ADN2848ACP-32 Ver la hoja de datos (PDF) - Analog Devices

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ADN2848ACP-32

3 V Dual-Loop 50 Mbps to 1.25 Gbps Laser Diode Driver

Analog Devices 

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3 V Dual-Loop 50 Mbps to 1.25 Gbps

Laser Diode Driver

ADN2848

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

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).

MPD

VCC

IMPD

PSET

GND ERSET

GND

FUNCTIONAL BLOCK DIAGRAM

VCC

IMODN

IMODP

VCC

LD

IMOD

CONTROL

IBIAS

ERCAP

DATAP

DATAN

CLKP

CLKN

IBIAS

ADN2848

ASET

PAVCAP

LBWSET

GND

GND

GND

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 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.

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