ADAV4601是一款用于高级电视应用的增强型音频处理器，全面支持数字和模拟基带音频。

    在默认情况下，音频处理器可提供从任一输入到任一输出的全矩阵切换的专用电视音频流；用于在插播广告或切换频道时补偿音量变化的自动音量控制；动态低音调节、多频带均衡器；以及用于音/视频同步的高达200 ms的立体声延迟存储器。

    同时，ADI公司提供获奖的图形化编程工具（SigmaStudio™），允许定制流的快速开发与评估。该工具可生成用户专用的音频流，包括使用ADI第三方算法库。

    模拟I/O集成了ADI公司特有的连续的、多比特∑-Δ架构，为高级电视系统带来更高级的性能，满足第三方算法供应商进行系统商标认证所需。模拟输入由95 dB动态范围(DNR)的ADC提供，模拟输出则由95 dB动态范围（DNR）的DAC提供。

    主扬声器输出作为数字调制PWM流提供给数字放大器。

    ADAV4601包括多通道数字输入与输出。此外，数字输入通道可以通过内置采样速率转换器(SRC)传输，内置SRC支持从5 kHz到50 kHz的任意采样速率。

应用

通用消费类音频后处理
家庭音频
DVD录像机
家庭影院（HTIB）系统与DVD接收机
用于DTV-ready电视的音频处理子系统
用于iDTV的模拟广播能力

特性

用于高级电视音响的完全可编程28-bit音频处理器，在复位时可以加载缺省音频流
实现ADI公司和第三方音频算法
用于音/视频同步的可调节数字延迟线，高达200 ms的立体声延迟
高性能24-bit ADC和DAC
DAC通道上的94 dB DNR性能
ADC通道上的95 dB DNR性能
具有集成放大器的耳机输出
高性能脉宽调制（PWM）数字输出
快速I2C控制
工作电源电压3.3 V（模拟）、1.8 V（数字核心）和3.3 V（数字接口）
采用80引脚LQFP封装
多通道数字基带I/O
4路立体声同步数字I2S输入通道
一个6通道采样速率转换器（SRC）和一个立体声SRC，支持5 kHz～50 kHz的输入采样速率
一路立体声同步数字I2S输出
S/PDIF输出，具有S/PDIF输入多路复用能力

ADAV4601: Audio Processor for Advanced TV

The ADAV4601 is an enhanced audio processor targeting advanced TV applications with full support for digital and analog baseband audio.

The audio processor, by default, loads a dedicated TV audio flow that incorporates full matrix switching (any input to any output), automatic volume control that compensates for volume changes during advertisements or when switching channels, dynamic bass, a multiband equalizer, and up to 200 ms of stereo delay memory for audio-video synchronization.

Alternatively, Analog Devices offers an award-winning graphical programming tool (SigmaStudio™) that allows custom flows to be quickly developed and evaluated. This allows the creation of customer-specific audio flows, including the use of ADI library of third-party algorithms.

The analog I/O integrates Analog Devices proprietary continuous-time, multibit Σ-Δ architecture to bring a higher level of performance to ATV systems, required by third-party algorithm providers to meet system branding certification. The analog input is provided by 95 dB dynamic range (DNR) ADCs, and analog output is provided by 94 dB DNR DACs.

The main speaker outputs can be supplied as a digitally modulated PWM stream to support digital amplifiers.

The ADAV4601 includes multichannel digital inputs and outputs. In addition, digital input channels can be routed through integrated sample rate converters (SRC), which are capable of supporting any arbitrary sample rate from 5 kHz to 50 kHz.

Applications

General-purpose consumer audio post processing
Home audio
DVD recorders
Home theater in a box systems and DVD receivers
Audio processing subsystems for DTV-ready TVs
Analog broadcast capability for iDTVs

Features
Fully programmable 28-bit audio processor for enhanced ATV sound—default audio processing flow loaded on reset
Implements Analog Devices, Inc. and third-party branded audio algorithms
Adjustable digital delay line for audio/video Synchronization for up to 200 ms stereo delay
High performance 24-bit ADC and DAC
94 dB DNR performance on DAC channels
95 dB DNR performance on ADC channels
Headphone output with integrated amplifiers
High performance pulse-width modulation (PWM) digital outputs
Multichannel digital baseband I/O - Please see data sheet.
Please see data sheet for additional features.
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