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ADN2848 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADN2848
Description  3 V Dual-Loop 50 Mbps to 1.25 Gbps Laser Diode Driver
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADN2848 Datasheet(HTML) 1 Page - Analog Devices

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ADN2848
3 V Dual-Loop 50 Mbps to 1.25 Gbps
Laser Diode Driver
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 rights of third parties that
may result from its use. No 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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.
FUNCTIONAL BLOCK DIAGRAM
CONTROL
DATAP
DATAN
CLKP
CLKN
IMODP
LD
VCC
GND
ASET
IMOD
IBIAS
GND
GND
GND
GND
PAVCAP
ERCAP
ERSET
PSET
VCC
MPD
VCC
ADN2848
IBIAS
LBWSET
IMODN
IMPD
GENERAL DESCRIPTION
The ADN2848 uses a unique control algorithm to control both
the average power and extinction ratio of the laser diode, LD,
after initial factory setup. External component count and PCB
area are low as both power and extinction ratio control are
fully integrated. Programmable alarms are provided for laser fail
(end of life) and laser degrade (impending fail).
FEATURES
50 Mbps to 1.25 Gbps Operation
Single 3.3 V Operation
Bias Current Range 2 mA to 100 mA
Modulation Current Range 5 mA to 80 mA
Monitor Photo Diode Current 50
A to 1200
A
50 mA Supply Current at 3.3 V
Closed-Loop Control of Power and Extinction Ratio
Full Current Parameter Monitoring
Laser Fail and Laser Degrade Alarms
Automatic Laser Shutdown, ALS
Optional Clocked Data
Supports FEC Rates
32-Lead (5 mm
× 5 mm) LFCSP Package
APPLICATIONS
SONET OC-1/3/12
SDH STM-0/1/4
Fibre Channel
Gigabit Ethernet


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