el6288c ETC-unknow, el6288c Datasheet
el6288c
Manufacturer Part Number
el6288c
Description
3-channel Laser Diode Driver W/oscillator Amplifier
Manufacturer
ETC-unknow
Datasheet
1.EL6288C.pdf
(2 pages)
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
© 2001 Elantec Semiconductor, Inc.
Features
Applications
Ordering Information
• Shrink-Small Package Outline
• Voltage-controlled output current
• Current-controlled output current
• Rise time = 0.8ns
• Fall time = 0.8ns
• On chip oscillator with frequency
• Oscillator to 500MHz
• Oscillator to 100mA pk/pk
• Single +5V supply (±10%)
• Disable feature for power-up
• Fast Settling APC Amplifier
• CD-RW applications
• Writable optical drives
• Laser diode current switching
EL6288CU
Part No
source, requiring one external set
resistor per channel
source
and amplitude control by use of
external resistors to ground
protection and power savings
Temp. Range
0°C to +70°C
QSOP-16
Package
MDP0041
Outline #
EL6288C - Product Brief
3-Channel Laser Diode Driver w/Oscillator & APC Amplifier
General Description
The EL6288C is a high-performance three channel laser driver that
provides controlled current to a grounded laser diode. Channels 2 and
3 should be used as the write channels, with switching speeds of
approximately one nanosecond rise/fall time. All three channels are
summed together at the I
level 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
(virtually ground). The current seen at this pin is then amplified to
become a current source at pin I
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 RFREQ and RAMP
(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 addi-
tional laser diode protection is provided since the OUTEN input will
float high when open. Complete I
holding the ENABLE pin low, which will override all other control
pins.
The EL6288C also includes a fast settling APC amplifier designed to
interface directly with the front end monitor diode and the sample-
and-hold amplifier for read and write power control. Its 100MHz
bandwidth and 30ns settling time enable up to 16X CD-RW design.
Connection Diagram
OUT
1
2
3
4
5
6
7
8
VOUT
VREF
IINR
IIN2
IIN3
RFREQ
OUTEN3
OUTEN2
output, allowing the user to create multi-
OUT
OUT
.
ENABLE
OSCEN
RAMP
PDIN
IOUT
GND
VCC
VCC
shut-off is also achieved by
16
15
14
13
12
11
10
9
IN
pin
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el6288c Summary of contents
Page 1
... ENABLE pin low, which will override all other control pins. The EL6288C also includes a fast settling APC amplifier designed to interface directly with the front end monitor diode and the sample- and-hold amplifier for read and write power control. Its 100MHz bandwidth and 30ns settling time enable up to 16X CD-RW design ...
Page 2
... EL6288C - Product Brief 3-Channel Laser Diode Driver w/Oscillator & APC Amplifier General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir- cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement ...