Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a "controlled document". Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
2001 Elantec Semiconductor, Inc.
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General Description
The EL6241C is a combination read + 2 write level laser driver and IV
amplifier, with an extra read + oscillator ROM channel for use in dual-
laser `combo' drivers. A separate (amplitude and frequency) oscillator
modulates the selected output for laser noise reduction during read or
write. All these functions are provided in a 24-lead QSOP package.
The CD pin, when high, selects the CD (write) laser. Positive current
supplied to the IIN lines, through a user selected resistor, allow the full
scale range of each amplifier to be matched to the full scale range of
the users control DACs. When the write laser is selected, and the
WEN pins are switched low, the respective current is summed to the
output with 1ns rise and fall times.
The 100mA
P-P
(max) oscillator is switched on when both OSCEN and
OUTEN pins are high. The CD line allows the oscillator to operate at
different amplitudes and frequencies for each laser.
The entire chip is powered down when ENABLE is low. The user can
define the gain of the I/V amplifier. With a slew rate of 200V/s, the
I/V amplifier can normally settle to 1% within 30ns.
Connection Diagrams
1
2
3
4
16
15
14
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5
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9
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20
19
18
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24
23
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VOUT
VREF
IINR
IIN2
RF1
IIN3
GND
RF2
WEN2
CD
WEN3
NC
PDIN
VDD
VDD
IOUT1
GND
GND
RAMP1
RAMP2
ENABLE
OSCEN
IOUT2
VDD
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16
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Thermal Pad
IIN2
RF1
IIN3
GND
RF2
WEN2
CD
VCC
IOUT1
GND
GND
RAMP1
RAMP2
ENABLE
I
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N
R
V
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Features
Read + 2 write channel laser driver
with oscillator and fast I/V
amplifier plus a separate ROM
laser driver with oscillator
200V/s I/V amplifier
100X gain, 100mA low noise read
channel
250X gain, 250mA and 150X gain,
150mA write channels
500MHz, 100mA
P-P
oscillator
Write rise/fall times = 0.8ns
Single +5V supply
Auto-oscillator on-off with
OUTEN signals
Applications
Combo CD-RW + DVD-ROM
CD-RW to 16X
CD-R to 32X
Writable optical disk drives
Ordering Information
Part No
Temp Range
Package
Outline #
EL6241CU
-40C to+ 85C
24-Pin QSOP
MDP0040
EL6241CL
-40C to+ 85C
24-Pin LPP
MDP0046
EL6241C - Product Brief
Dual Laser Driver with APC Amp
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EL6241C - Product Brief
Dual Laser Driver with APC Amp
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General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir-
cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described
herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
Elantec, Inc. products are not authorized for and should not be used
within Life Support Systems without the specific written consent of
Elantec, Inc. Life Support systems are equipment intended to sup-
port or sustain life and whose failure to perform when properly used
in accordance with instructions provided can be reasonably
expected to result in significant personal injury or death. Users con-
templating application of Elantec, Inc. Products in Life Support
Systems are requested to contact Elantec, Inc. factory headquarters
to establish suitable terms & conditions for these applications. Elan-
tec, Inc.'s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
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Printed in U.S.A.
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) ELANTEC
Fax:
(408) 945-9305
European Office: +44-118-977-6020
Japan Technical Center: +81-45-682-5820
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