EL6900 ® Data Sheet 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. July 15, 2004 FN7275 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 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. • Dual sampled IV amplifier with programmable sample select and gain select The EL6900 operates on a 5V supply for the analog circuits and a 3.3V supply for the digital circuits. • Blu-Ray ultra-density optical (UDO) drives Ordering Information • Programmable HFM offset when HFM is off Applications • Blu-Ray consumer HDTV video recorders Pinout TAPE & REEL PKG. DWG. # 38-Pin QFN 7” MDP0046 EL6900CL-T13 38-Pin QFN 13” MDP0046 Get FULL DATASHEET 32 RGAINA EL6900CL-T7 EL6900 (38-PIN QFN) TOP VIEW 33 VOUTA MDP0046 34 VOUTB - 35 RGAINB 38-Pin QFN 36 VSH EL6900CL 37 SEN PACKAGE 38 SDIO PART NUMBER SCLK 1 31 PDIN MON1 2 30 VREF RWB 3 29 VSO NRZ 4 28 IOUT1 NRZB 5 27 IOUT1 GND 6 26 GND THERMAL PAD GND 7 25 VSO CLKB 8 24 VSO 1 MON2 19 20 RSET GND 18 VSA 12 PGND 17 21 VSO ISLOPE 16 22 IOUT2 VSL 11 IAPC 15 VSL 10 RFREQ 14 23 IOUT2 LGB 13 CLK 9 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. 2003-2004. 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