GB4571-CDA

更新时间： 2024-11-09 07:01:07

品牌	Logo	应用领域
GENNUM		/
页数	文件大小	规格书
5页	152K
描述
Video Buffer with Precision Strobed DC Restore

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数据手册

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GB4571-CDA 数据手册

GB4571 Video Buffer with

Precision Strobed DC Restore

DATA SHEET

FEATURES

DESCRIPTION

The GB4571 is a high performance video buffer with DC

restore used primarily for accurate back porch clamping. Key

features include operation from ±4.5 V to ±13.2 V supply

voltages, fast recovery from sudden changes in DC offset,

±0.1dBflatnessto80MHzandavailabilityofindustrystandard

DIP and SOIC packages.

• accurate clamping to within ± 1 mV

• less than 1 mV clamping distortion

• variable clamping range (V_EE+ 3.0 V to V_CC- 4.5 V)

• ultra low differential gain and differential phase

• fast recovery from sudden changes in DC offsets

• less than ± 0.15° phase delay variation at 3.58 MHz

• ± 0.1 dB flatness to 80 MHz

In the typical back porch clamping application, a negative

going back porch pulse from an external sync separator (such

astheGS4881orGS4882)isappliedtotheGB4571'sSTROBE

input. While STROBE is low, the GB4571 determines the

correct DC level shift that should be applied to the input signal

by integrating over the entire back porch period. This reduces

sensitivity to noise and improves the accuracy of the DC

restoration compared to systems using sample and hold

techniques. Typical clamping accuracy of ±1 mV is achieved

by the GB4571.

• ± 4.5 V to ±13.2 V supply voltage range

PIN CONNECTIONS

GB4571

APPLICATIONS

V_CC

C_HOLD

V_IN

• Clamping of NTSC, PAL, SECAM & RGB Video Signals

• Multimedia Graphics Overlay

• Production Switchers

V_OUT

V_EE

V_CLAMP

STROBE

• Linear Keyers

GND

SIMPLIFIED CIRCUIT DIAGRAM

AVAILABLE PACKAGING

8 pin PDIP

8 pin SOIC

COUPLING

CAP

OUT

ORDERING INFORMATION

Part Number

Package

Temperature Range

NON-LNEAR

V TO I

CONVERTER

HIGH Z

BUFFER

GB4571-CDA

8 pin PDIP

0° to 70°C

CLAMP

GB4571-CKA

GB4571-CTA

8 pin SOIC

0° to 70°C

STROBE

8 pin SOIC Tape

GND

HOLD

Document No. 521 - 17 - 01

GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2055

Japan Branch: A-302, Miyamae Village, 2-10-42, Miyamae, Suginami-ku, Tokyo 168, Japan

tel. (03) 3247-8838 fax. (03) 3247-8839

12 3 4 5

中文翻译

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与GB4571-CDA相关器件

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GB4571-CKA	GENNUM	获取价格	Video Buffer with Precision Strobed DC Restore
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