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发布者:微桥 发布时间:2011-12-9 阅读:4265次    关键字: 音频功放
AD82571B-12W Stereo/Mono Digital Audio Amplifier


AD82571B-12W Stereo/Mono Digital Audio Amplifier DataSheet

Features
􀁺 16/18/20/24-bit input with I2S, Left-alignment
and Right-alignment data format
􀁺 PSNR & DR(A-weighting)
Loudspeaker: 100dB (PSNR), 108dB (DR) @18V
􀁺 Multiple sampling frequencies (Fs)
32kHz / 44.1kHz / 48kHz and
64kHz / 88.2kHz / 96kHz and
128kHz/176.4kHz/192kHz
􀁺 System clock = 64x, 128x, 256x, 384x, 512x, 768x,
1024x Fs
256x~1024x Fs for 32kHz / 44.1kHz / 48kHz
128x~512x Fs for 64kHz / 88.2kHz / 96kHz
64x~256x Fs for 128kHz/176.4kHz/192kHz
􀁺 Supply voltage
3.3V for digital circuit
12V~18V for loudspeaker driver
􀁺 Loudspeaker output power for 18V
2×10W into 8Ω@0.32% THD+N for stereo
1×20W into 4Ω@0.22% THD+N for mono
􀁺 Loudspeaker output power for 18V with proper
cooling method
2×14W into 8Ω@1% THD+N for stereo
1×29W into 4Ω@1% THD+N for mono
􀁺 Anti-pop design
􀁺 Over-temperature protection
􀁺 Internal PLL
􀁺 Under-voltage shutdown
􀁺 Over-current protection
􀁺 I2C control interface

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 2x12W for stereo or 1x24W for mono at 18V supply voltage, no external heat-sink or fan is requirement. Using I2C digital control interface, AD82571B provides input format selection, mute and volume control function. Protection circuits are provided to protect AD82571B damage while connection error.

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