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參數資料
| 型號： | SML2108F |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Laser Diode Adaptive Power Controller |
| 中文描述： | 激光二極管自適應功率控制器 |
| 文件頁數： | 1/21頁 |
| 文件大?。?/td> | 465K |
| 代理商： | SML2108F |
1
Characteristics subject to change without notice
2053 2.2 11/07/00
SML2108
SUMMIT
MICROELECTRONICS, Inc.
Laser Diode Adaptive Power Controller
SUMMIT MICROELECTRONICS, Inc., 2000 300 Orchard City Dr., Suite 131 Campbell, CA 95008 Phone 408-378-6461 FAX 408-378-6586 www.summitmicro.com
PRELIMINARY
!
Integrated Bias Current Monitor
"
Monitors & Measures Laser Temperature
Directly
"
Eliminates Need for External Thermistor &
Thermal Coupling Issues
"
Alarm Output on Over-temperature Condition
!
Adaptive Modulation Control (AMC)
"
Adjusts Modulation Current as a Function of
the Laser Temperature
8
×
8 Programmable Compensation Table
256 Independent Compensation Values
"
"
"
Integrated 8-Bit Modulation Control DAC
!
Flexible Biasing Architecture
"
Bias Control and Modulation Control:
0 to 10mA / 0 to 100 mA Source,
0 to 100mA Sink
!
Automatic Power Control (APC) with Integrated
10-Bit Programmable Offset
"
Automatic Initial Bias Optimization
!
Electronic Calibration Through 2-wire Interface
!
3V or 5V Operation
SIMPLIFIED APPLICATION DIAGRAM
FEATURES
The SML2108 is an adaptive power controller for laser
diodes. It is the industry's first integrated device that can
directly monitor and measure a laser diode's temperature,
and provide a variable modulation current. The
SML2108's integrated active feedback loop is used to
calibrate and control the mean and modulation power of
high speed, high power laser diodes.
Inherent manufacturing tolerances introduce variations of
performance in laser diodes. These variations, combined
with parametric changes over the laser’s extreme tem-
perature range and laser ageing, call for an efficient
temperature compensation scheme. Using an internal
digital control loop and a programmable nonvolatile com-
pensation lookup table, the SML2108 provides the most
optimum adaptive power control with a minimum number
of external components.
The SML2108 removes the need for any manual calibra-
tion of the laser control circuit, which is currently the
industry standard practice. All calibration values are
programmed through the 2-wire communication interface,
which can be controlled by most production ATE equip-
ment.
Programming of configuration, control and calibration
values by the user can be simplified with the interface
adapter and Windows GUI software obtainable from Sum-
mit Microelectronics.
The SML2108 is available in 48 lead TQFP.
DESCRIPTION
DETECT
SDA
SCL
BIASN
MODN
AUTOMON
VSS
LASER
MODULATION
DRIVER
VDD
2053 SAD 1.0
MODSET
IN+
IMOD
SML2108
LASER
DIODE
MONITOR
DIODE
Interface
VDD
VDD
IN
–
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