EL6244 Datasheet, PDF (1/2 Pages) Intersil Corporation – 3-Channel Laser Diode Driver w/Oscillator & APC Amplifier

®
Data Sheet
June 17, 2004
EL6244
FN7245
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.
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 16-Pin QSOP
-
(See Note)
(Pb-free)
MDP0040
EL6244CUZ- 16-Pin QSOP
7”
T7 (See Note)
(Pb-free)
MDP0040
EL6244CUZ- 16-Pin QSOP
13”
T13 (See Note) (Pb-free)
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.
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
Get FULL DATASHEET
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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