EL6270C - Product Brief
EL6270C - Product Brief
Laser Driver with Ocillator and APC
Features
•
Low output noise = 4.0nA/rt-Hz
•
High-performance laser diode
driver
•
Pin compatible with EL6257
•
Voltage-controlled output current
source to 150 mA per channel,
requiring one external set resistor
per channel
•
Current-controlled output current
source to 150 mA per channel
•
Rise time = 1.0 ns
•
Fall time = 1.1 ns
•
On chip oscillator with frequency
and amplitude control by use of
external resistors to ground
•
Oscillator to 500 MHz
•
Oscillator to 100 mA pk/pk
•
Single +5V supply (±10%)
•
Disable feature for power-up
protection and power savings
•
TTL/CMOS control signals
General Description
The EL6270C is a high-performance single channel laser diode power
regulator and oscillator for a grounded cathode laser diode and photo-
diode system. The EL6270C’s APC (Automatic Power Controller) will
set the average laser diode input current for a desired average photo-
diode output current. The APC can provide up to 100 mA of DC
current.
An on-chip programable oscillator is provided to allow current modu-
lation of the output laser current. Two external resistors control of
amplitude and frequency. The Oscillator can provide up to 100mA
pk/pk.
A disable function is included which reduces supply current to less
than 5µA.
Connection Diagram
CE
GND
RAMP
RFREQ
1
2
3
4
8-Pin SOIC/MSOP-8
8
7
6
5
V
S
I
OUT
LSI
COMP
Applications
•
•
•
•
DVD-RAM high speed drives
CD-RW applications
Writable optical drives
Laser diode current switching
Ordering Information
Part No
EL6259CU
Temp. Range
0°C to +70°C
Package
QSOP-24
Outline #
MDP0040
January 31, 2000
Complete Product Specifications
Elantec Technical Support:
North America: 1-888-352-6832 X 311
Asia: +85-45-682-5820
Europe: +44-18-977-6020
©2000 Elantec Semiconductor, Inc.
EL6270C - Product
EL6270C - Product Brief
Laser Driver with Ocillator and APC
General Disclaimer
Specifications contained in this product brief are in effect as of the publication date shown. Elantec Semiconductor, Inc. reserves the right to make
changes in the circuitry or specifications contained herein at any time without notice. Elantec Semiconductor, Inc. assumes no responsibility for
the use of any circuits described herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
Elantec Semiconductor, Inc. products are not authorized for and
should not be used within Life Support Systems without the specific
written consent of Elantec Semiconductor, Inc. Life Support sys-
tems are equipment intended to support or sustain life and whose
failure to perform when properly used in accordance with instruc-
tions provided can be reasonably expected to result in significant
personal injury or death. Users contemplating application of Elantec
Semiconductor, Inc. Products in Life Support Systems are requested
to contact Elantec Semiconductor, Inc. factory headquarters to
establish suitable terms & conditions for these applications. Elantec
Semiconductor, Inc.’s warranty is limited to replacement of defec-
tive components and does not cover injury to persons or property or
other consequential damages.
January 31, 2000
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) 352-6832 (toll free)
Fax:
(408) 945-9305
European Office: 44-18-977-6020
Japan Office:
85-45-682-5820
2
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