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参数资料
| 型号： | EL6248CU |
| 英文描述： | 3-Channel Laser Diode Driver w/Oscillator & APC Amplifier |
| 中文描述： | 3通道激光二极管驱动器瓦特/振荡器 |
| 文件页数： | 1/2页 |
| 文件大小： | 136K |
| 代理商： | EL6248CU |
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.
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Features
“Shrink-Small” Outline Package
Voltage-controlled output current
source requiring one external set
resistor per channel
Current-controlled output current
source
CH2 to 250mA max
CH3 to 150mA max
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
Auto-oscillator for read
Single +5V supply (±10%)
Disable feature for power-up
protection and power savings
Fast Settling APC Amplifier
Applications
CD-RW applications
Writable optical drives
Laser diode current switching
Ordering Information
Part No
Temp. Range
Package
Outline #
EL6248CU
0°C to +70°C
24-Pin QSOP
MDP0040
General Description
The EL6248C 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 IOUT output, allowing the user to create multi-
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 IIN pin
(virtually ground). The current seen at this pin is then amplified to
become a current source at pin IOUT.
An on-chip 500MHz oscillator is provided to allow output current
modulation when in any mode. This is turned on when the OSCEN
and OUTEN pins are 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 IOUT shut-off is also achieved by
holding the ENABLE pin low, which will override all other control
pins.
The EL6248C 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.
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VOUT
PDIN
VREF
VCC
IINR
VCC
IIN2
IOUT
RFREQ
IOUT
IIN3
GND
OUTENR
RAMP
OUTEN3
ENABLE
OUTEN2
OSCEN
GND
VCC
NC
GND
NC
Connection Diagram
EL6248C - Product Brief
3-Channel Laser Diode Driver w/Oscillator & APC Amplifier
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相关PDF资料 |
PDF描述 |
|---|---|
| EL6249C | 4-Ch Laser Diode Driver Oscillator |
| EL6249CU | 4-Ch Laser Diode Driver Oscillator |
| EL6250C | Split Supply Laser Driver and Oscillator |
| EL6250CU | Split Supply Laser Driver and Oscillator |
| EL6252C | 2-Channel laser diode Driver + Oscillator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL6249C | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:4-Ch Laser Diode Driver Oscillator |
| EL6249CU | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:4-Ch Laser Diode Driver Oscillator |
| EL6250C | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:Split Supply Laser Driver and Oscillator |
| EL6250CU | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:Split Supply Laser Driver and Oscillator |
| EL6252C | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:2-Channel laser diode Driver + Oscillator |
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