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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.

图1. AK4621方框图

Notes:

- VSS1 and VSS2 must be connected to the same analog ground plane.

- When AOUT+/- drives some capacitive load, some resistance must be added in series between AOUT+/- and

capacitive load.

All digital input pins must not be left floating.

Typical Connection Diagram

图2. AK4621输入缓冲电路图(1)

图3. AK4621外接LPF电路图(1): (fc = 136kHz, Q=0.694)

图4. AK4621外接LPF电路图(2)