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FN7245
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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EL6244
3-Channel Laser Diode Driver w/Oscillator
& APC Amplifier
The EL6244 is a high-performance
three channel laser driver that provides
controlled current to a grounded laser
diode. Channels 2 and 3 should be used as the write
channels, with switching speeds of approximately one
nanosecond rise/fall time. All three channels are summed
together at the I
OUT
output, allowing the user to create
multilevel waveforms in order to optimize laser diode
performance. The level of the output current is set by an
analog voltage applied to an external resistor which converts
the voltage into a current at the I
IN
pin (virtually ground). The
current seen at this pin is then amplified to become a current
source at pin I
OUT
.
An on-chip 500MHz oscillator is provided to allow output
current modulation when in any mode. This is turned on only
when the OSCEN and OUTEN pins are held high. Complete
control of amplitude and frequency is set by two external
resistors connected to ground at pins R
FREQ
and R
AMP
(see graphs in this data sheet for further explanation).
Output current pulses are enabled when an `L' signal is
applied to the OUTEN pin. No output current flows when
OUTEN is `H', and additional laser diode protection is
provided since the OUTEN input will float high when open.
Complete I
OUT
shut-off is also achieved by holding the
ENABLE pin low, which will override all other control pins.
The EL6244 also includes a fast settling APC amplifier
designed to interface directly with the front end monitor
diode and the sample-and-hold amplifier for read and write
power control. Its 100MHz bandwidth and 30ns settling time
enable up to 16X CD-RW design.
Features
"Shrink-Small" Outline Package
Voltage-controlled output current source, requiring one
external set resistor per channel
Auto oscillator on-off with OUTEN signals
Rise time = 0.8ns
Fall time = 0.8ns
On chip oscillator with frequency and amplitude control by
use of external resistors to ground
Oscillator to 500MHz
Oscillator to 100mA
PK/PK
Single +5V supply (10%)
Disable feature for power-up protection and power savings
Fast Settling APC Amplifier
Pb-free Available as an Option
Applications
CD-RW applications
Writable optical drives
Laser diode current switching
Ordering Information
PART
NUMBER
PACKAGE
TAPE & REEL
PKG. DWG. #
EL6244CU
16-Pin QSOP
-
MDP0040
EL6244CU-T7
16-Pin QSOP
7"
MDP0040
EL6244CU-T13
16-Pin QSOP
13"
MDP0040
EL6244CUZ
(See Note)
16-Pin QSOP
(Pb-free)
-
MDP0040
EL6244CUZ-
T7 (See Note)
16-Pin QSOP
(Pb-free)
7"
MDP0040
EL6244CUZ-
T13 (See Note)
16-Pin QSOP
(Pb-free)
13"
MDP0040
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which is compatible with both SnPb and Pb-free soldering
operations. Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J Std-020B.
Data Sheet
June 17, 2004
Get FULL DATASHEET
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All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
EL6244
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