AD725

更新时间： 2024-11-06 11:54:19

品牌	Logo	应用领域
亚德诺 - ADI		编码器
页数	文件大小	规格书
20页	350K
描述
Low Cost RGB to NTSC/PAL Encoder with Luma Trap Port

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中文翻译

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数据手册

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AD725 数据手册

Low Cost RGB to NTSC/PAL Encoder

with Luma Trap Port

AD725

FEATURES

P RO D UCT D ESCRIP TIO N

Com posite Video Output: Both NTSC and PAL

Chrom inance and Lum inance (S-Video) Outputs

Lum a Trap Port to Elim inate Cross Color Artifacts

TTL Logic Levels

Integrated Delay Line and Auto-Tuned Filters

Drives 75 ⍀ Reverse-Term inated Loads

Low Pow er +5 V Operation

T he AD725 is a very low cost general purpose RGB to NT SC/

PAL encoder that converts red, green and blue color compo-

nent signals into their corresponding luminance (baseband

amplitude) and chrominance (subcarrier amplitude and phase)

signals in accordance with either NT SC or PAL standards.

T hese two outputs are also combined on-chip to provide a

composite video output. All three outputs are available sepa-

rately at voltages of twice the standard signal levels as re-

quired for driving 75 Ω, reverse-terminated cables.

Pow er-Dow n to <1 ␮A

Very Low Cost

T he AD725 features a luminance trap (YT RAP) pin that pro-

vides a means of reducing cross color generated by subcarrier

frequency components found in the luminance signal. For por-

table or other power-sensitive applications, the device can be

powered down to less than 1 µA of current consumption. All

logic levels are T T L compatible thus supporting the logic re-

quirements of 3 V CMOS systems.

APPLICATIONS

RGB/ VGA to NTSC/ PAL Encoding

Personal Com puters/ Netw ork Com puters

Video Gam es

Video Conference Cam eras

Digital Still Cam eras

T he AD725 is packaged in a low cost 16-lead SOIC and oper-

ates from a +5 V supply.

FUNCTIO NAL BLO CK D IAGRAM

NTSC/PAL

CSYNC

BURST

HSYNC

VSYNC

SYNC

SEPARATOR

XNOR

4FSC

CSYNC

NTSC/PAL

4FSC CLOCK

FSC 90؇C/270؇C

FSC 90

180؇C

QUADRATURE

(PAL ONLY)

4FSC

FSC 0؇C

DECODER

CLOCK

AT 8FSC

CSYNC

2-POLE

LP POST-

FILTER

3-POLE

LP PRE-

FILTER

SAMPLED-

DATA

DELAY LINE

CLAMP

LUMINANCE

OUTPUT

RED

LUMINANCE

TRAP

COMPOSITE

OUTPUT

NTSC/PAL

⌺

RGB-TO-YUV

ENCODING

MATRIX

4-POLE

LPF

CLAMP

GREEN

BLUE

BALANCED

MODULATORS

4-POLE

LPF

CHROMINANCE

OUTPUT

CLAMP

4-POLE

LPF

CLAMP

BURST

REV. 0

Inform ation furnished by Analog Devices is believed to be accurate and

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

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

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/ 329-4700

Fax: 781/ 326-8703

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

12 3 4 5 6 7...20

中文翻译

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与AD725相关器件

型号	品牌	获取价格	描述	数据表
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
AD725ARZ	ADI	获取价格	Low Cost RGB to NTSC/PAL Encoder with Luma Trap Port
AD725ARZ	ROCHESTER	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16
AD725ARZ-R7	ROCHESTER	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16
AD725ARZ-REEL	ADI	获取价格	暂无描述
AD725ARZ-REEL7	ADI	获取价格	COLOR SIGNAL ENCODER, PDSO16, SOIC-16

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