EL6270C Datasheet, PDF (1/2 Pages) Elantec Semiconductor – Laser Driver with Ocillator and APC

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
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
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 1
8 VS
GND 2
7 IOUT
RAMP 3
6 LSI
RFREQ 4
5 COMP
8-Pin SOIC/MSOP-8
Complete Product Specifications
Elantec Technical Support:
North America: 1-888-352-6832 X 311
Asia: [phone]
Europe: [phone]
©2000 Elantec Semiconductor, Inc.