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SML2120 BLOCK DIAGRAM (PDF pg 3): Summit Microelectronics, Inc.
SML2120 BLOCK DIAGRAM (PDF pg 3)
SML2120 PINOUT (PDF pg 4): Summit Microelectronics, Inc.
SML2120 PINOUT  (PDF pg 4)
   

SML2120 Programmable Adaptive Laser Power Controller with Dual Lookup Tables

  Preliminary Information1  


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

Advanced lookup algorithm eliminates unnecessary output changes

Flexible voltage operation;
    0 to 5V, 0 to 3.3V, or -5.2V to +3.3V

I2C 2-wire serial bus interface for programming configuration, control values, monitoring, and operational status - 100KHz and 400KHz

Small 5X5 28-Pin QFN Package


    

APPLICATIONS

Laser power management for Telecom/Datacom motherboards

Direct modulation and electro-absorptive modulation 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.

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.

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.
[continued in the PDF]
   


    

ORDERING INFORMATION
SML2120 Ordering Information - Summit Microelectronics, Inc.


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NOTE 1 - This is a Preliminary Information data sheet that describes a Summit product currently in pre-production with limited characterization.

SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission.

SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances.

Revision 6.3 - This document supercedes all previous revisions. Please check the Summit Microelectronics, Inc. web site at www.summitmicro.com for data sheet updates.

I2C is a trademark of Philips Corporation.

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