ADI ADV7282A差分输入四路过取样SDTV视频译码解决方案

ADI公司的ADV7282A是10位四路过取样SDTV视频译码器，差分输入，支持NTSC/PAL/SECAM彩色解调，视频输入每路支持CVBS， Y/C和YPrPb模式，模拟视频输入通路配有抗混淆滤波器，NTSC/PAL/SECAM 自动检测，2线I2C兼容串行接口，具有汽车应用的资格和降功耗模式，工作温度−40℃ 到 +105℃ ，主要用在高档驾驶辅助，汽车娱乐系统，媒体播放器和视频安全DVR.本文介绍了ADV7282A主要特性，功能框图，应用电路以及评估板EVAL-ADV7282AEBZ主要特性，连接图和电路图。

The ADV7282A1 has the same pinout as and is softwarecompatible with the ADV7282. The mobile industry processorinterface （MIPIR） model of the ADV7282A （ADV7282A-M）has the same pinout as and is software compatible with theADV7282-M.

All features， functionality， and specifications are shared by theADV7282A and the ADV7282A-M， unless otherwise noted.The ADV7282A is a versatile one-chip， multiformat videodecoder that automatically detects standard analogbasebandvideo signals and converts them into YCrCb 4:2：2 componentvideo data streams.

The analog input of the ADV7282A features an input mux（4-channel on ADV7282A， 6-channel on ADV7282A-M）， asingle 10-bit analog-to-digital converter （ADC） and an on-chipdifferential to single-ended converter to accommodate thedirect connection of differential， pseudo differential， or singleendedCVBS without the need for external amplifier circuitry.

The standard definition processor（SDP）in the ADV7282Aautomatically detects PAL， NTSC and SECAM standards in theform of composite， S-Video（Y/C）and component. The analogvideo is converted into a 4:2：2 component video data streamthat is output either via an 8-bit ITU-R BT.656standardcompatibleinterface（ADV7282A）or via a MIPI CSI-2 Tx（hereafter referred to as MIPI Tx） interface （ADV7282A-M）。

The ADV7282A also feature a deinterlacer for interlaced toprogressive （I2P） conversion.The ADV7282A offers short to battery （STB） diagnostic senseinputs and general-purpose outputs.

The ADV7282A is provided in a space-saving LFCSP surfacemount，RoHS compliant package. The ADV7282A is rated overthe −40℃ to +105℃ temperature range， making it ideal forautomotive applications.

ADV7282A主要特性：

Worldwide NTSC/PAL/SECAM color demodulation support

One 10-bit ADC， 4× oversampling per channel for CVBS， Y/C，and YPrPb modes

Analog video input channels with on-chip antialiasing filter

ADV7282A： up to 4 input channels

ADV7282A-M： up to 6 input channels

Video input support for CVBS （composite）， S-Video （Y/C），and YPrPb （component）

Fully differential， pseudo differential， and single-ended

CVBS video input support

NTSC/PAL/SECAM autodetection

STB diagnostics on 2 video inputs

Up to 4 V common-mode input range solution

Excellent common-mode noise rejection capabilities

5-line adaptive 2D comb filter and CTI video enhancement

Integrated AGC with adaptive peak white mode

Fast switching capability

Integrated I2P video output converter （deinterlacer）ACE

Downdither （8-bit to 6-bit）

Rovi copy protection detection

8-bit ITU-R BT.656 YCrCb 4:2：2 output and HS，VS，or fieldsynchronization （ADV7282A）

MIPI CSI-2 output interface （ADV7282A-M only）

Full featured VBI data slicer with WST support

Power-down mode available

2-wire， I2C-compatible serial interface

Qualified for automotive applications

−40℃ to +105℃ temperature grade

32-lead， 5 mm × 5 mm， RoHS compliant LFCSP

ADV7282A应用：

Advanced driver assistance

Automotive infotainment

DVRs for video security

Media players

图1.ADV7282A功能框图

图2.ADV7282A-M功能框图

图3.ADV7282A典型连接图

图4. ADV7282A-M典型连接图

评估板EVAL-ADV7282AEBZ

The EVAL-ADV7282AEBZ evaluation kit is the platform provided by Analog Devices， Inc.， to evaluate the ADV7282A video decoder. The EVAL-ADV7282AEBZ evaluation kit contains an EVAL-ADV7282AEBZ evaluation board and all of its necessary peripherals.

This user guide provides a detailed overview of the EVAL-ADV7282AEBZ evaluation board hardware and the software required to use it.The ADV7282A data sheet and the ADV7280A/ADV7281A/ ADV7282A Device Manual should be consulted in conjunction with this user guide when using the EVAL-ADV7282AEBZ evaluation board.EngineerZone can be accessed to find additional information about the ADV7282A.

评估板EVAL-ADV7282AEBZ主要特性：

Four video input ports capable of accepting any of the following formats： single-ended CVBS， S-video （Y/C）， and component （YPbPr）

Digital （ITU-R BT.656） and YPbPr outputs

评估板EVAL-ADV7282AEBZ包括：

EVAL-ADV7282AEBZ evaluation board

7.5 V power supply block

USB cable

图5.评估板EVAL-ADV7282AEBZ外形图

图6.评估板EVAL-ADV7282AEBZ连接图

图7.评估板EVAL-ADV7282AEBZ电路图（1）

图8.评估板EVAL-ADV7282AEBZ电路图（2）

图9.评估板EVAL-ADV7282AEBZ电路图（3）