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.
EL
4102C -
Preliminary
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 -40C to +85C temperature range.
Connection Diagram
1
2
3
4
16
15
14
13
5
6
7
12
11
9
8
10
20
19
18
17
24
23
22
21
HOLD
GNDL2
IN0
VS1+
IN1
GNDI
IN2
VS-
IN3
ENB
SDI
SCLK
CAP
DCREF
DCFDBK
VFDBK
VOUT
VS2+
VS-
MOUT
MFDBK
GNDL
PDWN
SDO
SAMPLE PULSE
V
I/P0
+5V
V
I/P1
V
I/P2
-5V
V
I/P3
SDI
SCLK
Video Out
R
L
=150
Monitor Out
R
L
=150
PDWN
0.33nF
DCV
R
GV
R
FV
+5V
-5V
R
FM
R
GM
DATAOUT
C
H
ENB
0V
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.
Package
Tape & Reel
Outline #
EL4102CU
24-Pin QSOP
MDP0040
EL4102C - Preliminary
500MHz Video Front End: 4-1 MUX, VGA & DC-Restore
Augu
st 30, 2001
2
EL4102C - Preliminary
500MHz Video Front End: 4-1 MUX, VGA & DC-Restore
EL
4102C
-
Pre
l
iminary
Absolute Maximum Ratings
(T
A
= 25C)
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
S+
to V
S
-)
11V
Input Voltage
V
S
- - 0.3V, V
S+
+0.3V
Storage Temperature Range
-65C to +150C
Ambient operating Temperature
-40C to +85C
Operating Junction Temperature
125C
Power Dissipation
See Curves
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
.
Electrical Characteristics
V
S1
+ = V
S2
+ = 5V, V
S1
- = V
S2
- = -5V, R
FV
= R
FG
= 750, R
GV
= R
GM
= O.C., A
V
= 1, R
L
V = R
LM
= 150
, C
LV
= C
LM
= 3p, C
H
= 0.33n, GAIN = 1.
Parameter Description
Conditions
Min
Typ
Max
Unit
Supply
I
S1
+
Positive Supply Current 1
35
mA
I
S
-
Negative Supply Current
V
IN
= 0, I
L
= 0
45
mA
I
S2
+
Positive Supply Current 2
V
IN
= 0, I
L
= 0
14
15
20
mA
I
S1S
+
Positive Supply Current 1 in Standby
Standby
3.8
5
7.3
mA
I
SS
-
Negative Supply Current in Standby
Standby
0.57
1
1.3
mA
I
S2S
+
Positive Supply Current 2 in Standby
Standby
-10
-
10
A
V
S1
+, V
S2
+
Positive Supply Voltage
4.5
5.0
5.5
V
V
S
-
Negative Supply Voltage
-4.5
-5.0
-5.5
V
Input
Ib
Input Bias Current
V
IN
= 0V
-22.4
-2.2
6.1
A
Ibo
Input Bias Current Drift with Temp.
V
IN
= 0V
TBD
nA/C
V
IH
Input High Voltage
2
V
V
IL
Input Low Voltage
0.8
V
V
IP
Input Voltage Swing, Pos.
Saturated Input, Att. code = 01010
3.35
3.5
V
V
IN
Input Voltage Swing, Neg.
Saturated Input, Att. code = 01010
-3.5
-3.39
V
I
IDL
Low Input Current for SCLK and ENB
V
IN
= 0V
50
85
150
A
I
IDH
High Input Current for SCLK and ENB
V
IN
=5V
0
0.1
10
A
I
IL
Low Input Current for SDI, PDWN, HOLD
V
IN
= 0V
15
48
75
A
I
IH
High Input Current for SDI, PDWN, HOLD
V
IN
=5V
0
0.1
10
A
tsh
Sample and Hold Delay Time
15
ns
tsu
Data Set Up Time
TBD
10
TBD
ns
th
Data Hold Time
TBD
10
TBD
ns
fclk
Serial Clock Rate
TBD
5
MHz
tsue
Enable Set Up Time
TBD
10
ns
the
Enable Hold Time
TBD
10
ns
tpd
Clock to Data Output Delay
C
L
= 10pF
TBD
21
ns
Output
V
OSM
Output Offset Voltage - Monitor
V
IN
= 0V
-400
30
420
mV
V
OS
DC-restore Offset Voltage
auto-zero on, DC
REF
= 0
-5
-
5
mV
T
C
V
OS
Output Offset Voltage Drift - Video
auto-zero on
15
V/C
V
O
+
Output Voltage Swing, Pos.
Attenuator = 0dB, Monitor & Video Outputs
3.44
3.5
V
V
O
-
Output Voltage Swing, Neg.
Attenuator = 0dB, Monitor & Video Outputs
-3.5
-3.43
V
V
SDO
high
Serial Data Output High
I
L
= +1mA
4.7
V
V
SDO
low
Serial Data Output Low
I
L
= -1mA
0.25
V
3
EL4102C - Preliminary
500MHz Video Front End: 4-1 MUX, VGA & DC-Restore
EL
4102C -
Preliminary
I
SC
Output Short Circuit Current
R
L
= 10
, Source or Sink
65
100
mA
AC Performance
SR
Slew Rate - Video Out (20%-80%)
V
OUT
= 4V
P-P
1000
2100
4500
V/S
SRM
Slew Rate - Monitor Out (20%-80%)
V
OUT
= 4V
P-P
1250
2100
3900
V/S
OS
Output Overshoot, Video
V
OUT
= 1V
P-P
TBD
%
OSM
Output Overshoot, Monitor
V
OUT
= 1V
P-P
TBD
%
ts
Settling Time to 1%, Video
Hold Mode
TBD
ns
tsm
Settling Time to 1%, Monitor
TBD
ns
V
REF
DC-restore Reference Voltage Range
V
IN
= -2V to +2V
-2
-
2
V
tsd
DC-restore - Settling Time to 1%
Sample Mode On
1.2
S
V
OHS
DC-restore - Video Output Hold Step
S - H Transition
-1.1
mV
V
OSB
DC-restore - Offset vs. Black Level
Sample Mode On
-1
-0.6
1
mV/V
I
CCL
DC-restore - Charge Current Limit, I
CAP
Sample Mode On
260
A
I
DC
DC-restore - Droop Current, I
CAP
Hold Mode On
-30
-
30
nA
BW
3dB Bandwidth, Video Out
Attenuator = 00000
TBD
MHz
BWM
3dB Bandwidth, Monitor Out
TBD
MHz
0.1BW
0.1dB Flat Bandwidth, Video Out
Attenuator = 00000
TBD
MHz
0.1BWM
0.1dB Flat Bandwidth, Monitor Out
TBD
MHz
Vp
Peaking, Video
TBD
dB
Vpm
Peaking, Monitor
TBD
dB
dP
Diff. Phase @3.58MHz, Video
TBD
dG
Diff. Gain @3.58MHz, Video
TBD
%
dPM
Diff. Phase @3.58MHz, Monitor
TBD
dPG
Diff. Gain @3.58MHz, Monitor
TBD
%
e
n
Noise Voltage at Input for V
OUT
TBD
nV/
Hz
e
nm
Noise Voltage at Input for M
OUT
TBD
nV/
Hz
Crosstalk
[1]
@10MHz
3 channel hostile
-45
dB
Crosstalk
[1]
@100MHz
3 channel hostile
-20
dB
Attenuator Range
-
18.2
-
dB
Attenuator Step Size
31 Steps
-
0.58
-
dB
Relative Attenuation Error
Between any 2 levels
0
-
0.2
dB
1.
Total unwanted output normalized by wanted (or expected) output; add -10dB to get channel-to-channel isolation
Electrical Characteristics
V
S1
+ = V
S2
+ = 5V, V
S1
- = V
S2
- = -5V, R
FV
= R
FG
= 750, R
GV
= R
GM
= O.C., A
V
= 1, R
L
V = R
LM
= 150
, C
LV
= C
LM
= 3p, C
H
= 0.33n, GAIN = 1.
Parameter Description
Conditions
Min
Typ
Max
Unit
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