1
FN7275
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2003-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
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EL6900
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 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
Ordering Information
PART NUMBER
PACKAGE
TAPE & REEL PKG. DWG. #
EL6900CL
38-Pin QFN
-
MDP0046
EL6900CL-T7
38-Pin QFN
7"
MDP0046
EL6900CL-T13
38-Pin QFN
13"
MDP0046
31
30
29
28
27
26
25
38
37
36
35
34
13
14
15
16
17
1
2
3
4
5
6
7
THERMAL
PAD
SCLK
MON1
RWB
NRZ
NRZB
GND
GND
PDIN
VREF
VSO
IOUT1
IOUT1
GND
VSO
SDI
O
SE
N
VS
H
RGAINB
VO
UT
B
LGB
RFR
E
Q
IAPC
ISLOP
E
PGND
8
9
24
23
18
33
19
32
VSO
IOUT2
GND
MO
N
2
CLKB
CLK
VO
UT
A
RGAINA
10
11
12
22
21
20
VSL
VSL
VSA
IOUT2
VSO
RSET
Data Sheet
July 15, 2004
Get FULL DATASHEET
2
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
EL6900
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