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PDF GB4570 Data sheet ( Hoja de datos )
| Número de pieza | GB4570 | |
| Descripción | Monolithic Video Buffer/Clamp | |
| Fabricantes | Gennum | |
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GB4570 Monolithic
Video Buffer/Clamp
DATA SHEET
FEATURES
• accurate sync tip clamping (± 2 mV typical)
• less than 1 mV clamping distortion
• variable clamping voltage (VEE + 3 V to VCC -4.5 V)
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• ultra low differential gain and differential phase
• less than ± 0.15° phase delay variation at 3.58 MHz
• ± 0.1 dB flatness to 80 MHz
• ± 4.5 to ±13.2 V supply voltage range
DESCRIPTION
The GB4570 is a high performance video buffer/clamp used
primarily for sync tip clamping of video signals. Key features
include operation from ± 4.5 to ± 13.2 V supply voltages, ± 0.1
dB flatness to 80 MHz and availability of industry standard DIP
and SOIC packages.
In a typical video application, the GB4570 clamps the sync tip
to a known voltage. The clamping level can be set for normal
sync tip clamping by connecting pin 3 to - 0.286 volts. For
applications requiring non-standard sync tip clamping, the
clamping voltage applied to pin 3 may be varied.
The GB4570 features a tight delay spread of only ± 0.15° at
color burst frequencies and less than ± 1 millivolts clamping
distortion.
PIN CONNECTIONS
GB4570
GND
VIN
VCLAMP
CHOLD
1
2
3
4
8
7
6
5
VCC
VOUT
VEE
NC
AVAILABLE PACKAGING
APPLICATIONS
• Sync tip clamping of NTSC, PAL, SECAM and RGB
Video Signals
• Input buffering and clamping
• Inter-system video signal clamping
SIMPLIFIED CIRCUIT DIAGRAM
VCC
8
8 pin PDIP
8 pin SOIC
VIN 2
COUPLING
CAP
ORDERING INFORMATION
Part Number Package
GB4570-CDA 8 pin PDIP
Temperature Range
0° to 70°C
GB4570-CKA 8 pin SOIC
0° to 70°C
GB4570-CTA 8 pin SOIC Tape 0° to 70°C
-
50k +
4
CHOLD
7 VOUT
6 VEE
3 VCLAMP
Document No. 521 - 18 - 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
1 page  
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DOCUMENT
IDENTIFICATION
PRODUCT PROPOSAL
This data has been compiled for market investigation purposes
only, and does not constitute an offer for sale.
ADVANCE INFORMATION NOTE
This product is in development phase and specifications are
subject to change without notice. Gennum reserves the right to
remove the product at any time. Listing the product does not
constitute an offer for sale.
PRELIMINARY DATA SHEET
The product is in a preproduction phase and specifications are
subject to change without notice.
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
© Copyright September 1994 Gennum Corporation. All rights reserved. Printed in Canada.
5 521 - 18 - 01
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| PDF Descargar | [ Datasheet GB4570.PDF ] | |
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