ADN2847ACP-32 データシートの表示（PDF） - Analog Devices

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ADN2847ACP-32

3 V Dual-Loop 50 Mbps to 3.3 Gbps Laser Diode Driver

Analog Devices 

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3 V Dual-Loop 50 Mbps to 3.3 Gbps

Laser Diode Driver

ADN2847

FEATURES

50 Mbps to 3.3 Gbps Operation

Single 3.3 V Operation

Typical Rise/Fall Time 80 ps

Bias Current Range 2 mA to 100 mA

Modulation Current Range 5 mA to 80 mA

Monitor Photodiode Current 50 ␮A to 1200 ␮A

Dual MPD Functionality for DWDM

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

48-Lead (7 mm ؋ 7 mm) LFCSP Package

32-Lead (5 mm ؋ 5 mm) LFCSP Package

Available in Die Form

APPLICATIONS

SONET OC-1/3/12/48

SDH STM-0/1/4/16

Fibre Channel

Gigabit Ethernet

DWDM Dual MPD Wavelength Control

GENERAL DESCRIPTION

The ADN2847 uses a unique control algorithm to control both

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).

Optional dual MPD current monitoring is designed into the

ADN2847 specifically for DWDM wavelength control.

FUNCTIONAL BLOCK DIAGRAM

VCC

MPD

IMPD

IMPD2

GND PSET

GND ERSET

GND

ERCAP

GND

VCC

IMODN

IMODP

VCC

LD

IMOD

CONTROL

IBIAS

PAVCAP

GND

IDTONE

ADN2847

LBWSET

DATAP

DATAN

CLKP

CLKN

IBIAS

ASET

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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