ELANT EL4501CU, EL4501CS Datasheet
EL4501C - Preliminary
Vi deo Front End
EL4501C - Preliminary
Features
• DC restore and sync s e parator
• Wideband (100MHz) DC restore
• Advanced sync separator
• Programmable data slicer
• Single 5 volt operation
• Differential Gain = 0.1%
• Differential Phase = 0.1°
• Low power (<75 mW)
Applications
• Video Capture & Editing
• Video Projectors
• Set Top Boxes
• Security Video
• Embedded data recovery
Ordering Information
Part No. Temp. Range Package Outline #
EL4501CS -40°C to +85°C 24-Pin SOIC MDP0027 EL4501CU -40°C to +85°C 24-Pin QSOP MDP0031
General Description
The EL4501C Video Front End (VFE) is an in tegrated soluti on that
provides the key analog signal conditioning functions for analog video
signals. It forms the front end interface for either an analog or analog/digital video syst em. The VFE contain s a high bandwidth DC
Restore, a sophistica ted Sync Se para tor, and a Data Sl icer for e mbedded data recovery.
The VFE will perform the restoration of the DC reference level
(blanking level) and the extraction of all of the necessary timing signals needed for synchronization and control. The sync separator is
designed for very good nois e im mun ity by incor pora ting a sign al q ualification scheme and internal brick wall filter. A data slicer is also
included to help decode data embedded in the active video or VBI
areas of the signal.
The VFE operates from a single 5 volt supply and is available in a
small 24 pin QSOP pac kag e tha t ta kes on ly 0.0 8in
2
(54mm
2
) of board
area, as well as a standard 24 pin SOIC.
Connection Diagram
1
VIDEO_OUTVFB
24
© 2000 Elantec Semiconductor, Inc.
VIDEO_IN
DS_MODE
DS_ENAB
GND
GNDD
RFREQ
FSEL
SYNC_IN
LOS
COMPOSITE
HORIZONTAL
2
3
4
5
6
7
8
9
10
11
12
DS_OUT
23
DS_REF
22
REF_IN
21
REF_OUT
20
VS
19
VSD
18
SYNC_AMP
17
NC
16
BACK_PORCH
15
ODD/EVEN
14
VERTICAL
13
September 7, 2000
EL4501C - Preliminary
Video Front End
Absolute Maximum Ratings (T
Values beyond absolute maximum ratings can cause the device to be prematurely damaged. Absolute maximum ratings are stress ratings only and
functional device operation is not implied.
Supply Voltage (V
EL4501C - Preliminary
Input Voltage GND - 0.3V, V
to GND) +6V
S
= 25°C)
A
+0.3V
S
Storage Temperature Range -65°C to +150°C
Ambient Operating Temperature -40°C to +85°C
Operating Junction Temperature 125°C
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
= TC = TA.
J
Electrical Characteristics
VS = +5V, GND = 0V, TA = 25°C, Input Video = 1V
Parameter Description Conditions Min Typ Max Unit
I
S
Supply Current No Load, V
Video Amplifier Section
V
OP
V
ON
+I
OUT
-I
OUT
dG Differential Gain Error
dP Differential Phase Error
Positive Output V oltage Swing RL = 150Ω to V
Negative Output V oltage Swing RL = 150Ω to V
Positive Output Current RL = 10Ω to V
Negative Output Current RL = 10Ω to V
[1]
[1]
BW Bandwidth -3dB, G = 1, R
BW1 Bandwidth +/-0.1dB, G = 2, R
SR Slew Rate 25% to 75%, 3.5V
V
RL
Ref Level Range 03.5V
ts Settling Time to 0.1%, V
R
IN
C
IN
A
VOL
Input Resistance (VIDEO_IN) 90 115 140 kΩ
Input Capacitance (VIDEO_IN) 1.5 pF
Open Loop Voltage Gain RL = no load, V
DC Restore Section
CMIR Common Mode Input Range (REF_IN) CMRR ≥ TBD dB 0 3.5 V
V
OS
TCV
I
B
Input Offset Voltage DC restored -20 +20 mV
Input Offset Voltage Temperature Coefficient 10 µV/°C
OS
Input Bias Current (REF_IN) VCM = 0V to 3.5V 1 100 nA
Data Slicer Section
I
I
V
V
V
V
I
IH
IL
IH
IL
OH
OL
OUT
Input High Current (DS_MODE & DS_ENAB) VIH = 5V 4 6 µA
Input Low Current (DS_MODE & DS_ENAB) VIL = 0V 1 100 nA
Input High Voltage (DS_MODE & DS_ENAB) 4.5 V
Input Low Voltage (DS_MODE & DS_ENAB) 0.5 V
Output High V oltage (DS_OUT) I
Output Low Voltage (DS_OUT) I
Short Circuit Current (DS_OUT) RL = 10Ω to 2.5V 15 20 mA
unless otherwise specified.
P-P
R
= 150Ω to GND 4.20 4.60 V
L
R
= 1k to V
L
R
= 150Ω to GND 0 V
L
R
= 1k to V
L
Standard NTSC test, AV = 2, RL = 150Ω 0.1 %
Standard NTSC test, AV = 2, RL = 150Ω 0.1 °
-3dB, G = 1, R
R
= 150Ω to GND, V
L
= -1mA 4.75 4.9 V
OUT
= 1mA 0.1 0.25 V
OUT
= 0V 20 mA
IN
S
/2
S
/2
S
/2
S
/2
S
/2
S
/2
L = 10kΩ to GND 100 MHz
L = 150Ω to GND 60 MHz
L = 150Ω to GND 8 MHz
, RL = 150Ω 150 200 V/µs
P-P
= 0V to 3V 35 ns
IN
= 0.5V to 3V 54 65 dB
OUT
= 0.5V to 3V 40 50 dB
OUT
4.70 4.85 V
4.95 4.97 V
0.15 0.30 V
0.03 0.05 V
60 80 120 mA
-50 -60 -80 mA
2
EL4501C - Preliminary
Video Front End
Electrical Characteristics
VS = +5V, GND = 0V, TA = 25°C, Input Video = 1V
Parameter Description Conditions Min Typ Max Unit
I
B
Input Bias Current (DS_REF) DS_REF = 0V & 5V -100 1 100 nA Vos Input Offset Voltage -20 +20 mV V
HYS
t
PD
t
R/F
Hysteresis 10 15 mV
Propagation Delay 50% to 50% 18 28 ns
Rise/Fall Time 10% to 90%, RL = 150k, CL = 5pF 1.2 1.8 ns
Sync Separator Section
V
OH
V
OL
V
THSRH
T
CD
T
CD
V
SR
R
INSR
V
RANGE
t
CD
t
BD
t
BW
t
HD
t
HW
t
VW
t
VDD
f
H
V
LOS
t
JIT
Output High V oltage I
Output Low V oltage I
Slicing Level 45 50 55 %
Composite Sync Delay With Filter TBD TBD
Composite Sync Delay Without Filter TBD TBD
Sync In Reference Level 1.5 V
Sync Reference Input Impedance 90 kΩ
Input Dynamic Range 0.5 2.0 Vp-p
Comp Sync Delay From 50% point of leading edge of sync 50 75 100 ns
Back Porch Delay From 50% point of trailing edge of sync 34 0 430 520 ns
Back Porch Width 2.7 3.0 3.3 µs
Horiz Sync Delay From 50% point of leading edge of sync 350 450 550 ns
Horiz Sync Width 3.7 4.7 5.7 µs
V ert Sync Width Serrations 185 195 205 µs
Vert Sync Default Delay No serrations 51 63.5 76 µs
Horiz Scan Rate R
LOS Detect Threshold Compared to Sync Tip Amplitude 72 mV
Output Jitter All sync separator outputs 5 ns
Reference Section
VREF Reference Output Voltage (REF_OUT) I
unless otherwise specified.
P-P
= -1.6mA 4.6 V
OH
= 1.6mA 0.4 V
OL
= xx to yy kΩ 15 130 kHz
FREQ
= +2mA to -0.5mA 1.2 1.3 1.4 V
OUT
EL4501C - Preliminary
3
Loading...