AD723

更新时间： 2024-01-24 22:43:47

品牌	Logo	应用领域
亚德诺 - ADI		开关编码器
页数	文件大小	规格书
20页	680K
描述
2.7 V to 5.5 V RGB-to-NTSC/PAL Encoder with Load Detect and Input Termination Switch

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技术参数
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AD723 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SSOP
包装说明：	TSSOP, TSSOP28,.25	针数：	28
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	0.89
Is Samacsys：	N	商用集成电路类型：	COLOR SIGNAL ENCODER
输入类型：	RGB	JESD-30 代码：	R-PDSO-G28
JESD-609代码：	e3	长度：	9.7 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	28	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装等效代码：	TSSOP28,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	电源：	3/5 V
认证状态：	Not Qualified	座面最大高度：	1.2 mm
子类别：	Color Signal Converters	最大压摆率：	49 mA
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	2.7 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
视频标准：	PAL; NTSC	宽度：	4.4 mm
Base Number Matches：	1

AD723 数据手册

a^{2.7 V to 5.5 V RGB-to-NTSC/PAL Encoder with}

Load Detect and Input Termination Switch

AD723

FEATURES

or combined for composite video (CV). All outputs are avail-

able separately and optimized for driving 75 Ω loads. Active

termination is used for lower power consumption.

Low Cost, Fully Integrated Solution for NTSC/PAL

Composite and Y/C (S-Video) Outputs

Current Output Drives 75 ⍀ Loads

A smart load detect feature powers down unused outputs and

can be used to monitor the continuing presence or absence of

an external TV. This enables plug-and-play operation. In addition,

a logic controlled triple switch at the input solves the applica-

tions problem of differing load conditions when an RGB monitor

is disconnected. When an RGB monitor is not present, the R,

G, and B terminations are enabled by the user. This solution

ensures no loss of video bandwidth when the RGB monitor is

in operation.

DC-Coupled: Supports TV Load Detect

No Large AC-Coupling Capacitors at Output

Self-Power-Down of Unloaded Output Drivers

Triple Switch to Enable RGB Termination

Integrated Delay Line and Auto-Tuned Filters

Y-Trap to Eliminate Cross Color Artifacts

3 V Supply Operation: Low Power

< 100 mW: Composite Active (Typical)

< 150 mW: S-Video Active (Typical)

<1 ␮A: Power-Down Current

In PC applications, flicker filter support is provided by the

graphics controller, which has direct access to memory. Under-

scan compensation, necessary for uses other than video or

DVD, is supported through choice of RGB output clocks and

sync intervals.

APPLICATIONS

TV Out for Personal Computers/Laptops

Digital Cameras

Set-Top Boxes

Video Games

Internet Appliances

An optional luminance trap (YTRAP) provides a means of

reducing cross color artifacts due to subcarrier frequency infor-

mation in the Y signal.

PRODUCT DESCRIPTION

The AD723 is a low cost RGB-to-NTSC/PAL encoder that

converts analog red, green, and blue color component signals

into their corresponding luminance and chrominance signals for

display on an NTSC or PAL television. Luminance (Y) and

Chrominance (C) signals are available individually for S-video,

The AD723 is available in a 28-lead TSSOP package and is

capable of operation from supplies of 2.7 V to 5.5 V.

FUNCTIONAL BLOCK DIAGRAM

CURRENT OUTPUT DRIVERS

WITH SMART LOAD DETECT

8FSC CLK

TRIPLE INPUT

TERMINATION

LUMINANCE

RIN

4-POLE

LPF

LUMA

DELAY LINE

4-POLE

LPF

CLAMP

LUMA

TRAP

Y TRAP

COMPOSITE

GND

CSYNC

RGB-TO-YUV

ENCODING

MATRIX

GIN

CLAMP

4-POLE

LPF

CHROMINANCE

BALANCED

MODULATORS

GND

4-POLE

LPF

BURST

BIN

CLAMP

4-POLE

LPF

YSET

CSET

GND

SIN

COS

BURST

GAIN SET

RESISTORS

TERM

AD723

CVSET

QUADRATURE

DECODER

FSC

4FSC

HSYNC

VSYNC

BURST

CSYNC

SYNC

SEPARATOR

TV DETECT

STND

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...20

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