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AKMAK4710低功耗SCART音頻驅(qū)動方案

2011-09-15
作者:KM公司
</a>STB" title="STB">STB" title="STB">STB和藍(lán)光播放器.本文介紹了AK4710主要特性,典型連接圖和評估板AKD4710功能,方框圖以及電路圖和元件布局圖.

The AK4710/11’audio block accepts either single-ended or differential input from an external audio DAC. It is very flexible, with integrated volume controls that range from -6dB to +24dB for gain control. The video block includes a clamp circuit, video filters, video switches and a 75-ohm video line driver, realizing simple and low cost system construction

The AK4710/11 supports fast and slow video blanking, compatible with the European SCART standard, making the AK4710/11 ideal for a full spectrum of European digital AV products. The AK4710 is housed in a 32-pin QFN package, and the AK4711 is housed in a 36-pin QFN package.

AK4710主要特性:

Audio section

?? THD+N: −92dB (@2Vrms)

?? Dynamic Range: 96dB (@2Vrms, A-weighted)

?? Full Differential or Single-ended input for Decoder DAC

?? Stereo Output for TV SCART and CINCH (2Vrms)

?? Ground-Referenced Output Eliminates

DC-Blocking Capacitor and Mute Circuit

Video section

?? Integrated LPF: –40dB@27MHz

?? 6dB Gain for Outputs

?? 5ch 75ohm driver

4ch for SCART: CVBS/Y, R/C, G, B

1ch for CINCH: CVBS

?? Y/Pb/Pr Option (to 6MHz)

Low-power Standby

SCART pin#16(Fast Blanking), pin#8(Slow Blanking) Output Control

Power supply

?? 3.3V+/−5% and 12V+/−5%

?? Low Power Dissipation / Low Power Standby Mode

Package

?? 32pin QFN (0.4mm pitch)

圖1.AK4710音頻部分框圖

圖2.AK4710視頻部分框圖

圖3.AK4710視頻消隱框圖

 圖4.AK4710典型連接圖

評估板AKD4710

AKD4710 is an evaluation board for quickly evaluating the AK4710, Single SCART Driver.Evaluation requires audio/video analog analyzers/generators and a power supply.

評估板AKD4710功能:

• RCA connectors for analog audio output

• XLR connectors for analog audio input

• RCA connectors for SD video input/output

• USB connector for serial control interface

圖5.評估板AKD4710方框圖

圖5.評估板AKD4710電路圖(1)

圖6.評估板AKD4710電路圖(2)



圖7.評估板AKD4710電路圖(3)

圖8.評估板AKD4710電路圖(4)


圖9.評估板AKD4710元件布局圖
詳情請見:
http://www.asahi-kasei.co.jp/akm/en/product/ak4710/ak4710_p03e.pdf

http://www.asahi-kasei.co.jp/akm/en/product/ak4710/akd4710-a0-02e.pdf
 



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