© 2000 Elantec Semiconductor, Inc.

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

area, as well as a standard 24 pin SOIC.

Connection Diagram

VIDEO_OUT

VFB

VIDEO_IN

DS_MODE

DS_ENAB

GND

GNDD

RFREQ

FSEL

SYNC_IN

LOS

COMPOSITE

HORIZONTAL

DS_OUT

DS_REF

REF_IN

REF_OUT

VS

VSD

SYNC_AMP

NC

BACK_PORCH

ODD/EVEN

VERTICAL

1

2

3

4

16

15

14

13

5

6

7

12

11

9

8

10

20

19

18

17

24

23

22

21

Features

• 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)

Applications

• Video Capture & Editing

• Video Projectors

• Set Top Boxes

• Security Video

• Embedded data recovery

Ordering Information

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

EL4501C - Preliminary

Video Front End