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发布者:微桥 发布时间:2011-12-1 阅读:4896次    关键字: 音频功放
AD8256A-2x16W Stereo Digital Audio Amplifier


AD8256A-2x16W Stereo Digital Audio Amplifier with Headphone DriverDataSheet

Features
􀁺 16/18/20/24-bit input with I2S, Left-alignment
and Right-alignment data format
􀁺 PSNR & DR(A-weighting)
Loudspeaker: 93dB (PSNR), 98dB (DR)
Headphone: 86dB (PSNR), 96dB (DR)
􀁺 Multiple sampling frequencies (Fs)
32kHz / 44.1kHz / 48kHz and
64kHz / 88.2kHz / 96kHz
􀁺 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
􀁺 Supply voltage
3.0~12V for loudspeaker driver
3.0~3.3V for others
􀁺 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
􀁺 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
􀁺 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
􀁺 I2C control interface

Applications
􀁺 CD and DVD
􀁺 TV audio
􀁺 Car audio
􀁺 Boom-box
􀁺 MP3 docking systems
􀁺 Portable / Handheld
􀁺 Powered speaker
􀁺 Wireless audio
􀁺 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).

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