ADN2526ACPZ Analog Devices

11.3 Gbps Active Back-Termination, Differential Laser Diode Driver Data Sheet ADN2526 FEATURES GENERAL DESCRIPTION 3.3 V operation The ADN2526 laser diode driver is designed for direct modula- Up to 11.3 Gbps operation tion of packaged laser diodes that have a differential resistance Typical 24 ps rise/fall times ranging from 5 to 50 . The active back-termination in the Full back-termination of output transmission lines ADN2526 absorbs signal reflections from the TOSA end of the Drives TOSAs with resistances ranging from 5 to 50 output transmission lines, enabling excellent optical eye quality to Bias current range: 10 mA to 100 mA be achieved even when the TOSA end of the output transmission Differential modulation current range: 10 mA to 80 mA lines is significantly misterminated. ADN2526 is an SFP+ MSA- Voltage input control for bias and modulation currents compliant device, and its small package and enhanced ESD Data inputs sensitivity: 150 mV p-p diff protection provide the optimum solution for compact modules Automatic laser shutdown (ALS) where laser diodes are packaged in low pin-count optical Cross point adjustment (CPA) subassemblies. XFP-compliant bias current monitor The modulation and bias currents are programmable via the SFP+ MSA compliant MSET and BSET control pins. By driving these pins with control Optical evaluation board available voltages, the user has the flexibility to implement various Compact 3 mm 3 mm LFCSP average optical power and extinction ratio control schemes, including closed-loop or look-up table control. The automatic APPLICATIONS laser shutdown (ALS) feature allows the user to turn on/off the bias and modulation currents by driving the ALS pin with a SONET OC-192 and SDH STM-64 optical transceivers LVTTL logic source. 10 Gb Fibre Channel transceivers 10 Gb Ethernet optical transceivers The product is available in a space-saving 3 mm 3 mm LFCSP SFP+/XFP/X2/XENPAK/XPAK/MSA 300 optical modules specified from 40C to +85C. FUNCTIONAL BLOCK DIAGRAM VCC CPA ALS VCC ADN2526 VCC IMODP 50 50 IMOD 50 GND IMODN VCC DATAP CROSS POINT ADJUST DATAN IBMON IBIAS 800 800 200 200 200 2 MSET VEE BSET Figure 1. Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20092017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 07511-001ADN2526 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Automatic Laser Shutdown (ALS) ........................................... 11 Applications ....................................................................................... 1 Modulation Current ................................................................... 11 General Description ......................................................................... 1 Load Mistermination ................................................................. 12 Functional Block Diagram .............................................................. 1 Crosspoint Adjustment .............................................................. 13 Revision History ............................................................................... 2 Power Sequence .......................................................................... 13 Specifications ..................................................................................... 3 Power Consumption .................................................................. 13 Thermal Specifications ................................................................ 4 Applications Information .............................................................. 14 Absolute Maximum Ratings ............................................................ 6 Typical Application Circuit ....................................................... 14 ESD Caution .................................................................................. 6 Layout Guidelines....................................................................... 14 Pin Configuration and Function Descriptions ............................. 7 Design Example .......................................................................... 15 Typical Performance Characteristics ............................................. 8 Outline Dimensions ....................................................................... 16 Theory of Operation ...................................................................... 10 Ordering Guide .......................................................................... 16 Input Stage ................................................................................... 10 Bias Current ................................................................................ 10 REVISION HISTORY 5/2017Rev. B to Rev. C Changed CP-16-27 to CP-16-22 .................................. Throughout Updated Outline Dimensions ....................................................... 16 Changes to Ordering Guide .......................................................... 16 10/2013Rev. A to Rev. B Updated Outline Dimensions ....................................................... 16 Changes to Ordering Guide .......................................................... 16 8/2009Rev. 0 to Rev. A Changes to Maximum Value (Table 2) ................................. 4 J-PAD Changes to Figure 5 and Figure 6 ................................................... 8 1/2009Revision 0: Initial Version Rev. C Page 2 of 16