MAX3869EHJ+ Maxim Integrated Products, MAX3869EHJ+ Datasheet

IC LASER DRIVR 2CHAN 5.5V 32TQFP

MAX3869EHJ+

Manufacturer Part Number
MAX3869EHJ+
Description
IC LASER DRIVR 2CHAN 5.5V 32TQFP
Manufacturer
Maxim Integrated Products
Type
Laser Diode Driver (Fiber Optic)r
Datasheet
1.MAX3869EHJ.pdf (15 pages)

Specifications of MAX3869EHJ+

Data Rate
2.5Gbps
Number Of Channels
2
Voltage - Supply
3.14 V ~ 5.5 V
Current - Supply
64mA
Current - Modulation
60mA
Current - Bias
100mA
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TFQFP, Exposed Pad
Mounting Type
Surface Mount
Operating Supply Voltage
3.3 V
Supply Current
64 mA
Maximum Power Dissipation
1444 mW
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3869 is a complete, single +3.3V laser driver
for SDH/SONET applications up to 2.5Gbps. The
device accepts differential PECL data and clock inputs
and provides bias and modulation currents for driving a
laser. A synchronizing input latch can be used (if a
clock signal is available) to reduce jitter.
An automatic power control (APC) feedback loop is
incorporated to maintain a constant average optical
power over temperature and lifetime. The wide modula-
tion current range of 5mA to 60mA and bias current of
1mA to 100mA are easy to program, making this prod-
uct ideal for use in various SDH/SONET applications.
The MAX3869 also provides enable control, two current
monitors that are directly proportional to the laser bias and
modulation currents, and a failure-monitor output to indi-
cate when the APC loop is unable to maintain the average
optical power. The MAX3869 is available in 32-pin TQFP
and small 32-pin QFN packages as well as dice.
Pin Configuration appears at end of data sheet.
19-1570; Rev 4; 1/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
SONET/SDH Transmission Systems
Add/Drop Multiplexers
Digital Cross-Connects
Section Regenerators
2.5Gbps Optical Transmitters
CLOCK GEN.
SERIALIZER
MAX3890
WITH
________________________________________________________________ Maxim Integrated Products
+3.3V, 2.5Gbps SDH/SONET Laser Driver
124Ω
84.5Ω
General Description
84.5Ω
124Ω
Applications
+3.3V
84.5Ω
124Ω
with Current Monitors and APC
84.5Ω
124Ω
DATA+
DATA-
CLK+
CLK-
MAX3869
♦ Single +3.3V or +5V Power Supply
♦ 64mA Supply Current at +3.3V
♦ Programmable Bias Current from 1mA to 100mA
♦ Programmable Modulation Current from
♦ Bias Current and Modulation Current Monitors
♦ 87ps Rise/Fall Time
♦ Automatic Average Power Control with Failure
♦ Complies with ANSI, ITU, and Bellcore
♦ Enable Control
*Exposed pad.
**Package Code: G3255-1
***Dice are designed to operate over this range, but are tested and
guaranteed at T
+Denotes lead-free package.
MAX3869EHJ
MAX3869EHJ+
MAX3869EGJ
MAX3869E/D
5mA to 60mA
Monitor
SDH/SONET Specifications
PART
OUT+
OUT-
BIAS
MD
Typical Application Circuit
A
25Ω
= +25°C only. Contact factory for availability.
+3.3V
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
+3.3V
MODMON
BIASMON
0.056µF
FERRITE
BEAD
23Ω
1000pF
PIN-PACKAGE
32 TQFP-EP*
32 TQFP-EP*
32 QFN**
Dice***
Features
LD
0.01µF
1

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MAX3869EHJ+ Summary of contents

Page 1

... Automatic Average Power Control with Failure Monitor ♦ Complies with ANSI, ITU, and Bellcore SDH/SONET Specifications ♦ Enable Control PART MAX3869EHJ Applications MAX3869EHJ+ MAX3869EGJ MAX3869E/D *Exposed pad. **Package Code: G3255-1 ***Dice are designed to operate over this range, but are tested and guaranteed at T +Denotes lead-free package. ...

Page 2

SDH/SONET Laser Driver with Current Monitors and APC ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ............................................. -0.5V to +7.0V CC Current into BIAS ...........................................-20mA to +150mA Current into OUT+, OUT- ................................-20mA to +100mA Current into MD.....................................................-5mA to +5mA Voltage ...

Page 3

SDH/SONET Laser Driver AC ELECTRICAL CHARACTERISTICS (V = +3.14V to +5.5V, load as shown in Figure (Note 7) PARAMETER SYMBOL Input Latch Setup Time t SU Input Latch Hold Time t Modulation-Current Range I MOD ...

Page 4

SDH/SONET Laser Driver with Current Monitors and APC ARE SMD FERRITE BEADS BLM11A601S MURATA ELECTRONICS A = BLM21A102S MURATA ELECTRONICS B B MAX3869 0.056µF OUT- I OUT + OUT+ 0.056µF ...

Page 5

SDH/SONET Laser Driver (V = +3.3V, load as shown in Figure ELECTRICAL EYE DIAGRAM 30mA +80 CID, 32 TQFP-EP) MOD 100ps/div I vs. R BIASMAX BIASMAX 120 100 80 60 ...

Page 6

SDH/SONET Laser Driver with Current Monitors and APC (V = +3.3V, load as shown in Figure MODULATION-CURRENT MONITOR GAIN vs. TEMPERATURE 100mA, I BIAS 10mA, I BIAS 25 ...

Page 7

SDH/SONET Laser Driver PIN NAME 20 OUT- Negative Modulation-Current Output GND4 Ground for Output Circuitry 23 GND3 Ground for APC Monitor Diode Input. Connect this pad to a monitor photodiode anode. A capacitor to ground 24 ...

Page 8

SDH/SONET Laser Driver with Current Monitors and APC MAX3869 DATA D Q CLK ENABLE BIASMON I BIAS 37 MOBMON I MOD 29 MODSET R MODSET Figure 4. Functional Diagram laser package is used to convert the optical power ...

Page 9

SDH/SONET Laser Driver Optional Data Input Latch To minimize input data pattern-dependent jitter, the dif- ferential clock signal should be connected to the data input latch, which is selected by an external LATCH control. If LATCH is high, ...

Page 10

SDH/SONET Laser Driver with Current Monitors and APC should equal 25Ω. Typical values for R 23Ω. For best performance, a bypass capacitor (0.01µF typical) should be placed as close as possible to the anode of the laser diode. ...

Page 11

SDH/SONET Laser Driver Determine R Calculate the maximum threshold current ( +85°C and end of life. Assuming I A 50mA, the maximum bias current should be BIASMAX TH(MAX) In this example, ...

Page 12

SDH/SONET Laser Driver with Current Monitors and APC Pin Configurations TOP VIEW CC1 DATA+ 2 DATA CC1 MAX3869 CLK+ 5 CLK CC1 LATCH 8 ...

Page 13

SDH/SONET Laser Driver (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ with Current Monitors and APC Package Information PACKAGE OUTLINE, 32L TQFP, ...

Page 14

SDH/SONET Laser Driver with Current Monitors and APC (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 14 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2005 Maxim Integrated Products ...

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