EL6241C - Product Brief
EL6241C - Product Brief
Dual Laser Driver with APC Amp
Features
• 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, 100mA
P-P
oscillator
• Write rise/fall times = 0.8ns
• Single +5V supply
• Auto-oscillator on-off with
OUTEN signals
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/µs, the
I/V amplifier can normally settle to 1% within 30ns.
Applications
•
•
•
•
Combo CD-RW + DVD-ROM
CD-RW to 16X
CD-R to 32X
Writable optical disk drives
Connection Diagrams
1 VOUT
PDIN 24
23 VREF
21 PDIN
24 IINR
20 VCC
19 VCC
18 IOUT1
17 GND
Thermal Pad
16 GND
15 RAMP1
14 RAMP2
VDD 23
VDD 22
IOUT1 21
GND 20
GND 19
RAMP1 18
RAMP2 17
ENABLE 16
OSCEN 15
IOUT2 14
VDD 13
IIN2 1
RF1 2
IIN3 3
GND 4
RF2 5
WEN2 6
CD 7
VCC 10
IOUT2 11
OSCEN 12
WEN3 8
NC 9
22 VOUT
Ordering Information
Part No
EL6241CU
EL6241CL
Temp Range
-40°C to+ 85°C
-40°C to+ 85°C
Package
24-Pin QSOP
24-Pin LPP
Outline #
MDP0040
MDP0046
2 VREF
3 IINR
4 IIN2
5 RF1
6 IIN3
7 GND
8 RF2
9 WEN2
10 CD
11 WEN3
12 NC
October 25, 2001
13 ENABLE
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.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
