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AD8256A

2x16W Stereo Digital Audio Amplifier with Headphone Driver

[Elite Semiconductor Memory Technology Inc. 

ESMT

AD8256A

2x16W Stereo Digital Audio Amplifier with Headphone Driver

Features

z 16/18/20/24-bit input with I2S, Left-alignment

and Right-alignment data format

z PSNR & DR(A-weighting)

Loudspeaker: 93dB (PSNR), 98dB (DR)

Headphone: 86dB (PSNR), 96dB (DR)

z Multiple sampling frequencies (Fs)

32kHz / 44.1kHz / 48kHz and

64kHz / 88.2kHz / 96kHz

z 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

z Supply voltage

3.0~12V for loudspeaker driver

3.0~3.3V for others

z Loudspeaker output power

2×10W(Full,8Ω) @ 1kHz and 10% THD+N

2×12.5W(Full,6Ω) @ 1kHz and 10% THD+N

2×16W(Full,4Ω) @ 1kHz and 10% THD+N

z Headphone power

34mW into 32Ω@1kHz and 1% THD+N

65mW into 16Ω@1kHz and 1% THD+N

110mW into 8Ω@1kHz and 1% THD+N

200mW into 4Ω@1kHz and 1% THD+N

z 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

z Anti-pop design

z Over-temperature protection

z Under-voltage shutdown

z Short-circuit protection

z I2C control interface

Applications

z CD and DVD

z TV audio

z Car audio

z Boom-box

z MP3 docking systems

z Portable / Handheld

z Powered speaker

z Wireless audio

z USB speaker

Description

This is a stereo fully digital audio amplifier with

output power which can deliver up to 2×16W to 4Ω

load with 12V supply voltage. Using I2C digital

control interface, AD8256A provides sound

processing functions including Volume, Bass, Treble,

EQ, Mixing and Dynamic Range Control (DRC).

ORDERING INFORMATION

Product Number

AD8256A-KG

AD8256A-LEG

Package

7x7 48L QFN

7x7 48L E-LQFP

Comments

Pb-free

Pb-free

Elite Semiconductor Memory Technology Inc.

Publication Date: May. 2007

Revision: 1.3 1/33

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