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发布者:微桥 发布时间:2011-12-16 阅读:7559次    关键字: 音频功放
AD83582-10Wx2+20W 2.1CH数字音频功放


AD83582-10Wx2+20W 2.1CH Digital Audio Amplifier with EQ Functions and Sub-Woofer PWM out DataSheet

Features
􀁺 16/18/20/24-bits input with I2S, Left-alignment
and Right-alignment data format
􀁺 PSNR & DR(A-weighting)
Loudspeaker: 98dB (PSNR), 108dB (DR) @24V
􀁺 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
3.3V for digital circuit
12V~24V for loudspeaker driver
􀁺 Loudspeaker output power for 24V
10W x 2CH into 8Ω @0.2% THD+N for stereo
15W x 2CH into 8Ω @0.25% THD+N for stereo
20W x 1CH into 4Ω @0.25% THD+N for mono
30W x 1CH into 4Ω @0.3% THD+N for mono
􀁺 Sound processing including:
8 bands parametric EQ
Volume control (+24dB~-103dB, 0.5dB/step),
Dynamic range control
3D surround sound
Channel mixing
Automatic Zero-detection mute
Bass/Treble tone control
Bass management crossover filter
DC-blocking high-pass filter
􀁺 Anti-pop design
􀁺 Over-temperature protection
􀁺 I2C control interface with selectable device
address
􀁺 Support hardware and software reset
􀁺 Internal PLL
􀁺 Subwoofer PWM output
􀁺 Under-voltage shutdown
􀁺 Short-circuit protection

Applications
􀁺 CD and DVD
􀁺 TV audio
􀁺 Car audio
􀁺 Boom-box
􀁺 MP3 docking systems
􀁺 Powered speaker
􀁺 Wireless audio

Description
    AD83582 is a digital audio amplifier capable of driving a pair of 8Ω, 10W and 4Ω SE, 10W or a single 4Ω, 20W speaker operating at 24V supply without external heat-sink or fan requirement. It’s also capable of driving a pair of 8Ω, 15W or a single 4Ω, 30W speaker operating at a 24V supply with proper cooling method.
    AD83582 can provide advanced audio processing capabilities, such as volume control, 8 EQ bands,audio mixing, 3D surround and Dynamic Range Contro (DRC).These functions are fully programmable via a simple I2C control interface. Robust protection circuits are provided to protect AD83582 from damage due to accidental erroneous operating condition.
    AD83582 is more tolerant to noise and PVT (Process, Voltage, and Temperature) variation than the analog class-AB or class-D audio amplifier counterpart
implemented by analog circuit design. AD83582 is pop free during instantaneous power switch because of its built-in, robust anti-pop circuit. The output stage is flexibly configurable for stereo or mono applications. In addition, AD83582 provides a sub-woofer PWM output port for the increasingly popular 2.1 channel applications. The programmable audio bass content of this subwoofer PWM output port can drive an external, low cost digital amplifier power
tage (such as ESMT’s AD9256H, AD92580, ..). Furthermore, it is possible to use three pieces of AD83582 to realize 5.1 channels for home theater applications.

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