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ADN2843

Part Number	ADN2843
Manufacturer	Analog Devices
Description	10.709 Gbps Laser Diode Driver Chipset
Published	Mar 23, 2005
Detailed Description	a FEATURES Data Rates from 9.952 Gbps to 10.709 Gbps Typical Rise/Fall Time 25 ps/23 ps Bias Current Range 3 mA to 80 mA...
Datasheet	ADN2843 PDF File

Overview

a FEATURES Data Rates from 9.
952 Gbps to 10.
709 Gbps Typical Rise/Fall Time 25 ps/23 ps Bias Current Range 3 mA to 80 mA Modulation Current Range 5 mA to 80 mA Monitor Photodiode Current 50 ␮A to 1200 ␮A Closed-Loop Control of Both Average Optical Power and Extinction Ratio Laser Fail and Laser Degrade Alarms Automatic Laser Shutdown, ALS Dual MPD Functionality for Wavelength Control CML Data Inputs 50 ⍀ Internal Data Terminations 3.
3 V Single-Supply Operation Driver Supplied in Dice Format APPLICATIONS SONET OC-192, SDH STM-64 Supports 10.
667 Gbps and 10.
709 Gbps FEC Rates 10 Gb Ethernet IEEE802.
3ae 10.
709 Gbps Laser Diode Driver Chipset ADN2843 GENERAL DESCRIPTION The ADN2943 chipset consists of two components, the ADN2845 and the ADN2844.
The ADN2845 is a 10.
709 Gbps laser diode driver.
The ADN2845 eliminates the need to ac couple since it can deliver 80 mA of modulation while dc coupled to the laser diode.
It is intended to be copackaged with the laser to minimize bond lengths, which improves performance of the optical transmitter.
For transmission line applications, contact HSN Application Group at fiberoptic.
ic@analog.
com.
The ADN2844 offers a unique control loop algorithm and provides dual loop control of both average power and extinction ratio.
Programmable alarms are provided for laser fail (end of life) and laser degrade (impending fail).
Both the ADN2844 and the ADN2845 are available as bare die.
The ADN2844 is also available in 5 mm ¥ 5 mm 32-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM IMPDMON2 DEGRADE IMPDMON IMMON IBMON VCC MPD VCC FAIL VCC VCC VCC LD ADN2844 ADN2843 ADN2845 IMPD IMODP GND IMPD2 CONTROL IMOD_CTRL D_IMOD * GND ERSET * GND ERCAP GND IDTONE GND *ADN2850 OR ADN2860 OPTICAL SUPERVISOR PAVCAP ASET ALS GND IBIAS_CTRL IBIAS GND DATAN IMODN DATAP MODE ALS PSET REV.
0 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 infringe...

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