ADN2847ACPZ-32 Analog Devices Inc, ADN2847ACPZ-32 Datasheet

IC,Laser Diode/LED Driver,LLCC,32PIN,PLASTIC

ADN2847ACPZ-32

Manufacturer Part Number
ADN2847ACPZ-32
Description
IC,Laser Diode/LED Driver,LLCC,32PIN,PLASTIC
Manufacturer
Analog Devices Inc
Type
Laser Diode Driver (Fiber Optic)r
Datasheet

Specifications of ADN2847ACPZ-32

Data Rate
3.3Gbps
Number Of Channels
1
Voltage - Supply
3 V ~ 3.6 V
Current - Supply
50mA
Current - Modulation
80mA
Current - Bias
100mA
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VFQFN, CSP Exposed Pad
Mounting Type
Surface Mount
Package
32LFCSP EP
Number Of Channels Per Chip
1
Operating Supply Voltage
3 to 3.6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADN2847ACPZ-32
Quantity:
25
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 μA to 1200 μA
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
Rev. A
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. Specifications subject to change without notice. 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 owners.
MPD
GND
GND
GND
ERSET
IMPD2
PSET
V
IMPD
CC
GND
ERCAP
FUNCTIONAL BLOCK DIAGRAM
GND
CONTROL
PAVCAP
3.3 V Dual-Loop 50 Mbps to 3.3 Gbps
I
I
Figure 1.
MOD
BIAS
IDTONE
V
CC
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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.
The ADN2847 is specified for the −40°C to +85°C temperature
range and is available in a 48-lead LFCSP package and a 32-lead
LFCSP package.
IMODN
ADN2847
LBWSET
IMODP
ASET
I
BIAS
GND
©2006 Analog Devices, Inc. All rights reserved.
Laser Diode Driver
DATAP
DATAN
CLKP
CLKN
LD
V
CC
V
CC
R
Z
ADN2847
www.analog.com

Related parts for ADN2847ACPZ-32

ADN2847ACPZ-32 Summary of contents

Page 1

FEATURES 50 Mbps to 3.3 Gbps operation Single 3.3 V operation Typical rise/fall time Bias current range 100 mA Modulation current range Monitor photodiode current: 50 μA to 1200 μA ...

Page 2

ADN2847 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Diagrams.......................................................................... 4 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Die Pad ...

Page 3

SPECIFICATIONS 3.6 V. Temperature range: −40°C to +85°C. All specifications 25°C. A Table 1. Parameter LASER BIAS CURRENT (I , ALS) BIAS Output Current I BIAS I when ALS is ...

Page 4

ADN2847 Parameter IBMON, IMMON, IMPDMON, IMPDMON2 IBMON, IMMON Division Ratio IMPDMON, IMPDMON2 IMPDMON to IMPDMON2 Matching Compliance Voltage SUPPLY The high speed performance for the die version of ADN2847 can be achieved when ...

Page 5

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 2. Parameter V to GND CC Digital Inputs (ALS, LBWSET, CLKSEL) IMODN, IMODP Operating Temperature Range Industrial Storage Temperature Range Junction Temperature (T max Power Dissipation (W) ...

Page 6

ADN2847 DIE PAD COORDINATES 2620µm GND2 GND2 IMMON V 3 FAIL CC IDTONE IBMON GND3 ALS GND2 IMODN IMODN GND2 IMODP IMODP GND2 GND2 I BIAS I BIAS CCBIAS GND ASET PSET IMPD IMPDMON2 LBWSET ERSET GND ...

Page 7

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TP1 1 LBWSET 2 PIN 1 ASET 3 INDICATOR ERSET 4 PSET 5 TP2 6 ADN2847 IMPD 7 TOP VIEW IMPDMON 8 IMPDMON2 9 IMPD2 10 GND4 Figure 7. 48-Lead ...

Page 8

ADN2847 Pin Number 48-Lead 32-Lead Mnemonic 31 22 GND3 32 23 IMMON 33 24 IBMON 34 N/A GND2 35 N/A IDTONE 36 N/A GND2 37 N/A GND2 IMODN 40 N/A IMODN 41 27 ...

Page 9

THEORY OF OPERATION Laser diodes have current-in to light-out transfer functions, as shown in Figure 9. Two key characteristics of this transfer function are the threshold current and the slope in the TH linear region beyond the threshold ...

Page 10

ADN2847 The laser degrade alarm, DEGRADE, is provided to give a warning of imminent laser failure if the laser diode degrades further or environmental conditions continue to stress the LD, such as increasing temperature. The laser fail alarm, FAIL, is ...

Page 11

REF CLOCK 20MHz TO 180MHz CLKIN 9 AD9850/AD9851 AD9834 DDS 12 R SET CONTROLLER Figure 12. Application Circuit to Allow Fiber Identification Using the AD9850/AD9851 ALARM INTERFACES The FAIL and DEGRADE outputs have an internal pull-up resistor of 30 kΩ, ...

Page 12

ADN2847 37 GND2 IMODN V CC IMODN MPD LD GND2 * IMODP * IMODP * GND2 GND2 10µH CCBIAS LASER DIODE MPD = MONITOR PHOTODIODE ...

Page 13

GND2 * IMODN IMODN MPD LD GND2 * IMODP * * IMODP * GND2 GND2 BIAS Z I BIAS 1µH CCBIAS ...

Page 14

ADN2847 OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 SEATING PLANE PIN 1 INDICATOR 1.00 12° MAX 0.85 0.80 SEATING PLANE 5.00 BSC SQ 0.60 MAX 0.50 BSC TOP 4.75 VIEW BSC SQ 0.50 0.40 0.30 0.80 MAX ...

Page 15

... ADN2847ACP-32-RL7 −40°C to +85°C 1 ADN2847ACPZ-32 −40°C to +85°C 1 ADN2847ACPZ-32-RL −40°C to +85°C 1 ADN2847ACPZ-32-RL7 −40°C to +85°C ADN2847ACP-48 −40°C to +85°C ADN2847ACP-48-RL −40°C to +85°C 1 ADN2847ACPZ-48 −40°C to +85°C EVAL-ADN2847-32-OP EB-ADN2847/8-32- Pb-free part ...

Page 16

ADN2847 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C02745-0-10/06(A) Rev Page ...

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