1
FN7222
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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.
EL6211
3-Channel Laser Diode Driver + Oscillator
The EL6211 is a three-channel laser
diode current amplifier that provides
controlled current to a grounded laser
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
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).
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
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
shutoff is also achieved by holding the
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
IN
pin can be biased from a
current DAC or other current source.
Features
"Shrink-Small" outline package
Voltage-controlled output current source requiring one
external set resistor per channel
Current-controlled output current source
Rise time = 1.6ns
Fall time = 1.9ns
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
CMOS control signals
Applications
CD-RW applications
Writable optical drives
Laser diode current switching
Ordering Information
PART
NUMBER
PACKAGE
TAPE & REEL
PKG. DWG. #
EL6211CU
16-Pin QSOP
-
MDP0040
EL6211CU-T7
16-Pin QSOP
7"
MDP0040
EL6211CU-T13
16-Pin QSOP
13"
MDP0040
Data Sheet
June 14, 2004
Get FULL DATASHEET
2
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
EL6211
PDF 
ZIP