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EL6280C Fiches technique(PDF) 1 Page - Elantec Semiconductor

No de pièce EL6280C
Description  Dual Laser Driver with APC Amp
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Fabricant  ELANTEC [Elantec Semiconductor]
Site Internet  http://www.elantec.com
Logo ELANTEC - Elantec Semiconductor

EL6280C Fiches technique(HTML) 1 Page - Elantec Semiconductor

  EL6280C Datasheet HTML 1Page - Elantec Semiconductor EL6280C Datasheet HTML 2Page - Elantec Semiconductor  
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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.
General Description
The EL6280C is a combination read + 3 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) oscilla-
tor 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. Write channel 2 has 200mA output
capability with an 200X gain amplifier.
The 100mAP-P (max) oscillator is switched on and off by the OSCEN
line. The CD line allows the oscillator to operate at different ampli-
tudes 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.
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9
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24
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Connection Diagram
VREF
IINR
VOUT
IIN2
RF1
IIN3
IIN4
RF2
WEN2
CD
WEN3
WEN4
PDIN
VDD
VDD
IOUT1
GND
GND
RAMP1
RAMP2
ENABLE
OSCEN
IOUT2
VDD
6
5
4
3
14
15
16
17
IIN2
RF1
IIN3
IIN4
VCC
IOUT1
GND
GND
7
2
13
18
RAMP1
RF2
1
19
WEN2
CD
RAMP2
ENABLE
Features
• 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
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 #
EL6280CU
0°C to +70°C
QSOP-24
MDP0040
EL6280CL
LPP-24
MDP0046
EL6280C - Product Brief
Dual Laser Driver with APC Amp


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