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ADN2530YCPZ-WP Datasheet(PDF) 1 Page - Analog Devices |
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ADN2530YCPZ-WP Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page 11.3 Gbps, Active Back-Termination, Differential VCSEL Driver ADN2530 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES Up to 11.3 Gbps operation −40°C to +100°C operation Very low power: ISUPPLY = 65 mA Typical 26 ps rise/fall times Full back-termination of output transmission lines Crosspoint adjust function PECL-/CML-compatible data inputs Bias current range: 2 mA to 25 mA Differential modulation current range: 2.2 mA to 23 mA Automatic laser shutdown (ALS) 3.3 V operation Compact 3 mm × 3 mm LFCSP Voltage-input control for bias and modulation currents XFP-compliant bias current monitor APPLICATIONS 10 Gb Ethernet optical transceivers 10G-BASE-LRM optical transceivers 8× and 10× Fibre Channel optical transceivers XFP/X2/XENPAK/MSA 300 optical modules SONET OC-192/SDH STM-64 optical transceivers GENERAL DESCRIPTION The ADN2530 laser diode driver is designed for direct modula- tion of packaged VCSELs with a differential resistance ranging from 35 Ω to 140 Ω. The active back-termination technique provides excellent matching with the output transmission lines while reducing the power dissipation in the output stage. The back-termination in the ADN2530 absorbs signal reflections from the TOSA end of the output transmission lines, enabling excellent optical eye quality to be achieved even when the TOSA end of the output transmission lines is significantly misterminated. The small package provides the optimum solution for compact modules where laser diodes are packaged in low pin count optical subassemblies. The modulation and bias currents are programmable via the MSET and BSET control pins. By driving these pins with control voltages, the user has the flexibility to implement various average power and extinction ratio control schemes, including closed-loop control and look-up tables. The eye crosspoint in the output eye diagram is adjustable via the crosspoint adjust (CPA) control voltage input. The automatic laser shutdown (ALS) feature allows the user to turn on/off the bias and modulation currents by driving the ALS pin with the proper logic levels. The product is available in a space-saving 3 mm × 3 mm LFCSP specified from −40°C to +100°C. FUNCTIONAL BLOCK DIAGRAM 100Ω 200Ω 800Ω 200Ω 10Ω VCC DATAP DATAN MSET GND BSET IBMON IBIAS IMODP IMODN ADN2530 VCC ALS GND VCC VCC 50Ω 50Ω CPA 200Ω 800Ω CROSS POINT ADJUST IMOD Figure 1. |
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