AKM AK4688立体声音频CODEC解决方案

AKM公司的AK4688是立体声音频CODEC,集成了具有24位输入/输出数据的ADC和DAC接口,支持异步操作.64x过取样,取样速率高达48kHz,线性相位数字抗混淆滤波器,S/(N+D)为83dB,动态范围105dB,S/N为99dB, 3.3V单电源输出达2Vrms,适合用于数字录音系统,DTV,蓝光记录仪和家庭影院.本文介绍了AK4688主要特性,方框图,典型应用电路以及评估板AKD4688-A主要功能,方框图,电路图和PCB元件布局图.

The AK4688 is a stereo audio CODEC. The integrated ADC and DAC interfaces accept up to 24-bit input/output data and support an asynchronous operation. The input range of the pre-amplifier, that supports line inputs, is adjustable by an external resistor. A ground referenced 2Vrms output with a 3.3V single power supply is achieved by an integrated charge pump, reducing external parts such as AC-coupling capacitors and mute circuits. The ADC block of the AK4688 achieves a dynamic range of 99dB, and the DAC block achieves a dynamic range of 105dB. The AK4688 is suitable for digital recording systems, digital TVs, Blu-ray recorders and Home theater systems.

AK4688主要特性:

􀂆 Asynchronous ADC/DAC Operation

􀂆 Capless Stereo Pre-amplifier for Line Input/Output

􀂆 24bit Stereo ADC

- 64x Oversampling

- Sampling Rate up to 48kHz

- Linear Phase Digital Anti-Alias Filter
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