EL4102C Datasheet, PDF (1/9 Pages) Elantec Semiconductor – 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore

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
Applications
• 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
Outline #
MDP0040
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.
Connection Diagram
SAMPLE PULSE
1 HOLD
CAP 24
2 GNDL2
DCREF 23 DCV
VI/P0
3 IN0
DCFDBK 22
+5V 4 VS1+
VFDBK 21
VI/P1
5 IN1
VOUT 20
0V 6 GNDI
VS2+ 19 +5V
VI/P2
7 IN2
VS- 18 -5V
-5V 8 VS-
MOUT 17
VI/P3
9 IN3
MFDBK 16
CH
0.33nF
RGV
RFV
Video Out
RL=150Ω
Monitor Out
RL=150Ω
RFM
RGM
10 ENB
GNDL 15
ENB
SDI
11 SDI
PDWN 14
PDWN
SCLK
12 SCLK
SDO 13
DATAOUT
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.