EL6286C [ELANTEC]

4-Ch Laser Diode Driver + Oscillator; 4通道激光二极管驱动器+振荡器
EL6286C
型号: EL6286C
厂家: ELANTEC SEMICONDUCTOR    ELANTEC SEMICONDUCTOR
描述:

4-Ch Laser Diode Driver + Oscillator
4通道激光二极管驱动器+振荡器

振荡器 驱动器 二极管 激光二极管
文件: 总2页 (文件大小:155K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
EL6286C - Product Brief  
4-Ch Laser Diode Driver + Oscillator  
Features  
General Description  
• “Shrink-Small” Outline Package  
The EL6286C is a four channel laser diode current amplifier that pro-  
vides controlled current to a grounded laser diode. Channels 2, 3, and  
4 must be used as the write channels, with switching speeds of approx-  
imately one nanosecond rise/fall time. All four channels are summed  
together at the IOUT 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 IIN pin (virtu-  
ally ground). The current seen at this pin is then amplified to become a  
• Voltage-controlled output current  
source requiring one external set  
resistor per channel  
• Current-controlled output current  
source  
• Rise time = 0.8ns  
• Fall time = 0.8ns  
• 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  
current source at pin IOUT  
.
An on-chip 500MHz oscillator is provided to allow current modula-  
tion 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 exter-  
nal 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 IOUT shutoff is also achieved by hold-  
ing the ENABLE pin low, which will override all other control pins.  
Applications  
• CD-RW applications  
• Writable optical drives  
• Laser diode current switching  
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 IIN pin can be biased  
from a current DAC or other current source.  
Ordering Information  
Part No  
Temp. Range  
Package  
Outline #  
EL6286CU  
0°C to +70°C  
QSOP-24  
MDP0040  
Connection Diagram  
GND  
1
2
3
4
5
6
7
8
9
24 GND  
23 VCC  
IINR  
GND  
22 VCC  
IIN2  
21 IOUT  
20 IOUT  
19 GND  
18 RAMP  
17 ENABLE  
16 OSCEN  
15 VCC  
RFREQ  
IIN3  
IIN4  
OUTENR  
OUTEN2  
OUTEN3 10  
OUTEN4 11  
GND 12  
14 VCC  
13 GND  
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.  
EL6286C - Product Brief  
4-Ch Laser Diode Driver + Oscillator  
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.  
WARNING - Life Support Policy  
Elantec, Inc. products are not authorized for and should not be used  
within Life Support Systems without the specific written consent of  
Elantec, Inc. Life Support systems are equipment intended to sup-  
port or sustain life and whose failure to perform when properly used  
in accordance with instructions provided can be reasonably  
Elantec Semiconductor, Inc.  
675 Trade Zone Blvd.  
Milpitas, CA 95035  
Telephone: (408) 945-1323  
(888) ELANTEC  
expected to result in significant personal injury or death. Users con-  
templating application of Elantec, Inc. Products in Life Support  
Systems are requested to contact Elantec, Inc. factory headquarters  
to establish suitable terms & conditions for these applications. Elan-  
tec, Inc.’s warranty is limited to replacement of defective  
components and does not cover injury to persons or property or  
other consequential damages.  
Fax:  
(408) 945-9305  
European Office: +44-118-977-6020  
Japan Technical Center: +81-45-682-5820  
Printed in U.S.A.  
2

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