描述 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.

特性 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 8? 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)