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参数资料
| 型号： | EL6257CU |
| 英文描述： | 4-Channel Laser Diode Driver + Oscillator |
| 中文描述： | 4通道激光二极管驱动器振荡器 |
| 文件页数： | 1/2页 |
| 文件大小： | 134K |
| 代理商： | EL6257CU |
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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General Description
The EL6257C is a high-performance four channel laser diode current
amplifier that provides controlled current to a grounded laser diode.
The four amplifiers can provide up to 150 mA per channel of DC or
pulsed current. Channels 2, 3, and 4 must be used as the write chan-
nels, with switching speeds of approximately one nanosecond rise/fall
time. All four channels are summed together at the IOUT output, allow-
ing 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 (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, 3, and 4 (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
1
2
3
4
16
15
14
13
5
6
7
12
11
9
8
10
20
19
18
17
24
23
22
21
IINR
GND
VCC
IOUT
RAMP
ENABLE
OSCEN
IIN2
RFREQ
IIN3
IIN4
OUTEN
OUTEN2
OUTEN3
OUTEN4
GND
IOUT
GND
VCC
GND
Features
High-performance laser diode
driver
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%)
Current amplification = 100
Disable feature for power-up
protection and power savings
TTL/CMOS control signals
Applications
DVD drives
CD-RW applications
Writable optical drives
Laser diode current switching
Ordering Information
Part No
Temp. Range
Package
Outline #
EL6257CU
0°C to +70°C
QSOP-24
MDP0040
EL6257C - Product Brief
4-Channel Laser Diode Driver + Oscillator
Ju
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相关PDF资料 |
PDF描述 |
|---|---|
| EL6258C | 3-Channel Laser Driver + Oscillator + APC Amplifier |
| EL6258CU | 3-Channel Laser Driver + Oscillator + APC Amplifier |
| EL6259CU | Laser Driver with Ocillator and APC |
| EL6259 | Low Noise 4-Channel Laser Diode Driver + Oscillator |
| EL6259C | Low Noise 4-Channel Laser Diode Driver + Oscillator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| E-L6258 | 功能描述:马达/运动/点火控制器和驱动器 PWM CTRL Motor DRV 1.2A 12V to 34V BCD RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| EL6258C | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:3-Channel Laser Driver + Oscillator + APC Amplifier |
| EL6258CU | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:3-Channel Laser Driver + Oscillator + APC Amplifier |
| EL6258E | 制造商:STMicroelectronics 功能描述:DMOS Dual Full Bridge Driver 36-Pin PowerSO Tube |
| E-L6258E | 功能描述:马达/运动/点火控制器和驱动器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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