AKM AK4687家庭影院立体声CODEC解决方案

AKM公司的AK4687是具有两路输入选择器和线路驱动器的异步立体声CODEC,ADC/DAC接口能接纳高达24位输入数据,并支持异步操作.24位立体声ADC采用64x过取样,取样频率高达48kHz,线性相位数字抗混淆滤波器,S/(N+D)为83dB,动态范围99dB,而24位立体声DAC采用128x过取样,取样频率高达192kHz,24位8倍数字滤波器,S/(N+D)为95dB,动态范围105dB.主要用在蓝光影碟机, 家庭影院,DTV,数字录音系统.本文介绍了AK4687主要特性, 方框图,典型应用电路图,以及评估板AKD4687-A功能,方框图和电路图与元件布局图.

The AK4687 is a stereo audio CODEC with 2-channel input selector and a line driver. The interfaces of ADC/DAC can accept up to 24bit input data and support asynchronous operation. The input range of the pre-amplifier, that supports 3ch stereo inputs, is selectable by external resistors. Both the input stereo selector and output drivers support ground reference 2Vrms In/Output, making it possible to remove AC-coupling capacitors and reducing external parts. The AK4687 has a dynamic range of 99dB for ADC, 105dB for DAC. It is well suitable for digital recording systems, digital TVs, Blu-ray recorders and Home theater systems.

AK4687主要特性:

􀂆 Asynchronous ADC/DAC Operation

􀂆 3:1 Capless Stereo Line Input Selector

􀂆 24bit Stereo ADC

- 64x Oversampling

- Sampling Rate up to 48kHz
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