ELANTEC EL6241CL

Dual Laser Driver with APC Amp
Features
General Description
• Read + 2 write channel laser driver
with oscillator and fast I/V
amplifier plus a separate ROM
laser driver with oscillator
• 200V/µs I/V amplifier
• 100X gain, 100mA low noise read
channel
• 250X gain, 250mA and 150X gain,
150mA write channels
• 500MHz, 100mAP-P oscillator
• Write rise/fall times = 0.8ns
• Single +5V supply
• Auto-oscillator on-off with
OUTEN signals
The EL6241C is a combination read + 2 write level laser driver and IV
amplifier, with an extra read + oscillator ROM channel for use in duallaser ‘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.
-40°C to+ 85°C
24-Pin LPP
MDP0046
3 IINR
VDD 22
4 IIN2
IOUT1 21
5 RF1
GND 20
6 IIN3
GND 19
7 GND
RAMP1 18
8 RF2
RAMP2 17
9 WEN2
ENABLE 16
10 CD
11 WEN3
12 NC
OSCEN 15
IOUT2 14
IIN2 1
19 VCC
RF1 2
18 IOUT1
IIN3 3
17 GND
GND 4
Thermal Pad
16 GND
RF2 5
15 RAMP1
WEN2 6
14 RAMP2
CD 7
13 ENABLE
VDD 13
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.
October 25, 2001
VDD 23
20 VCC
EL6241CL
2 VREF
OSCEN 12
MDP0040
21 PDIN
Outline #
24-Pin QSOP
IOUT2 11
Package
-40°C to+ 85°C
PDIN 24
22 VOUT
Part No
1 VOUT
VCC 10
Temp Range
EL6241CU
Connection Diagrams
23 VREF
Ordering Information
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/µs, the
I/V amplifier can normally settle to 1% within 30ns.
NC 9
Combo CD-RW + DVD-ROM
CD-RW to 16X
CD-R to 32X
Writable optical disk drives
The 100mAP-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.
24 IINR
•
•
•
•
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.
WEN3 8
Applications
EL6241C - Product Brief
EL6241C - Product Brief
EL6241C - Product Brief
EL6241C - Product Brief
Dual Laser Driver with APC Amp
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 circuitry 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.
October 25, 2001
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 support 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 contemplating 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. Elantec, Inc.’s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
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
2
Printed in U.S.A.