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EL6900
Data Sheet July 15, 2004 FN7275
Laser Diode Driver with Waveform Generator
The EL6900 is a highly integrated laser diode driver designed to support Blu-Ray 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 2, 3, 4, or 5 or more clock periods of space changing to 2, 3, 4, or 5 or more clock periods of mark, and vice versa. The part also has an IV amplifier with concurrent read and write sampling. The gains of the IV amplifier are programmable, eliminating the need for external potentiometers. The architecture allows reprogramming of all output waveform parameters. The programming is accomplished through a serial interface port. The clock and NRZ inputs can be either standard CMOS or LVDS, selectable through a program bit. The EL6900 operates on a 5V supply for the analog circuits and a 3.3V supply for the digital circuits.
Features
* Complete programmable laser diode driver * 350mA maximum total output * 8-bit x 8-bit multiplying DAC output provides 8-bit full scale adjustment and 8-bit resolution at any full scale output * 120ps timer resolution * Blu-Ray Disc standard * Two analog inputs support slope and read APC * HFM oscillator programmable to 100mAP-P from 100MHz to 500MHz * PLL allows reduced-frequency clock on flex cable * Separate serial input works up to 25MHz * Dual sampled IV amplifier with programmable sample select and gain select * Programmable HFM offset when HFM is off
Applications
* Blu-Ray ultra-density optical (UDO) drives * Blu-Ray consumer HDTV video recorders
Ordering Information
PART NUMBER EL6900CL EL6900CL-T7 EL6900CL-T13 PACKAGE 38-Pin QFN 38-Pin QFN 38-Pin QFN TAPE & REEL PKG. DWG. # 7" 13" MDP0046 MDP0046
Pinout
EL6900 (38-PIN QFN) TOP VIEW
35 RGAINB 32 RGAINA 31 PDIN 30 VREF 29 VSO 28 IOUT1 27 IOUT1 26 GND THERMAL PAD 25 VSO 24 VSO 23 IOUT2 22 IOUT2 21 VSO 20 RSET LGB 13 RFREQ 14 IAPC 15 ISLOPE 16 PGND 17 GND 18 MON2 19 34 VOUTB 33 VOUTA 38 SDIO 37 SEN 36 VSH
MDP0046
SCLK 1 MON1 2 RWB 3 NRZ 4
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NRZB 5 GND 6 GND 7 CLKB 8 CLK 9 VSL 10 VSL 11 VSA 12
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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 (c) Intersil Americas Inc. 2003-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners.
EL6900
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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