[原创] ADI ADAU1777音频编译码器(CODEC)数字处理方案

ADI公司的ADAU1777是四输入和两输出的音频编译码器(CODEC),采用数字处理引擎来实现滤波,电平控制,信号电平监视和混合,集成了24位ADC和DAC.模拟和数字输入/输出1.8V-3.3V,DSP核工作电压1.1V-1.8V,I2C和SPI控制接口,主要用在降噪手持设备和耳机,蓝牙降噪手持设备和耳机,个人导航设备和数字照相机和摄像机.本文介绍了ADAU1777主要特性,功能框图,以及评估板EVAL-ADAU1777Z主要特性,框图,电路图,材料清单和PCB设计图.

 The ADAU1777 is a codec with four inputs and two outputs that incorporates a digital processing engine to perform filtering, level control, signal level monitoring, and mixing. The path from the analog input to the DSP core to the analog output is optimized for low latency and is ideal for noise canceling headsets. With the addition of just a few passive components, a crystal, and an EEPROM for booting, the ADAU1777 provides a complete headset solution.

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

ADAU1777主要特性: 

Programmable audio processing engine
Fast (up to 768 kHz) and slow processing paths
Biquad filters, limiters, volume controls, and mixing
Low latency, 24-bit ADCs and DACs ..

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