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參數(shù)資料
| 型號： | EL6253CU |
| 英文描述： | 3-Channel Laser Diode Driver Oscillator |
| 中文描述： | 3通道激光二極管驅(qū)動器振蕩器 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 133K |
| 代理商： | EL6253CU |
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
Ultra-Small Package Outline
Voltage-controlled output current
source to 120 mA per channel,
requiring one external set resistor
per channel
Current-controlled output current
source to 120 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%)
Current amplification = 100
Disable feature for power-up
protection and power savings
TTL/CMOS control signals
Applications
CD-RW applications
MO drives
Writable optical drives
Laser diode current switching
Ordering Information
Part No
Temp. Range
Package
Outline #
EL6253CU
0°C to +70°C
QSOP-16
MDP0041
EL6253C - Product Brief
3-Channel Laser Diode Driver + Oscillator
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General Description
The EL6253C is a high-performance three channel laser diode current
amplifier that provides controlled current to a grounded laser diode.
Amplifiers R and 2 can provide up to 120 mA per channel of DC or
pulsed current whereas amplifier 3 can provide up to 240 mA. Chan-
nels 2 and 3 must 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 by
100X to become a current source at pin IOUT.
An on-chip 500 MHz oscillator is provided to allow current modula-
tion when in the read mode. This is turned on when the OSCEN pin is
held high (floating not recommended). 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). The oscillator will also turn off whenever any of the
OUTEN pins for channels 2 or 3(the write channels) are low (see truth
table).
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 the OUTEN con-
trol pins.
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.
Connection Diagram
IINR
VCC
RAMP
ENABLE
OSCEN
IIN2
RFREQ
IIN3
OUTEN R
OUTEN2
OUTEN3
IOUT
VCC
GND
1
2
3
4
16
15
14
13
5
6
7
12
11
10
8
9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL6255 | 4-Channel Laser Diode Driver + Oscillator |
| EL6255C | 4-Channel Laser Diode Driver + Oscillator |
| EL6255CU | BARB TY CABLE TIE RoHS Compliant: Yes |
| EL6257 | 4-Channel Laser Diode Driver + Oscillator |
| EL6257C | 4-Channel Laser Diode Driver + Oscillator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL6255 | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:4-Channel Laser Diode Driver + Oscillator |
| EL6255C | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:4-Channel Laser Diode Driver + Oscillator |
| EL6255CU | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:4-Channel Laser Diode Driver + Oscillator |
| EL6257 | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:4-Channel Laser Diode Driver + Oscillator |
| EL6257C | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:4-Channel Laser Diode Driver + Oscillator |
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