EL4102 Elantec Semiconductor, Inc. (acquired by Intersil), EL4102 Datasheet

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EL4102

Manufacturer Part Number
EL4102
Description
500mhz Video Front End: 4-1 MUX, VGA & Dc-restore
Manufacturer
Elantec Semiconductor, Inc. (acquired by Intersil)
Datasheet
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.
Features
Applications
Ordering Information
• 4:1 multiplexer with monitor out
• 18dB variable gain amplifier
• DC-restore amplifier
• Digital control serial interface
• ±5V operation
• 500MHz bandwidth
• HDTV/DTV Analog Inputs
• Video Projectors
• Computer Monitors
• Set Top Boxes
• Security Video
• Broadcast Video Equipment
EL4102CU
Part No.
24-Pin QSOP
Package
Tape & Reel
MDP0040
Outline #
EL4102C - Preliminary
500MHz Video Front End: 4-1 MUX, VGA & DC-Restore
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
SCLK
V
V
V
V
ENB
SDI
I/P0
I/P1
I/P2
I/P3
SAMPLE PULSE
+5V
-5V
0V
10
11
12
1
2
3
4
5
6
7
8
9
HOLD
GNDL2
IN0
VS1+
IN1
GNDI
IN2
VS-
IN3
ENB
SDI
SCLK
DCFDBK
DCREF
MFDBK
VFDBK
PDWN
MOUT
VOUT
GNDL
VS2+
SDO
CAP
VS-
24
23
22
21
20
19
18
17
16
15
14
13
DCV
+5V
-5V
PDWN
DATAOUT
R
R
FM
FV
C
0.33nF
H
R
R
GM
GV
Video Out
R
Monitor Out
R
L
L
=150Ω
=150Ω

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EL4102 Summary of contents

Page 1

... 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 -18dB of gain and blanking operations ...

Page 2

... EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore 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

... Crosstalk @10MHz [1] Crosstalk @100MHz Attenuator Range Attenuator Step Size Relative Attenuation Error 1. Total unwanted output normalized by wanted (or expected) output; add -10dB to get channel-to-channel isolation EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore = 750 O.C ...

Page 4

... EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore Serial Programming Truth Table Standby MSB ...

Page 5

... MSB Load MSB first, LSB last Serial Timing Parameters Parameter EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore Function B4-B2 B1 Example ≥100 ns Clock Period 0. Clock Rise/Fall Time ≥40ns ENB Hold Time ≥ ...

Page 6

... EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore Pin Descriptions Pin Number Pin Name Pin Type 1 HOLD Logic Input 2 GNDL2 Logic Ground 3 IN0 High Frequency Signal Power S1 5 IN1 High Frequency Signal 6 GNDI Analog Signal 7 IN2 High Frequency Signal ...

Page 7

... Block Diagram (Gain of 1) IN0 Input Video IN1 Input Video IN2 Input Video IN3 Input Video ENB SDI SCLK EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore FDBK - + GNDL GNDI GNDL2 750 M OUT V OUT 750 V FDBK ...

Page 8

... EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore Applications Information Using the Serial Data Output Connection for a Multi-chip Design In a system design that uses three chips, (i.e. RGB, YUV, YPrPb systems) the control signal may be "daisy chained" through the three chips. This gives an advan- tage in that the control will be updated simultaneously on the three channels ...

Page 9

... EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore 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 any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement ...

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