EL4102C - Preliminary
EL4102C - Preliminary
500MHz Video Front End: 4-1 MUX, VGA & DC-Restore
Features
•
•
•
•
•
•
4:1 multiplexer with monitor out
18dB variable gain amplifier
DC-restore amplifier
Digital control serial interface
±5V operation
500MHz bandwidth
General Description
The EL4102C VFE (Video Front End) is designed to perform all of the
input processing functions in an analog video system as well as provide
analog input processing for digital video systems. The EL4102C VFE
contains a 4:1 MUX input, a DC-restore amplifier and a variable gain
amplifier. The MUX input can be used to select which input to use. In a
digital system, the DC-restore and variable gain amplifiers allow the
input signal to be positioned and scaled to give optimum A-to-D con-
versions results. In an analog system these perform the brightness and
contrast operations. A buffered output of the MUX selection is also
available for use as a monitor output.
With a 500MHz bandwidth and only 50mA supply current, the
EL4102C is ideal for use in portable and fixed projectors, as well as
HDTV, DTV and other high performance video applications.
A 3-wire digital interface enables full control of the input selection, as
well as 0 to -18dB of gain and blanking operations.
The EL4102C is available in the QSOP24 package and is specified for
operation over the -40°C to +85°C temperature range.
Outline #
MDP0040
Applications
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•
•
•
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HDTV/DTV Analog Inputs
Video Projectors
Computer Monitors
Set Top Boxes
Security Video
Broadcast Video Equipment
Ordering Information
Part No.
EL4102CU
Package
24-Pin QSOP
Tape & Reel
Connection Diagram
SAMPLE PULSE
1 HOLD
2 GNDL2
V
I/P0
3 IN0
+5V
V
I/P1
5 IN1
0V
V
I/P2
7 IN2
-5V
V
I/P3
9 IN3
10 ENB
ENB
SDI
SCLK
11 SDI
12 SCLK
MFDBK 16
GNDL 15
PDWN 14
SDO 13
PDWN
DATAOUT
8 VS-
VS- 18
MOUT 17
R
GM
-5V
R
FM
Monitor Out
R
L
=150Ω
6 GNDI
VOUT 20
VS2+ 19
+5V
Video Out
R
L
=150Ω
4 VS1+
DCFDBK 22
R
GV
VFDBK 21
R
FV
CAP 24
DCREF 23
DCV
C
H
0.33nF
August 30, 2001
Note:
All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
© 2001 Elantec Semiconductor, Inc.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
