AD724JRZ

更新时间： 2024-11-06 12:53:55

品牌	Logo	应用领域
亚德诺 - ADI		商用集成电路光电二极管编码器
页数	文件大小	规格书
15页	198K
描述
RGB to NTSC/PAL Encoder

阅读下载

中文翻译

获取价格

数据手册
替代型号

如果您发现信息不准确，欢迎纠错

AD724JRZ 数据手册

RGB to NTSC/PAL Encoder

AD724

FEATURES

Low Cost, Integrated Solution

+5 V Operation

operates from a single +5 V supply. No external delay lines or

filters are required. The AD724 may be powered down when

not in use.

Accepts FSC Clock or Crystal, or 4FSC Clock

Composite Video and Separate Y/C (S-Video) Outputs

Luma and Chroma Outputs Are Time Aligned

Minimal External Components:

No External Filters or Delay Lines Required

Onboard DC Clamp

The AD724 accepts either FSC or 4FSC clock. When a clock is

not available, a low cost parallel-resonant crystal (3.58 MHz

(NTSC) or 4.43 MHz (PAL)) and the AD724’s on-chip oscilla-

tor generate the necessary subcarrier clock. The AD724 also

accepts the subcarrier clock from an external video source.

The interface to graphics controllers is simple: an on-chip logic

“XNOR” accepts the available vertical (VSYNC) and horizon-

tal sync (HSYNC) signals and creates the composite sync

(CSYNC) signal on-chip. If available, the AD724 will also

accept a standard CSYNC signal by connecting VSYNC to

Logic HI and applying CSYNC to the HSYNC pin. The

AD724 contains decoding logic to identify valid horizontal sync

pulses for correct burst insertion.

Accepts Either HSYNC and VSYNC or CSYNC

Phase Lock to External Subcarrier

Drives 75 ⍀ Reverse-Terminated Loads

Logic Selectable NTSC or PAL Encoding Modes

Compact 16-Lead SOIC

APPLICATIONS

RGB to NTSC or PAL Encoding

Delays in the U and V chroma filters are matched by an on-chip

sampled-data delay line in the Y signal path. To prevent alias-

ing, a prefilter at 5 MHz is included ahead of the delay line and

a post-filter at 5 MHz is added after the delay line to suppress

harmonics in the output. These low-pass filters are optimized

for minimum pulse overshoot. The overall luma delay, relative

to chroma, has been designed to be time aligned for direct input to

a television’s baseband. The AD724 comes in a space-saving

SOIC and is specified for the 0°C to +70°C commercial tem-

perature range.

PRODUCT DESCRIPTION

The AD724 is a low cost RGB to NTSC/PAL Encoder that

converts red, green and blue color component signals into their

corresponding luminance (baseband amplitude) and chromi-

nance (subcarrier amplitude and phase) signals in accordance

with either NTSC or PAL standards. These two outputs are also

combined to provide composite video output. All three outputs can

simultaneously drive 75 Ω, reverse-terminated cables. All logi-

cal inputs are TTL, 3 V and 5 V CMOS compatible. The chip

FUNCTIONAL BLOCK DIAGRAM

PHASE

DETECTOR

FSC

LOOP

FILTER

4FSC

VCO

CHARGE

PUMP

SUB-

CARRIER

XOSC

SYNC

4FSC

FSC

CSYNC

BURST

NTSC/PAL

HSYNC

SEPARATOR

NTSC/PAL

XNOR

VSYNC

CSYNC

±180°

(PAL ONLY)

SC 90°/270°

FSC 90

FSC 0

QUADRATURE

DECODER

4FSC

CLOCK

AT 8FSC

CSYNC

2-POLE

LP POST-

FILTER

3-POLE

LP PRE-

FILTER

SAMPLED-

DATA

DELAY LINE

CLAMP

LUMINANCE

OUTPUT

RED

GREEN

BLUE

COMPOSITE

OUTPUT

NTSC/PAL

RGB-TO-YUV

ENCODING

MATRIX

CLAMP

4-POLE

LPF

CLAMP

4-POLE

LPF

BALANCED

MODULATORS

CHROMINANCE

OUTPUT

CLAMP

4-POLE

LPF

CLAMP

BURST

REV. B

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...15

中文翻译

下载PDF

AD724JRZ 替代型号

型号	品牌	替代类型	描述	数据表
AD724JR-REEL7	ADI	完全替代	RGB to NTSC/PAL Encoder
AD724JR-REEL	ADI	完全替代	RGB to NTSC/PAL Encoder

与AD724JRZ相关器件

型号	品牌	获取价格	描述	数据表
AD724JRZ-R7	ROCHESTER	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16
AD724JRZ-REEL	ADI	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16
AD724JRZ-REEL7	ADI	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16
AD724JRZ-RL	ADI	获取价格	RGB to NTSC/PAL Encoder
AD725	ADI	获取价格	Low Cost RGB to NTSC/PAL Encoder with Luma Trap Port
AD725AR	ADI	获取价格	Low Cost RGB to NTSC/PAL Encoder with Luma Trap Port
AD725AR	ROCHESTER	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16
AD725AR-REEL	ADI	获取价格	Low Cost RGB to NTSC/PAL Encoder with Luma Trap Port
AD725AR-REEL7	ADI	获取价格	Low Cost RGB to NTSC/PAL Encoder with Luma Trap Port
AD725AR-REEL7	ROCHESTER	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16

与AD724JRZ相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

14
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

12
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

36
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

33

产品中心

服务支持

精选活动

关于我们

帮助中心

AD724JRZ

AD724JRZ 数据手册

AD724JRZ 替代型号

与AD724JRZ相关器件

与AD724JRZ相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AD724JRZ

AD724JRZ 数据手册

AD724JRZ 替代型号

与AD724JRZ相关器件

与AD724JRZ相关文章

您还可以找

您在本页遇到什么问题？