EL6211
®
Data Sheet
June 14, 2004
FN7222
3-Channel Laser Diode Driver + Oscillator
Features
The EL6211 is a three-channel laser
diode current amplifier that provides
controlled current to a grounded laser
• “Shrink-Small” outline package
• Voltage-controlled output current source requiring one
external set resistor per channel
diode. Channels 2 and 3 should be used as the write
channels, with switching speeds of less than two
nanoseconds rise/fall time. All three channels are summed
• Current-controlled output current source
• Rise time = 1.6ns
together at the I
output, allowing the user to create
OUT
• Fall time = 1.9ns
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
• On chip oscillator with frequency and amplitude control by
use of external resistors to ground
the voltage into a current at the I pin (virtually ground).
IN
• Oscillator to 500MHz
An on-chip 500MHz oscillator is provided to allow output
current modulation when in any mode. This is turned on
when the OSCEN pin is held high. Complete control of
amplitude and frequency is set by two external resistors
• Oscillator to 100mA
PK/PK
• Single +5V supply (±10%)
• Disable feature for power-up protection and power savings
• CMOS control signals
connected to ground at pins R
and R
(see graphs
AMP
FREQ
in this data sheet for further explanation).
Applications
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.
• CD-RW applications
• Writable optical drives
• Laser diode current switching
Complete I
shutoff is also achieved by holding the
OUT
ENABLE pin low, which will override the OUTEN control
pins.
The external resistors allow the user to accurately and
independently set each amplifier transconductance by
applying a voltage to each resistor, without restriction on the
voltage range, thus ensuring broad voltage DAC
compatibility. Alternatively, the I pin can be biased from a
IN
current DAC or other current source.
Ordering Information
PART
NUMBER
PACKAGE
16-Pin QSOP
16-Pin QSOP
TAPE & REEL PKG. DWG. #
Get FULL DATASHEET
EL6211CU
-
MDP0040
MDP0040
MDP0040
EL6211CU-T7
7”
EL6211CU-T13 16-Pin QSOP
13”
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
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