View EL4501CS_484393.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Features
* * * * * * * * DC restore and sync separator Wideband (100MHz) DC restore Advanced sync separator Programmable data slicer Single 5 volt operation Differential Gain = 0.1% Differential Phase = 0.1 Low power (<75mW)
General Description
The EL4501C Video Front End (VFE) is an integrated solution 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 system. The VFE contains a high bandwidth DC Restore, a sophisticated Sync Separator, and a Data Slicer for embedded 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 noise immunity by incorporating a signal qualification 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 package that takes only 0.08in2(54mm2) of board area, as well as a standard 24 pin SOIC.
Applications
* * * * * Video Capture & Editing Video Projectors Set Top Boxes Security Video Embedded data recovery
Ordering Information
Part No. EL4501CS EL4501CU Temp. Range -40C to +85C -40C to +85C Package 24-Pin SOIC 24-Pin QSOP Outline # MDP0027 MDP0031
Connection Diagram
VFB 1 VIDEO_IN 2 DS_MODE 3 DS_ENAB 4 GND 5 GNDD 6 RFREQ 7 FSEL 8 SYNC_IN 9 LOS 10 COMPOSITE 11 HORIZONTAL 12 24 VIDEO_OUT 23 DS_OUT 22 DS_REF 21 REF_IN 20 REF_OUT 19 VS 18 VSD 17 SYNC_AMP
September 7, 2000
16 NC 15 BACK_PORCH 14 ODD/EVEN 13 VERTICAL
(c) 2000 Elantec Semiconductor, Inc.
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Absolute Maximum Ratings (T
A
= 25C)
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. +6V Supply Voltage (VS to GND) Input Voltage GND - 0.3V, VS +0.3V
Storage Temperature Range Ambient Operating Temperature Operating Junction Temperature Power Dissipation
-65C to +150C -40C to +85C 125C 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: TJ = TC = TA.
Electrical Characteristics
VS = +5V, GND = 0V, TA = 25C, Input Video = 1VP-P unless otherwise specified. Parameter IS VOP Supply Current Positive Output Voltage Swing Video Amplifier Section RL = 150 to VS/2 RL = 150 to GND RL = 1k to VS/2 VON Negative Output Voltage Swing RL = 150 to VS/2 RL = 150 to GND RL = 1k to VS/2 +IOUT -IOUT dG dP BW BW1 SR VRL ts RIN CIN AVOL Positive Output Current Negative Output Current Differential Gain Error Differential Phase Error Bandwidth Bandwidth Slew Rate Ref Level Range Settling Time Input Resistance (VIDEO_IN) Input Capacitance (VIDEO_IN) Open Loop Voltage Gain RL = no load, VOUT = 0.5V to 3V RL = 150 to GND, VOUT = 0.5V to 3V DC Restore Section CMIR VOS TCVOS IB IIH IIL VIH VIL VOH VOL IOUT Common Mode Input Range (REF_IN) Input Offset Voltage Input Offset Voltage Temperature Coefficient Input Bias Current (REF_IN) Input High Current (DS_MODE & DS_ENAB) Input Low Current (DS_MODE & DS_ENAB) Input High Voltage (DS_MODE & DS_ENAB) Input Low Voltage (DS_MODE & DS_ENAB) Output High Voltage (DS_OUT) Output Low Voltage (DS_OUT) Short Circuit Current (DS_OUT) IOUT = -1mA IOUT = 1mA RL = 10 to 2.5V 15 4.75 4.9 0.1 20 0.25 VCM = 0V to 3.5V VIH = 5V VIL = 0V 4.5 0.5 CMRR TBD dB DC restored 0 -20 10 1 4 1 100 6 100 3.5 +20 V mV V/C nA A nA V V V V mA 54 40 to 0.1%, VIN = 0V to 3V 90
[1] [1]
Description
Conditions No Load, VIN = 0V
Min
Typ
Max 20
Unit mA V V V
4.70 4.20 4.95
4.85 4.60 4.97 0.15 0 0.03 0.05 120 -80 0.30
V V V mA mA % MHz MHz MHz V/s
RL = 10 to VS/2 RL = 10 to VS/2 Standard NTSC test, AV = 2, RL = 150 Standard NTSC test, AV = 2, RL = 150 -3dB, G = 1, RL = 10k to GND -3dB, G = 1, RL = 150 to GND +/-0.1dB, G = 2, RL = 150 to GND 25% to 75%, 3.5VP-P, RL = 150
60 -50
80 -60 0.1 0.1 100 60 8
150 0
200 3.5 35 115 1.5 65 50 140
V ns k pF dB dB
Data Slicer Section
2
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Electrical Characteristics
VS = +5V, GND = 0V, TA = 25C, Input Video = 1VP-P unless otherwise specified. Parameter IB Vos VHYS tPD tR/F VOH VOL VTHSRH TCD TCD VSR RINSR VRANGE tCD tBD tBW tHD tHW tVW tVDD fH VLOS tJIT VREF Description Input Bias Current (DS_REF) Input Offset Voltage Hysteresis Propagation Delay Rise/Fall Time Output High Voltage Output Low Voltage Slicing Level Composite Sync Delay Composite Sync Delay Sync In Reference Level Sync Reference Input Impedance Input Dynamic Range Comp Sync Delay Back Porch Delay Back Porch Width Horiz Sync Delay Horiz Sync Width Vert Sync Width Vert Sync Default Delay Horiz Scan Rate LOS Detect Threshold Output Jitter Reference Output Voltage (REF_OUT) Serrations No serrations RFREQ = xx to yy k Compared to Sync Tip Amplitude All sync separator outputs IOUT = +2mA to -0.5mA 1.2 1.3 From 50% point of leading edge of sync From 50% point of leading edge of sync From 50% point of trailing edge of sync 0.5 50 340 2.7 350 3.7 185 51 15 72 5 1.4 75 430 3.0 450 4.7 195 63.5 With Filter Without Filter 50% to 50% 10% to 90%, RL = 150k, CL = 5pF IOH = -1.6mA IOL = 1.6mA 45 TBD TBD 1.5 90 2.0 100 520 3.3 550 5.7 205 76 130 50 4.6 0.4 55 TBD TBD V k Vp-p ns ns s ns s s s kHz mV ns V Conditions DS_REF = 0V & 5V Min -100 -20 10 18 1.2 Typ 1 Max 100 +20 15 28 1.8 Unit nA mV mV ns ns V V %
Sync Separator Section
Reference Section
3
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Typical Performance Curves
4
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Timing Diagrams
Fields One and Three (ODD) Composite Signal
Composite Sync Output
Burst/Back Porch Output
Horizontal Sync Output
Vertical Sync Output
Odd/Even Output
Fields Two and Four (EVEN) Composite Signal
Composite Sync Output
Burst/Back Porch Output
Horizontal Sync Output
Vertical Sync Output
Odd/Even Output
5
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Timing Diagrams (cont.)
Video In
Composite Sync Output tCD Burst/Back Porch Output tHD tHW tBD tBW
Horizontal Sync Output
Video In
Vertical Sync Output t<< tCD
tCD+t
ODD/EVEN
tCD+2t
6
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Pin Description
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 Pin Name VFB VIDEO_IN DS_MODE DS_ENAB GND GNDD RFREQ FSEL SYNC_IN LOS COMPOSITE HORIZONTAL VERTICAL ODD/EVEN BACK_PORCH SYNC_AMP VSD VS REF-OUT REF_IN DS_REF DS_OUT VIDEO_OUT Pin Type Input Input Input Input Input Input Input Input Input Output Output Output Output Output Output Output Input Input Output Input Input Output Output Pin Description Connection for gain and feedback resistors, RF and RG. Input to DC restore amplifier. Input coupling capacitor connects from here to video source. Sets the mode of the DS comparator. Logic high selects a standard logic output. Logic low selects an open drain/collector. Enables the output of the comparator. A logic high enables the comparator. A logic low tri-states it. Analog ground. Digital ground Connection for bias resistor that sets the overall timing. Enable/ bypass internal brick wall filter. A logic high is used to enable the filter, a logic low to disable it. Input to the sync separator. Connects to the video source via a coupling capacitor, or to a color burst input filter. Loss of signal output. Goes high if no input video signal is detected. Composite sync output. Horizontal sync output. Vertical sync output. Odd/Even field indicator output. Back porch output. Amplitude of sync tip. Can be used to control AGC circuit. Digital power supply. Nominally +5V Analog power supply. Nominally +5V. Voltage reference for use as blanking level in low cost system Dc voltage on this pin sets the DC restore voltage and output blanking level. Sets the slicing level or reference level for the comparator. Output of the data slicing comparator. The output is either open drain/collector or standard symmetrical logic depending on the DS_MODE pin. Output of DC restore amplifier.
7
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Block Diagram
VS VSD DS_REF DS_MODE VIDEO_IN + 0.1uF VIDEO_OUT VFB RF + DS_ENAB DS_OUT
Input video
SYNC_IN 0.1uF
+ 1.3V + - REF_IN REF_OUT
RG
LOS' FSEL SYNC_AMP LOS RFREQ Filter Sync Separator BACK_PORCH COMPOSITE HORIZONTAL VERTICAL ODD/EVEN
GND
GNDD
8
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
Description of Operation
The EL4501C incorporates the following functional blocks: * DC restore amplifier * Advanced sync separator * Data Slicer Combined they provide the key analog processing functions for a number of video system applications. The operation of each of these blocks is described below. also includes a qualification scheme which rejects noise pulses and other video artifacts. The horizontal line rate timing is controlled with the use of a resistor, RFREQ. The following outputs are available: * Composite sync * Horizontal sync * Vertical sync * Burst gate * Odd/Even field identification * Loss of signal detected * Sync amplitude detected
Sync Separator
The sync separator contained in the EL4501C has been designed to be compatible with a wide range of video signal standards, operating with horizontal line rates from PAL/NTSC rates up to 150kHz. The sync separator
9
EL4501C - Preliminary
EL4501C - Preliminary
Video Front End
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 circuitry 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.
WARNING - Life Support Policy
September 7, 2000
Elantec Semiconductor, Inc.
675 Trade Zone Blvd. Milpitas, CA 95035 Telephone: (408) 945-1323 (888) ELANTEC Fax: (408) 945-9305 European Office: +44-118-977-6080 Japan Technical Center: +81-45-682-5820
10
Elantec, Inc. products are not authorized for and should not be used within Life Support Systems without the specific written consent of Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. Users contemplating application of Elantec, Inc. Products in Life Support Systems are requested to contact Elantec, Inc. factory headquarters to establish suitable terms & conditions for these applications. Elantec, Inc.'s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages.
Printed in U.S.A.

▲Up To Search▲

Price & Availability of EL4501CS

	To Download EL4501CS Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .