EL6280C - Product Brief
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
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.
• 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 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.
Applications
• Combo CD-RW + DVD-ROM
• CD-RW to 16X
• CD-R to 32X
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.
• Writable Optical Disk Drives
Connection Diagram
Ordering Information
Part No.
EL6280CU
EL6280CL
Temp. Range
Package
QSOP-24
LPP-24
Outline #
MDP0040
MDP0046
1
2
3
4
5
6
7
8
9
VOUT
VREF
IINR
IIN2
PDIN 24
0°C to +70°C
VDD 23
VDD 22
IIN2
RF1
1
2
3
4
5
6
7
19 VCC
IOUT1 21
GND 20
18 IOUT1
17 GND
RF1
IIN3
IIN4
RF2
IIN3
GND 19
16 GND
IIN4
RAMP1 18
RAMP2 17
ENABLE 16
OSCEN 15
IOUT2 14
VDD 13
15 RAMP1
14 RAMP2
13 ENABLE
RF2
WEN2
CD
WEN2
10 CD
11 WEN3
12 WEN4
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.