EL6900 Datasheet, PDF (1/2 Pages) Intersil Corporation – Laser Diode Driver with Waveform Generator

®
Data Sheet
July 15, 2004
EL6900
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.
Ordering Information
PART NUMBER
EL6900CL
EL6900CL-T7
EL6900CL-T13
PACKAGE
38-Pin QFN
38-Pin QFN
38-Pin QFN
TAPE & REEL PKG. DWG. #
-
MDP0046
7”
MDP0046
13”
MDP0046
Get FULL DATASHEET
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 100mA_P-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
Pinout
EL6900
(38-PIN QFN)
TOP VIEW
SCLK 1
MON1 2
RWB 3
NRZ 4
NRZB 5
GND 6
GND 7
CLKB 8
CLK 9
VSL 10
VSL 11
VSA 12
THERMAL
PAD
31 PDIN
30 VREF
29 VSO
28 IOUT1
27 IOUT1
26 GND
25 VSO
24 VSO
23 IOUT2
22 IOUT2
21 VSO
20 RSET
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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