®
EL6934
Data Sheet
March 17, 2004
FN7407
Laser Diode Driver with Waveform
Generator
The EL6934 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.
The architecture allows reprogramming of the timers to
support different media, Blue, DVD, or CD standards, and
different speeds. The programming is accomplished through
a serial interface port. Two outputs are provided to support
dual-laser multi-standard optical heads. The clock and NRZ
inputs can be either standard CMOS or LVDS, selectable
through a program bit.
The EL6934 requires 2.5V and 5V supplies, with all the
logical interface operating on the 2.5V supply.
Features
• Complete programmable laser diode driver
• 450mA maximum total output
• 10-bit x 10-bit multiplying DAC output provides 10-bit full
scale adjustment and 10-bit resolution at any full scale
output
• 60 psec timer resolution
• Two laser outputs allows read/write DVD and CD
combinations
• Programmable waveform values support CD-R, CD-RW,
DVD-RAM, DVD-R, DVD-RW, DVD+R, DVD+RW, and
Blue
• Two analog inputs support slope and read APC
• HFM oscillator programmable to 100mA
P-P
from 100MHz
to 500MHz
• PLL allows reduced-frequency clock on flex cable
• Separate serial input works up to 100MHz
• Programmable HFM offset when HFM is off
Ordering Information
PART NUMBER
EL6934CLZ
(Note)
EL6934CLZ-T7
(Note)
EL6934CLZ-T13
(Note)
PACKAGE
32-Pin QFN
(Pb-Free)
32-Pin QFN
(Pb-Free)
32-Pin QFN
(Pb-Free)
TAPE &
REEL
-
7”
13”
PKG. DWG. #
MDP0046
MDP0046
MDP0046
Applications
• Combination DVD writable and CD writable drives
• DVD camcorders
• DVD video recorders
NOTE: Intersil Pb-Free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and Pb-
free soldering operations. Intersil Pb-Free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
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