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Part: EL6918
Category:
Description: Laser Diode Driver, Dual With Waveform Generator, 8x8 DAC, Programmable, 350mA Output, DVD & CD
Company: Intersil Corporation
Datasheet: Download EL6918 datasheet File size : 84 kB
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Datasheet text preview:
®
EL691 8
P r od uc t Brief Ap ri l 23, 2003 FN7237
Laser Diode Driver with Waveform Generator
The EL6918 is a highly integrated laser diode driver designed to support multi-standard writable optical drives. It accomplishes this by incorporating a waveform generator wherein the diode currents and timing details can be programmed before operation. The data input circuitry inspects the NRZ serial data waveform and generates programmed waveforms in recognition of 3, 4, 5, or 6 or more clock periods of space changing to 3, 4, 5, or 6 or more clock periods of mark, and vice versa. NRZ and clock are LVDS. The architecture allows reprogramming of the timers to support different media, DVD or CD standards, and different speeds. The programming is accomplished through a serial interface port. Two outputs are provided to support duallaser multi-standard optical heads. The clock and NRZ inputs can be either standard CMOS or LVDS, selectable through a program bit. The EL6918 requires 3.3V and 5V supplies, with all the logical interface operating on the 3.3V supply.
Features
· Complete programmable laser diode driver · 350mA maximum total output · 8bit x 8bit multiplying DAC output provides 8bit full scale adjustment and 8bit resolution at any full scale output · 100 psec timer resolution · Two laser outputs allows read/write DVD and CD combinations · Programmable waveform values support 2.6GB DVDRAM, 4.7GB DVD-RAM, DVD-R, DVD+RW, DVD-RW, CD-RW, and CD-R · Two analog inputs support slope and read APC · HFM oscillator programmable to 100mAP-P from 200MHz to 600MHz · PLL allows reduced-frequency clock on flex cable · Separate serial input works up to 25MHz · Programmable HFM offset when HFM is off
Applications
· Combination DVD writable and CD writable drives · DVD camcorders · DVD video recorders
Pinout
EL6918 (32-PIN LPP) TOP VIEW
Ordering Information
32 MON1 2 8 BUSY 31 SCLK 30 SDIO 29 SEN
PART NO.
2 7 NC 2 6 NC
TEMP. RANGE 0°C to +70°C
PACKAGE 32-Pin LPP
PKG. NO. MD P 0 0 4 6
EL6918CL
2 5 VSO 24 OUT1 23 OUT1 22 GND
RWB 1 NRZ 2 NRZB 3 GND 4 GND 5 CLKB 6 CLK 7 VSL 8 VSA 9 L/G 10 RFREQ 11 IAPC 12 ISLOPE 13 GND 14 ENA 15 RSET 16 THERMAL PAD
2 1 VSO 2 0 VSO 19 OUT2 18 OUT2 1 7 VSO
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners.
E6918
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 2
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