Elantec EL6280CU Dual laser driver with apc amp Datasheet

Dual Laser Driver with APC Amp
Features
General Description
• Read + 3Write 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
• 200X gain, 200mA write channel
plus two 100X gain, 100mA write
channels
• 500MHz, 100mAP-P Oscillator
• Write Rise/Fall times = 0.8ns
• Single +5V supply
The EL6280C is a combination read + 3 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.
Applications
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 and off by the OSCEN
line. 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/µs, the
I/V amplifier can normally settle to 1% within 30ns.
2 VREF
VDD 23
3 IINR
VDD 22
4 IIN2
IOUT1 21
5 RF1
GND 20
6 IIN3
GND 19
7 IIN4
RAMP1 18
8 RF2
RAMP2 17
9 WEN2
ENABLE 16
10 CD
IIN2 1
19 VCC
RF1 2
18 IOUT1
IIN3 3
17 GND
IIN4 4
16 GND
RF2 5
15 RAMP1
WEN2 6
14 RAMP2
CD 7
13 ENABLE
OSCEN 15
11 WEN3
IOUT2 14
12 WEN4
VDD 13
20 VCC
PDIN 24
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
1 VOUT
OSCEN 12
MDP0046
21 PDIN
LPP-24
IOUT2 11
MDP0040
22 VOUT
Outline #
QSOP-24
VCC 10
Package
0°C to +70°C
23 VREF
Temp. Range
WEN4 9
Part No.
EL6280CU
24 IINR
Connection Diagram
Ordering Information
EL6280CL
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. Write channel 2 has 200mA output
capability with an 200X gain amplifier.
WEN3 8
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EL6280C - Product Brief
EL6280C - Product Brief
EL6280C - Product Brief
EL6280C - 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.
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