
Mixing and Dynamic Range Control (DRC). Protection
circuits are provided to protect AD82571A damage
while connection error. It is possible to compose of 2.1
channels with two pieces of AD82571A and 5.1
channels with four pieces.
ORDERING INFORMATION
Product Number
AD82571A-LEG
Package
7x7 48L E-LQFP
Comments
Pb-free
Elite Semiconductor Memory Technology Inc.
Publication Date: Oct. 2007
Revision: 0.1
1/35
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
