EL4584C Elantec Semiconductor, Inc. (acquired by Intersil), EL4584C Datasheet
EL4584C
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EL4584C Summary of contents
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... EL4584C Horizontal Genlock 4 F General Description The EL4584C is a PLL (Phase Lock Loop) sub system designed for video applications but also suitable for general purpose use MHz In a video application this device generates a TTL CMOS compatible Pixel Clock (Clk Out) which is a multi- ...
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... EL4584C Horizontal Genlock Absolute Maximum Ratings V Supply CC Storage Temperature Lead Temperature Pin Voltages b Operating Ambient Temperature Range Important Note All parameters having Min Max specifications are guaranteed The Test Level column indicates the specific device testing actually performed during production and Quality inspection Elantec performs most electrical tests using modern high-speed automatic test ...
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... H-sync S N Ratio V 5V (Note Jitter VCXO Oscillator Jitter LC Oscillator (Typ) Note 2 Noisy video signal input to EL4583C H-sync input to EL4584C Test for positive signal lock Pin Description Pin No Pin Name Prog Digital inputs to select d 3 Osc VCO Out ...
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... EL4584C Horizontal Genlock 4 F Timing Diagrams PLL Locked Condition (Phase Error Falling edge of H-sync 110 ns locks to rising edge of Ext Div signal 4584 – 2 Out of Lock Condition Test Circuit 1 4584 – 360 H-sync period phase error period ...
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... Typical Performance Curves Idd vs Fosc Typical Varactor Charge Pump Duty Cycle vs Horizontal Genlock 4 F 4584 OSC Gain 20 MHz vs Temp 4584 – 4 OSC Gain vs Fosc 4584 – 4584 – EL4584C SC 4584 – 6 4584 – 8 ...
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... EL4584C Horizontal Genlock 4 F Block Diagram SC 6 4584 – 1 ...
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... The clock is generated by the signal on pin 5 OSC in There are 2 general types of VCO that can be used with the EL4584C LC and crys- tal controlled Additionally each type can be ei- ther built up using discrete components includ- ...
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... EL4584C Horizontal Genlock 4 F Description of Operation External Divide DIV SEL (pin 8) controls the use of the internal divider When high the internal divider is en- abled and EXT DIV (pin 13) outputs the CLK out divided by N This is the signal to which the horizontal sync input will lock When divide se- ...
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... LC VCO Component Values (Approximate) Frequency (MHz 301 for our 734 so we choose 10 738 12 273 14 318 Note Use shielded inductors for optimum performance 9 EL4584C SC Typical LC VCO 4584 – 10 Figure (pF) (pF 220 15 17 220 12 18 220 ...
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... Where loop filter bandwidth and e n filter damping factor 1 K 300 A 2 rad e d EL4584C 2 The loop bandwidth should be about H-sync frequency 20 and the damping ratio should be 1 for optimum performance For our example 15 734 kHz 910 from table 1 e 4584 – ...
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... Xtal Loop Filter Components (Approximate) Frequency (MHz) 13 301 in 734 10 738 12 273 14 318 11 EL4584C SC 4584 – 100 001 100 001 100 ...
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... EL4584C Horizontal Genlock 4 F PCB Layout Considerations It is highly recommended that power and ground planes be used in layout The oscillator and filter sections constitute a feedback loop and thus care must be taken to avoid any feedback signal influ- encing the oscillator except at the control input ...
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... Demo Board EL4584C Horizontal Genlock ...
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... EL4584C Horizontal Genlock 4 F The VCO and loop filter section of the EL4583 4 5 demo board can be implemented in the following configurations SC (1) VCXO (2) XTAL (3) LC Tank 14 4584 – 20 4584 – 21 4584 – 22 ...
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... EL4584C Horizontal Genlock 4 F Component Sources Inductors Dale Electronics E Highway 50 PO Box 180 Yankton SD 57078-0180 (605) 665-9301 Crystals VCXO VCO Modules Connor-Winfield 2111 Comprehensive Drive Aurora IL 60606 (708) 851-4722 Piezo Systems 100 K Street PO Box 619 Carlisle PA 17013 (717) 249-2151 Reeves-Hoffman 400 West North Street ...