EL6915 Datasheet, PDF (1/2 Pages) Intersil Corporation – Laser Diode Driver w/ Waveform Generator

®
Data Sheet
July 7, 2004
EL6915
FN7276.1
Laser Diode Driver w/ Waveform Generator
The EL6915 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 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 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 dual-
laser multi-standard optical heads. The clock and NRZ
inputs can be either standard CMOS or LVDS, selectable
through a program bit.
The EL6915 operates on a 5V supply for the analog circuits
and a 3.3V supply for the digital circuits.
Ordering Information
PART NUMBER PACKAGE
TAPE &
REEL
PKG. DWG. #
EL6915CL
38-Pin QFN
-
MDP0046
EL6915CL-T7
38-Pin QFN
7”
MDP0046
EL6915CL-T13 38-Pin QFN
13”
MDP0046
EL6915CLZ
38-Pin QFN
-
(Note)
(Pb-Free)
MDP0046
EL6915CLZ-T7 38-Pin QFN
7”
(Note)
(Pb-Free)
MDP0046
EL6915CLZ-T13 38-Pin QFN
13”
(Note)
(Pb-Free)
MDP0046
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.
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
• 100ps 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, and DVD+RW
• 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
• Dual sampled IV amplifier with programmable sample
select and gain select
• Programmable HFM offset when HFM is off
• Pb-free available
Applications
• Combination DVD writable and CD writable drives
• DVD camcorders
• DVD video recorders
Get FULL DATASHEET
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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