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SML2120N

更新时间： 2024-02-04 04:43:39
品牌 Logo 应用领域
SUMMIT 功率控制控制器
页数 文件大小 规格书
32页 1397K
描述
Programmable Adaptive Laser Power Controller with Dual Lookup Tables

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中文翻译

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SML2120N 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：,Reach Compliance Code：unknown
风险等级：5.92湿度敏感等级：1
Base Number Matches：1

SML2120N 数据手册

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SML2120  
Programmable Adaptive Laser Power Controller with Dual Lookup Tables  
1
Preliminary Information (See Last Page)  
–
–
FEATURES AND APPLICATIONS  
INTRODUCTION  
The SML2120 is an advanced, programmable laser diode  
power controller ideal for optical networking applications.  
The integrated automatic power control (APC) circuit adapts  
to variations in the laser’s power output as detected by a  
photo diode.  
Features:  
•
•
•
Integrated Automatic Power Control (APC) circuit  
100 mA bias current sink capability  
Dual low-current outputs (up to 2.5 mA) based on two  
independent 256x8 Lookup Table values  
Bias current and/or temperature monitoring capability  
Dual high/low alert registers  
•
•
•
The SML2120 drives two low current outputs derived from  
values stored in independent 256x8 Lookup Tables. The low  
current outputs are suitable for controlling the MODSET  
input of typical laser driver IC’s. The input stimulus for each  
Lookup Table can be configured as the laser temperature,  
the bias current, or an external signal. Characteristics of the  
laser’s performance over time and temperature are stored  
in the lookup tables, allowing the outputs to adapt to system  
conditions and optimize overall performance.  
Advanced lookup algorithm eliminates unnecessary  
output changes  
•
•
Flexible voltage operation;  
0 to 5V, 0 to 3.3V, or -5.2V to +3.3V  
2
I C 2-wire serial bus interface for programming  
configuration, control values, monitoring, and  
operational status - 100KHz and 400KHz  
Small 5X5 28-Pin QFN Package  
•
Programming of configuration and control values by the  
user are simplified with the I2C interface adapter  
(SMX3200) and Windows Programming software available  
from Summit Microelectronics.  
Applications:  
•
Laser power management for Telecom/Datacom  
motherboards  
•
Direct modulation and electro-absorptive modulation  
applications  
–
SIMPLIFIED APPLICATION DRAWING  
DATA+  
CAPC  
Typical  
VDD (+3.3V)  
DATA–  
APCSET  
Laser Driver  
BIASMAX  
+3.3V  
VDD  
MODSET  
OUT+  
OUT–  
25 VHI  
ILU0  
13  
12  
24  
VDD  
VBRIDGE  
VDD  
15  
NTC  
THERMISTOR 11  
2
3
4
5
A1  
A2  
LD  
BIAS 20  
SML2120  
EXT_TEMP  
ILU1  
23  
14  
SDA  
SCL  
AM#  
MPD  
MPD 18  
16  
6
7
C2  
CINT  
ALERT#  
Typical Laser  
Diode with  
Photo Diode  
and Thermistor  
C1 17  
RINT  
Figure 1. Typical SML2120 Connections to a Laser Driver and Laser Diode  
Note: This is an applications example only. Some pins, components and values are not shown.  
© SUMMIT Microelectronics, Inc. 2004 • 1717 Fox Drive • San Jose CA 95131-2312 • Phone 408 436-9890 • Fax 408 436-9897 • www.summitmicro.com  
2066 6.3 1/22/04  
1
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