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发布者:微桥 发布时间:2011-12-29 阅读:5754次    关键字: 音频功放
AD6255A-USB Class-D Audio Power Amplifier


AD6255A-Class-D Audio Power Amplifier with USB/I2S Interface and Recording function DataSheet

Features
􀁺 Compliant with USB Specification v1.1, and USB
2.0 full speed
􀁺 Embedded high efficiency, high performance class
D stereo amplifier
􀁺 Support I2S input and I2S output interface of
master mode
Sampling frequencies(Fs):48kHz
􀁺 +6dB enhancement(Theater function)
􀁺 Support recording function
􀁺 Support both bus-powered and self-powered
operation
􀁺 Supports Win Me//2000/XP and MacOS
􀁺 True plug-and-play application, no driver is
required for basic USB speaker application
􀁺 Support volume/mute control with external button
􀁺 Built-in 5V to 3.3V regulator for internal device
operation
􀁺 Total efficiency
80% for 8Ω load @ -1dB 1kHz sine wave input
􀁺 Loudspeaker PSNR & DR (A-weighting)
80dB (PSNR), 78dB (DR) with Bead filter
82dB (PSNR), 78dB (DR) with Chock filter
􀁺 Anti-pop design
􀁺 Over-temperature protection
􀁺 Under-voltage shutdown
􀁺 Short-circuit detection
􀁺 12 MHz Crystal Input
􀁺 32-pin LQFP(Pb free)

Description
    AD6255A is a single chip of Class-D audio amplifier with USB/I2S interface and supports recording function. When using the power supplied from the USB port, AD6255A can drive a pair of up to 1W speakers due to the built-in, high efficiency
and high performance class D amplifiers. The device also has an I2S input port and I2S output port.The I2S input port allows other external audio sources to use the class D amplifier to share the speakers. The I2S output port allows other high performance audio device (i.e. AD8356A/AD8256A) to be controlled by AD6255A.

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