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AKM AK4621 24位立体声音频CODEC解决方案

关键词:消费类电子 CODEC DVD CDR 音乐设备

时间:2010-12-23 11:09:58       作者:AKM       来源:AK4621

AKM 公司的AK4621是高性能 24位立体声音频CODEC,支持192kHz录音和播放,器件具有两路24位ADC和24位DAC,全差分输入和可选择的数字滤波器, ADC的S/(N+D)为102dB,S/N为 115dB,DAC的S/(N+D)为100dB,S/N为115dB,非常适合用在Pro Audio声卡,数字音频工作站,DVD-R,硬盘,CD-R录音/播放系统和音乐设备录音.本文介绍了AK4621主要特性,方框图, 输入缓冲电路图, 输出外接LPF电路图以及AK4621评估板AKD4621-B方框图和电路图.

The AK4621 is a high performance 24-bit CODEC that supports up to 192kHz recording and playback. The on-board analog-to-digital converter has a high dynamic range due to AKM’s Enhanced Dual-Bit architecture. The DAC utilizes AKM’s Advanced Multi-Bit architecture that achieves low out-of-band noise and high jitter tolerance through the use of Switched Capacitor Filter (SCF) technology. The AK4621 is ideal for Pro Audio sound cards, Digital Audio Workstations, DVD-R, hard disk, CD-R recording/playback systems, and musical instrument recording.

AK4621主要特性:

□ 24-bit 2-channel ADC

- Full Differential Inputs

- Selectable Digital Filter

1. ADC Digital Filter 1 (GD=39/fs)

Passband: 0 ~ 21.8kHz (@fs=48kHz)

Stopband Attenuation: 100dB

2. ADC Digital Filter 2 (GD=14/fs)

Passband: 0 ~ 21.7kHz (@fs=48kHz)

Stopband Attenuation: 80dB

- S/(N+D): 102dB..

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