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.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
