[原创] AKM AK4432 32位立体声数字音频系统DAC解决方案

AKM公司的AK4432是用于数字音频系统的32位立体声数模转换器(DAC),集成了32位高音质低群时延的数字滤波器,THD+N为91dB,128倍过取样,主要用在汽车和家庭影院音频环绕声系统.本文介绍了AK4432主要特性,框图,以及评估板AKD4432-SA功能,框图,元件分布图和电路图.

The AK4432 is a 32-bit Stereo DAC which corresponds to digital audio systems. An internal circuitincludes newly developed 32-bit Digital Filter achieving short group delay and high quality sound. TheAK4432 has single end SCF outputs, increasing performance for systems with excessive clock jitter. TheAK4432 is ideal for a wide range of applications that demands high sound quality including Home Theaterand Car audio surround systems. It is housed in a 16-pin TSSOP package, saving more board space.

AK4432主要特性:

1. 2ch 32bit DAC
- 128 times Oversampling
- 32-bit High Quality Sound Low Group Delay Digital Filter
- Single Ended Output, Smoothing Filter
- THD+N: 91dB
- DR, S/N: 108dB
- Channel Isolation Digital Volume (12dB～-115dB, 0.5dB Step, Mute)
- Soft Mute
- De-emphasis Filter (32kHz, 44.1kHz, 48kHz)
- I/F Format: MSB justified, LSB justified, I2S, TDM
- Zero Detection
2. Sampling Frequency
- Normal Speed Mode: 8kHz to 48kHz
- Double Speed Mode: 64kHz to 96kHz..

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