EL4102CU Elantec Semiconductor, Inc. (acquired by Intersil), EL4102CU Datasheet

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EL4102CU

Manufacturer Part Number
EL4102CU
Description
Video Front End
Manufacturer
Elantec Semiconductor, Inc. (acquired by Intersil)
Datasheet
1.EL4102CU.pdf (11 pages)
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
MFDBK
DCREF
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
L
=150

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EL4102CU Summary of contents

Page 1

... Package Tape & Reel Outline # EL4102CU 24-Pin QSOP MDP0040 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. © ...

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 ...

Page 3

Electrical Characteristics 5V -5V Parameter Description I Output Short Circuit Current SC AC Performance SR Slew Rate - Video ...

Page 4

EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore Serial Programming Truth Table Inputs (X = Don’t Care) Standby Attenuation MSB ...

Page 5

Control Bits Logic Table Bit B7 Standby - Power Down B6 Gain Bit 4 B5 Gain Bit 3 B4 Gain Bit 2 B3 Gain Bit 1 B2 Gain Bit 0 B1 Input Select Bit 1 B0 Input Select Bit 0 ...

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 ...

Page 7

Typical Performance Curves Frequency Response vs Attenuation Video Output =150 L 0dB R =375 4 F 10.4dB 0 18dB -4 -8 -12 100k 1M 10M Frequency (Hz) Frequency Response vs Attenuation Video Output 8 A ...

Page 8

EL4102C - Preliminary 500MHz Video Front End: 4-1 MUX, VGA & DC-Restore Typical Performance Curves Frequency Response vs Attenuation Video Output =150 L R =750 4 F 0dB 0 -4 18dB -8 -12 100k 1M ...

Page 9

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

Page 10

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 ...

Page 11

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- ...

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