[原创] ADI ADAU1787具有两个DSP的CODEC音频解决方案

ADI公司的ADAU1787是集成了两个数字信号处理器(DSP)的具有四个输入和两个输出的编译码器(CODEC).ADAU1787具有可编程的FastDSP音频处理引擎,高达768kHz取样速率,双二阶滤波器,限制器,音量控制和混合; ADAU1787还集成了SigmaDSP音频处理核,高达50MIPS性能,低延迟24位ADC和DAC.主要特性还具有96dB信噪比(SNR)(信号通过PGA和ADC与A加权滤波器)以及105dB组合SNR(信号通过DAC和耳机与A加权滤波器),串口fSYNC频率从8kHz到192kHz,模拟进到模拟出的群时延为5 μs (fS = 768 kHz),4个单端模拟输入,可配置麦克风或线输入,8个数字麦克风输入,2个模拟差分音频输出可配置成线输出或耳机驱动器,锁相环(PLL)支持30kHz到27MHz任何输入时钟速率,主要用在降噪手持机和耳机,蓝牙ANC手持机和耳机,个人导航设备(PND),数码相机和摄像机,音乐乐器效果处理器,多媒体扬声器系统和智能手机.本文介绍了ADAU1787主要特性,框图和系统框图以及评估板EVAL-ADAU1787Z主要特性,电路图,材料清单和PCB设计图.

The ADAU1787 is a codec with four inputs and two outputs that incorporates two digital signal processors (DSPs). The path from the analog input to the DSP core to the analog output is optimized for low latency and is ideal for noise cancelling headsets. With the addition of just a few passive components, the ADAU1787 provides a complete headset solution.

Note that throughout this data sheet, multifunction pins, such as BCLK_0/MP1, are referred to either by the entire pin name or by a single function of the pin, for example, BCLK_0, when only that function is relevant.

ADAU1787主要特性:

Programmable FastDSP audio processing engine ..

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