ADI ADAU1401 SigmaDSP单片音频子系统解决方案

ADI公司的ADAU1401是集成了两个ADC和四个DAC以及微控制器类的控制接口的SigmaDSP 28/56位音频数字信号处理器(DSP),信号处理包括均衡,音频混合,低音增强,多带动态处理,延迟补偿,扬声器补偿以及立体声图像加宽等,可以弥补真实扬声器,放大器的不足,从而改善听觉环境,提高音频质量.主要用在多媒体扬声器系统,MP3播放器扬声器,汽车音响,微型立体声,数字电视,音乐乐器等.本文介绍了ADAU1401主要特性, 功能方框图, 系统框图, 自举模式, I2C与SPI控制和电路图,以及评估板EVAL-ADAU1401AEBZ主要特性,框图,电路图和PCB元件布局图.
The ADAU1401 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing includes equalization, cross over, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening. This processing can be used to compensate for real-world limitations of speakers, amplifiers, and listening environments, providing dramatic improvements in perceived audio quality.
Its signal processing is comparable to that found in high end studio equipment. Most processing is done in full 56-bit, double precision mode, resulting in very good low level signal performance. The ADAU1401 is a fully programmable DSP. The easy to use SigmaStudio™ software allows the user to graphically configure a custom signal processing flow using blocks such as biquad filters, dynamics processors, level controls, and GPIO interface controls.
ADAU1401 programs can be loaded on power-up either from a serial EEPROM through its own self-boot mechanism or from an external microcontroller. On power-down, the current state of the parameters can be written back to the EEPROM from the ADAU1401 to be recalled the next time the program is run.
Two Σ-Δ ADCs and four Σ-Δ DACs provide a 98.5 dB analog input to analog output dynamic. Each ADC has a THD + N of −83 dB, and each DAC has a THD + N of −90 dB. Digital input and output ports allow a glueless connection to additional ADCs and...