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.
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General Description
The EL4101C VFE (Video Front End) is designed to perform the basic
input processing functions in an analog video system as well as provide
analog input processing for digital video systems. The EL4101C VFE
contains a 4:1 MUX input and a DC-restore amplifier. The MUX input
can be used to select which input to use. The DC-restore allows the
input signal to be positioned to the correct voltage level for either ana-
log or digital processing. A buffered output of the MUX selection is
also available for use as a monitor output.
With a 500MHz bandwidth and only 40mA supply current, the
EL4101C is ideal for use in portable and fixed projectors, as well as
HDTV, DTV and other high performance video applications.
The EL4101C is available in the 24-pin QSOP package and is specified
for operation over the full -40C to +85C temperature range.
Connection Diagram
Note: Pin #6 should be a good high frequency ground
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
VS1-
IN3
N.C.
D0
D1
CAP
DCREF
DCFDBK
VFDBK
VOUT
VS2+
VS2-
MOUT
MFDBK
GNDL
PDWN
N.C.
HPULSE
SIG0
+5V
SIG1
SIG2
-5V
SIG3
LOGICD0
LOGICD1
Video Out
R
LV
=150
Monitor Out
R
LM
=150
LOGICPD
0.33F
DCV
R
GV
R
FV
+5V
-5V
R
FM
R
GM
Features
4:1 multiplexer with monitor out
DC-restore amplifier
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 #
EL4101CU
24-Pin QSOP
MDP0040
EL4101C - Preliminary
500MHz Video Front End - 4:1MUX + DC-Restore
A
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2
EL4101C - Preliminary
500MHz Video Front End - 4:1MUX + DC-Restore
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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
Electrical Characteristics
V
S1
+ = V
S2
+ = 5V, V
S1
- = V
S2
- = -5V, R
FV
= R
GV
= R
FM
= R
GM
=375, R
LV
= R
LM
= 150
, C
LV
= C
LM
= 3p, C
H
= 0.33n, GAIN = 2.
Parameter
Parameter Description
Conditions
Min
Typ
Max
Unit
Supply
I
S1
+
Positive Supply Current 1
25
mA
I
S
-
Negative Supply Current
38
mA
I
S2
+
Positive Supply Current 2
V
IN
= 0, I
L
= 0
15
mA
I
S1S
+
Positive Supply Current 1 in Standby
Standby
3.8
mA
I
SS
-
Negative Supply Current in Standby
Standby
2
mA
I
S2S
+
Positive Supply Current 2 in Standby
Standby
236
A
Input
I
B
Input Bias Current
V
IN
= 0V
-22.4
-2.2
6.1
A
I
BO
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
I
IL
Low Input Current for D0, D1, PDWN, HOLD
V
IN
= 0V
25
48
75
A
I
IH
High Input Current for D0, D1, PDWN, HOLD
V
IN
=5V
0
-
10
A
t
SH
Sample and Hold Delay Time
12
ns
Output
V
OSM
Output Offset Voltage - Monitor
V
IN
= 0V
-400
18
420
mV
V
OS
DC-restore Offset Voltage
Auto-zero on, DC
REF
= 0
-5
-
5
mV
V
OS
Output Offset Voltage Drift - Video
Auto-zero on
TBD
V/C
V
OH
Output Voltage Swing, Pos.
A
V
= +1, monitor & video outputs
3.44
3.5
V
V
OL
Output Voltage Swing, Neg.
A
V
= +1, monitor & video outputs
-3.43
-3.5
V
I
SC
Output Short Circuit Current
R
L
= 10
,
source or sink
65
100
140
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
%
t
S
Settling Time to 1%, Video
Hold mode
10
ns
t
SM
Settling Time to 1%, Monitor
10
ns
V
REF
DC-restore -Reference Voltage Range
V
IN
= -2V to +2V
-2
-
2
V
t
SD
DC-restore - Settling Time to 1%
Sample mode on
2.5
s
V
OHS
DC-restore - Video Output Hold Step
S - H transition
-0.5
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
210
260
345
A
I
DC
DC-restore - Droop Current, I
CAP
Hold mode on
-30
-
30
nA
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
.
3
EL4101C - Preliminary
500MHz Video Front End - 4:1MUX + DC-Restore
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BW
3dB Bandwidth, Video Out
500
MHz
BWM
3dB Bandwidth, Monitor Out
1000
MHz
0.1BW
0.1dB Flat Bandwidth, Video Out
25
MHz
0.1BWM
0.1dB Flat Bandwidth, Monitor Out
18
MHz
Vp
Peaking, Video
2.4
dB
Vpm
Peaking, Monitor
4.5
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 VOUT
TBD
nV/
Hz
e
nm
Noise Voltage at Input for MOUT
TBD
nV/
Hz
Crosstalk
[1]
@10MHz
3 channel hostile
-45
dB
Crosstalk
[1]
@100MHz
3 channel hostile
-20
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
GV
= R
FM
= R
GM
=375, R
LV
= R
LM
= 150
, C
LV
= C
LM
= 3p, C
H
= 0.33n, GAIN = 2.
Parameter
Parameter Description
Conditions
Min
Typ
Max
Unit
Parallel Programming Truth Table
Inputs
State
PDWN
D1
D0
0
0
0
IN0 Selected
0
0
1
IN1 Selected
0
1
0
IN2 Selected
0
1
1
IN3 Selected
1
X
X
Standby - Powered Down
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EL4101C - Preliminary
500MHz Video Front End - 4:1MUX + DC-Restore
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Pin Descriptions
Pin Number
Pin Name
Pin Type
Pin Description
1
HOLD
Logic Input
Hold pulse for DC-restore function
2
GNDL2
Logic Ground
Logic ground for "hold" buffer
3
IN0
High Frequency Signal
Video input #0
4
VS1+
Power
Positive power pin for quiet supply currents
5
IN1
High Frequency Signal
Video input #1
6
GNDI
Analog Signal
Reference voltage for attenuation function
7
IN2
High Frequency Signal
Video input #2
8
VS1-
Power
Negative power pin for quiet supply currents
9
IN3
High Frequency Signal
Video input #3
10
No connection
11
D0
Logic Input
Parallel control bit #0
12
D1
Logic Input
Parallel control bit #1
13
No connection
14
PDWN
Logic Input
Power down input to put chip in low current standby mode
15
GNDL
Logic Ground
Logic ground for D0, D1, PWDN buffers
16
MFDBK
High Frequency Signal
Monitor amplifier feedback
17
MOUT
High Frequency Signal
Monitor amplifier output
18
VS2-
Power
Negative power pin for heavy, pulsatile supply currents
19
VS2+
Power
Positive power pin for heavy, pulsatile supply currents
20
VOUT
High Frequency Signal
Video amplifier output
21
VFDBK
High Frequency Signal
Video amplifier feedback
22
DCFDBK
Analog Signal
Input to sample circuit
23
DCREF
Analog Signal
Reference DC voltage representing black level
24
CAP
Analog Signal
Sample storage capacitor for DC-restore circuit
5
EL4101C - Preliminary
500MHz Video Front End - 4:1MUX + DC-Restore
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Block Diagram (Gain of 1)
-
+
-
+
-
+
Input Video
Input Video
Input Video
Input Video
V
S
+
IN0
IN1
IN2
IN3
GNDL
GND
GNDL2
V
S
-
P
DWN
750
M
OUT
V
OUT
DC
REF
HOLD
CAP
750
V
FDBK
M
FDBK
DC
FDBK
C
H
D0
D1
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