EL4501C - Preliminary
Video Front End
Features
General Description
• 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)
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.
Applications
• Video Capture & Editing
• Video Projectors
• Set Top Boxes
• Security Video
• Embedded data recovery
The VFE operates from a single 5 volt supply and is available in a
2
small 24 pin QSOP package that takes only 0.08in2(54mm ) of board
area, as well as a standard 24 pin SOIC.
Ordering Information
Part No.
EL4501CS
EL4501CU
Temp. Range
-40°C to +85°C
-40°C to +85°C
Package
Outline #
MDP0027
MDP0031
24-Pin SOIC
24-Pin QSOP
Connection Diagram
VFB
VIDEO_IN
DS_MODE
DS_ENAB
GND
1
2
3
4
5
6
7
8
9
24 VIDEO_OUT
23 DS_OUT
22 DS_REF
21 REF_IN
20 REF_OUT
19 VS
GNDD
RFREQ
18 VSD
FSEL
17 SYNC_AMP
16 NC
SYNC_IN
LOS 10
COMPOSITE 11
HORIZONTAL 12
15 BACK_PORCH
14 ODD/EVEN
13 VERTICAL
© 2000 Elantec Semiconductor, Inc.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
