ADN2525ACPZ-REEL7 Analog Devices Inc, ADN2525ACPZ-REEL7 Datasheet

IC,Laser Diode/LED Driver,LLCC,16PIN,PLASTIC

ADN2525ACPZ-REEL7

Manufacturer Part Number
ADN2525ACPZ-REEL7
Description
IC,Laser Diode/LED Driver,LLCC,16PIN,PLASTIC
Manufacturer
Analog Devices Inc
Type
Laser Diode Driver (Fiber Optic)r
Datasheet

Specifications of ADN2525ACPZ-REEL7

Data Rate
10.7Gbps
Number Of Channels
1
Voltage - Supply
3.07 V ~ 3.53 V
Current - Supply
39mA
Current - Modulation
80mA
Current - Bias
100mA
Operating Temperature
-40°C ~ 85°C
Package / Case
16-VFQFN, CSP Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADN2525ACPZ-REEL7
Manufacturer:
ADI
Quantity:
15 915
Company:
Part Number:
ADN2525ACPZ-REEL7,ADI/
0
FEATURES
Up to 10.7 Gbps operation
Very low power: 670 mW (IBIAS = 40 mA, IMOD = 40 mA)
Typical 24 ps rise/fall times
Full back-termination of output transmission lines
Compatible with XMD-MSA TOSA
Drives TOSAs with resistances ranging from 5 Ω to 50 Ω
PECL-/CML-compatible data inputs
Bias current range: 10 mA to 100 mA
Differential modulation current range: 10 mA to 80 mA
Automatic laser shutdown (ALS)
3.3 V operation
Compact 3 mm × 3 mm LFCSP
Voltage input control for bias and modulation currents
XFP-compliant bias current monitor
Optical evaluation board available
APPLICATIONS
SONET OC-192 optical transceivers
SDH STM-64 optical transceivers
10 Gb Ethernet optical transceivers
XFP/X2/XENPAK/XPAK/MSA 300 optical modules
SR and VSR optical links
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.
DATAP
DATAN
MSET
50Ω
800Ω
FUNCTIONAL BLOCK DIAGRAM
50Ω
200Ω
GND
VCC
VCC
GND
10.7 Gbps Active Back-Termination,
VCC
Figure 1.
BSET
800Ω
Differential Laser Diode Driver
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The ADN2525 laser diode driver is designed for direct modula-
tion of packaged laser diodes having a differential resistance
ranging from 5 Ω to 50 Ω. The active back-termination technique
provides excellent matching with the output transmission lines
while reducing the power dissipation in the output stage. The
back-termination in the ADN2525 absorbs signal reflections
from the TOSA end of the output transmission lines, enabling
excellent optical eye quality to be achieved even when the
TOSA end of the output transmission lines is significantly
misterminated. The small package provides the optimum
solution for compact modules where laser diodes are packaged
in low pin-count optical subassemblies.
The modulation and bias currents are programmable via the
MSET and BSET control pins. By driving these pins with
control voltages, the user has the flexibility to implement
various average power and extinction ratio control schemes,
including closed-loop control and look-up tables. The automatic
laser shutdown (ALS) feature allows the user to turn on/off the
bias and modulation currents by driving the ALS pin with the
proper logic levels.
The product is available in a space-saving 3 mm × 3 mm LFCSP
specified from −40°C to +85°C.
200Ω
50Ω
ALS
ADN2525
IMOD
200Ω
VCC
2Ω
©2006 Analog Devices, Inc. All rights reserved.
IMODP
IMODN
IBMON
IBIAS
ADN2525
www.analog.com

Related parts for ADN2525ACPZ-REEL7

ADN2525ACPZ-REEL7 Summary of contents

Page 1

FEATURES Up to 10.7 Gbps operation Very low power: 670 mW (IBIAS = 40 mA, IMOD = 40 mA) Typical 24 ps rise/fall times Full back-termination of output transmission lines Compatible with XMD-MSA TOSA Drives TOSAs with resistances ranging from ...

Page 2

ADN2525 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Thermal Specifications ................................................................ 4 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. ...

Page 3

SPECIFICATIONS VCC = VCC to VCC , T = −40°C to +85°C, 50 Ω differential load resistance, unless otherwise noted. Typical values are specified at MIN MAX A 25°C, IMOD = 40 mA. Table 1. Parameter BIAS CURRENT (IBIAS) Bias ...

Page 4

ADN2525 1 Refers to the voltage between the pin for which the compliance voltage is specified and GND. 2 The pattern used is composed by a repetitive sequence of eight 1s followed by eight 0s at 10.7 Gbps. 3 Measured ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Min Supply Voltage, VCC to GND −0.3 IMODP, IMODN to GND VCC − DATAP, DATAN to GND VCC − 1.8 All Other Pins −0.3 Junction Temperature Storage Temperature Range −65 Soldering Temperature ...

Page 6

ADN2525 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Note that the exposed pad on the bottom of the package must be connected to the VCC or GND plane. Table 4. Pin Function Description Pin No. Mnemonic 1 MSET ALS ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, VCC = 3.3 V, unless otherwise noted. A 28.0 27.5 27.0 26.5 26.0 25.5 25.0 24.5 24.0 23.5 23 DIFFERENTIAL MODULATION CURRENT (mA) Figure 5. Rise Time vs. IMOD 27.5 ...

Page 8

ADN2525 0 –5 –10 –15 –20 –25 –30 –35 – FREQUENCY (GHz) Figure 11. Differential |S22 ...

Page 9

THEORY OF OPERATION As shown in Figure 1, the ADN2525 consists of an input stage and two voltage-controlled current sources for bias and modulation. The bias current is available at the IBIAS pin controlled by the voltage at ...

Page 10

ADN2525 The equivalent circuits of the BSET, IBIAS, and IBMON pins are shown in Figure 20, Figure 21, and Figure 22. VCC VCC BSET 800Ω 200Ω Figure 20. Equivalent Circuit of the BSET Pin IBIAS VCC VCC 100Ω 2Ω Figure ...

Page 11

No portion of the modulation current flows in the active back- termination resistance. All of the preset modulation current IMOD, the range specified in Table 1, ...

Page 12

ADN2525 IMODP, IMODN VCC + 1.1V NORMAL OPERATION REGION VCC VCC – 1.1V Figure 30. Allowable Range for the Voltage at IMODP and IMODN LOAD MISTERMINATION Due to its excellent S22 performance, the ADN2525 can drive differential loads that range ...

Page 13

APPLICATIONS INFORMATION TYPICAL APPLICATION CIRCUIT Figure 33 shows the typical application circuit for the ADN2525. The dc voltages applied to the BSET and MSET pins control the bias and modulation currents. The bias current can be monitored as a voltage ...

Page 14

ADN2525 DESIGN EXAMPLE This design example covers: • Headroom calculations for IBIAS, IMODP, and IMODN pins. • Calculation of the typical voltage required at the BSET and MSET pins to produce the desired bias and modulation currents. This design example ...

Page 15

... MAX 0.90 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range ADN2525ACPZ-WP 1 −40°C to +85°C 1 ADN2525ACPZ-R2 −40°C to +85°C 1 ADN2525ACPZ-REEL7 −40°C to +85° Pb-free part. 3.00 0.60 MAX BSC SQ 0. 2.75 TOP BSC SQ VIEW 9 (BOTTOM VIEW) 0.50 ...

Page 16

ADN2525 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05077-0-8/06(A) T Rev Page ...

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