ADI ADAU1781低功耗24位立体声编译码器解决方案

ADI公司的ADAU1781是低功耗24位立体声编译码器,可编程的SigmaDSP音频处理核,低噪音DAC和ADC支持取样速率从8kHz到96kHz,扬声器能向8欧姆负载输出400mW,模拟和数字I/O电压1.8 V- 3.3 V,主要用在数码相机和数码摄像机.本文介绍了ADAU1781主要特性,方框图以及差分输入系统,模拟麦克风输入系统, 单端立体声线输入框图和立体声数字麦克风输入系统的框图,评估板EVAL-ADAU1781Z主要特性,框图,电路图,材料清单和PCB元件布局图.

The ADAU1781 is a low power, 24-bit stereo audio codec. The low noise DAC and ADC support sample rates from 8 kHz to 96 kHz. Low current draw and power saving modes make the ADAU1781 ideal for battery-powered audio applications.

A programmable SigmaDSP® core provides enhanced record and playback processing to improve overall audio quality.

The record path includes two digital stereo microphone inputs and an analog stereo input path. The analog inputs can be configured for either a pseudo differential or a single-ended stereo source. A dedicated analog beep input signal can be mixed into any output path. The ADAU1781 includes a stereo line output and speaker driver, which makes the device capable of supporting dynamic speakers.
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