ADN2848ACPZ-32-RL7

3.3 V Dual-Loop 50 Mbps to 1.25 Gbps
Laser Diode Driver
Data Sheet
ADN2848
Rev. B Document Feedback
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FEATURES
50 Mbps to 1.25 Gbps operation
Single 3.3 V operation
Bias current range: 2 to 100 mA
Modulation current range: 5 to 80 mA
Monitor photo diode current: 50 μA to 1200 μA
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_VQ package
APPLICATIONS
SONET OC-1/3/12/24
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 the extinction ratio of the laser diode
(LD) after initial factory setup. External component count and
PCB area are low because both power and extinction ratio
control are fully integrated. Programmable alarms are provided
for laser fail (end of life) and laser degrade (impending fail).
FUNCTIONAL BLOCK DIAGRAM
V
CC
GND
GND
V
CC
LD
GND
DATAP
DATAN
CLKP
CLKN
IMODP
I
BIAS
ASET
ADN2848
I
BIAS
I
MOD
GND
GND
CONTROL
IMPD
PSET
ERSET
LBWSET
ERCAP
PAVCAP
GND
V
CC
CLKSEL
IMODN
V
CC
DEGRADE
FAIL
ALS
IMPDMON
IMMON
IBMON
MPD
02746-001
V
CC
R
Z
Figure 1.
ADN2848* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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DOCUMENTATION
Application Notes
AN-637: ADN2848 AC-Coupled Optical Evaluation Kit
AN-658: Optical Channel Identification on the ADN284x
Laser Drivers (Part I)
Data Sheet
ADN2848: 3.3 V Dual-Loop 50 Mbps to 1.25 Gbps Laser
Diode Driver Data Sheet
REFERENCE MATERIALS
Informational
Optical and High Speed Networking ICs
Technical Articles
Dual-Loop Laser Drivers Bring Robustness To Optical
Networks
DESIGN RESOURCES
ADN2848 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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DOCUMENT FEEDBACK
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ADN2848 Data Sheet
Rev. B | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Theory of Operation ........................................................................ 7
Control ........................................................................................... 7
Loop Bandwidth Selection .......................................................... 7
Alarms .............................................................................................7
Monitor Currents ..........................................................................8
Data and Clock Inputs ..................................................................8
CCBIAS ...........................................................................................8
I
BIAS
...................................................................................................8
Automatic Laser Shutdown ..........................................................8
Alarm Interfaces ............................................................................8
Power Consumption .....................................................................9
Laser Diode Interfacing ................................................................9
Optical Supervisor.........................................................................9
Outline Dimensions ....................................................................... 12
Ordering Guide .......................................................................... 12
REVISION HISTORY
2/13—Rev. A to Rev. B
Added EPAD Notation..................................................................... 6
Changes to Endnote ......................................................................... 8
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 12
8/06Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changes to Figure 1 .......................................................................... 1
Changes to Specifications ................................................................ 3
Changes to Figure 8 ........................................................................ 10
Changes to Figure 9 to Figure11 ................................................... 11
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 12
1/03Revision 0: Initial Version

ADN2848ACPZ-32-RL7

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Laser Drivers 155Mbps-622Mbps, 3V, Laser Diode Driver
Lifecycle:
New from this manufacturer.
Delivery:
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