EL4501CU ELANTEC [Elantec Semiconductor], EL4501CU Datasheet

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EL4501CU

Manufacturer Part Number
EL4501CU
Description
Video Front End
Manufacturer
ELANTEC [Elantec Semiconductor]
Datasheet
© 2000 Elantec Semiconductor, Inc.
Features
Applications
Ordering Information
• DC restore and sync separator
• Wideband (100MHz) DC restore
• Advanced sync separator
• Programmable data slicer
• Single 5 volt operation
• Differential Gain = 0.1%
• Differential Phase = 0.1°
• Low power (<75mW)
• Video Capture & Editing
• Video Projectors
• Set Top Boxes
• Security Video
• Embedded data recovery
EL4501CS
EL4501CU
Part No.
-40°C to +85°C
-40°C to +85°C
Temp. Range
24-Pin QSOP
24-Pin SOIC
Package
MDP0027
MDP0031
Outline #
EL4501C - Preliminary
Video Front End
General Description
The EL4501C Video Front End (VFE) is an integrated solution that
provides the key analog signal conditioning functions for analog video
signals. It forms the front end interface for either an analog or ana-
log/digital video system. The VFE contains a high bandwidth DC
Restore, a sophisticated Sync Separator, and a Data Slicer for embed-
ded data recovery.
The VFE will perform the restoration of the DC reference level
(blanking level) and the extraction of all of the necessary timing sig-
nals needed for synchronization and control. The sync separator is
designed for very good noise immunity by incorporating a signal qual-
ification scheme and internal brick wall filter. A data slicer is also
included to help decode data embedded in the active video or VBI
areas of the signal.
The VFE operates from a single 5 volt supply and is available in a
small 24 pin QSOP package that takes only 0.08in
area, as well as a standard 24 pin SOIC.
Connection Diagram
HORIZONTAL
COMPOSITE
DS_MODE
VIDEO_IN
DS_ENAB
SYNC_IN
RFREQ
GNDD
FSEL
GND
VFB
LOS
10
11
12
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
VIDEO_OUT
DS_OUT
DS_REF
REF_IN
REF_OUT
VS
VSD
SYNC_AMP
NC
BACK_PORCH
ODD/EVEN
VERTICAL
2
(54mm
2
)
of board

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EL4501CU Summary of contents

Page 1

... Part No. Temp. Range Package Outline # EL4501CS -40°C to +85°C 24-Pin SOIC MDP0027 EL4501CU -40°C to +85°C 24-Pin QSOP MDP0031 © 2000 Elantec Semiconductor, Inc. EL4501C - Preliminary Video Front End General Description The EL4501C Video Front End (VFE integrated solution that provides the key analog signal conditioning functions for analog video signals ...

Page 2

EL4501C - Preliminary Video Front End Absolute Maximum Ratings Values beyond absolute maximum ratings can cause the device to be pre- maturely damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Supply Voltage (V ...

Page 3

Electrical Characteristics V = +5V, GND = 0V 25°C, Input Video = Parameter Description I Input Bias Current (DS_REF) B Vos Input Offset Voltage V Hysteresis HYS t Propagation Delay PD t Rise/Fall Time R/F ...

Page 4

EL4501C - Preliminary Video Front End Typical Performance Curves 4 ...

Page 5

Timing Diagrams Fields One and Three (ODD) Composite Signal Composite Sync Output Burst/Back Porch Output Horizontal Sync Output Vertical Sync Output Odd/Even Output Fields Two and Four (EVEN) Composite Signal Composite Sync Output Burst/Back Porch Output Horizontal Sync Output Vertical ...

Page 6

EL4501C - Preliminary Video Front End Timing Diagrams (cont.) Video In Composite Sync Output Burst/Back Porch Output Horizontal Sync Output Video In Vertical Sync Output ODD/EVEN t<< ...

Page 7

Pin Description Pin Number Pin Name Pin Type 1 VFB Input Connection for gain and feedback resistors VIDEO_IN Input Input to DC restore amplifier. Input coupling capacitor connects from here to video source. 3 DS_MODE Input Sets the ...

Page 8

EL4501C - Preliminary Video Front End Block Diagram VIDEO_IN Input video 0.1uF SYNC_IN 0.1uF FSEL SYNC_AMP LOS R FREQ LOS’ Filter Sync Separator GND 8 DS_REF DS_MODE DS_ENAB + DS_OUT - VIDEO_OUT R VFB ...

Page 9

Description of Operation The EL4501C incorporates the following functional blocks: • DC restore amplifier • Advanced sync separator • Data Slicer Combined they provide the key analog processing func- tions for a number of video system applications. The operation of ...

Page 10

EL4501C - Preliminary Video Front End General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir- cuitry or specifications contained herein at ...

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