MAX3296CTI+ Maxim Integrated Products, MAX3296CTI+ Datasheet

IC LASR DRVR 2.5GBPS 5.5V 28TQFN

MAX3296CTI+

Manufacturer Part Number
MAX3296CTI+
Description
IC LASR DRVR 2.5GBPS 5.5V 28TQFN
Manufacturer
Maxim Integrated Products
Type
Laser Diode Driver (Fiber Optic)r
Datasheet

Specifications of MAX3296CTI+

Data Rate
2.5Gbps
Number Of Channels
1
Voltage - Supply
3 V ~ 5.5 V
Current - Supply
52mA
Current - Modulation
30mA
Operating Temperature
0°C ~ 70°C
Package / Case
28-WFQFN Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-1550; Rev 6; 11/04
Typical Application Circuits and Selector Guide appear at
end of data sheet.
The MAX3286/MAX3296 series of products are high-
speed laser drivers for fiber optic LAN transmitters opti-
mized for Gigabit Ethernet applications. Each device
contains a bias generator, laser modulator, and com-
prehensive safety features. Automatic power control
(APC) adjusts the laser bias current to maintain aver-
age optical power at a constant level, regardless of
changes in temperature or laser properties. For lasers
without a monitor photodiode, these products offer a
constant-current mode. The circuit can be configured
for use with conventional shortwave (780nm to 850nm)
or longwave (1300nm) laser diodes, as well as vertical-
cavity surface-emitting lasers (VCSELs).
The MAX3286 series (MAX3286–MAX3289) is opti-
mized for operation at 1.25Gbps, and the MAX3296
series (MAX3296–MAX3299) is optimized for 2.5Gbps
operation. Each device can switch 30mA of laser mod-
ulation current at the specified data rate. Adjustable
temperature compensation is provided to keep the opti-
cal extinction ratio within specifications over the operat-
ing temperature range. This series of devices is
optimized to drive lasers packaged in low-cost TO-46
headers. Deterministic jitter (DJ) for the MAX3286 is
typically 22ps, allowing a 72% margin to Gigabit
Ethernet DJ specifications.
These laser drivers provide extensive safety features to
guarantee single-point fault tolerance. Safety features
include dual enable inputs, dual shutdown circuits, and
a laser-power monitor. The safety circuit detects faults
that could cause dangerous light output levels. A pro-
grammable power-on reset pulse initializes the laser
driver at startup.
The MAX3286/MAX3296 are available in a compact, 5mm
32-pin TQFP package; or in die form. The MAX3287/
MAX3288/MAX3289 and MAX3297/MAX3298/MAX3299
are available in a 16-pin TSSOP-EP package.
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.
5mm, 28-pin QFN or thin QFN package; a 5mm
Gigabit Ethernet Optical Transmitter
Fibre Channel Optical Transmitter
ATM LAN Optical Transmitter
________________________________________________________________ Maxim Integrated Products
General Description
Applications
3.0V to 5.5V, 1.25Gbps/2.5Gbps
5mm,
Ordering Information continued at end of data sheet.
♦ 7ps Deterministic Jitter (MAX3296)
♦ +3.0V to +5.5V Supply Voltage
♦ Selectable Laser Pinning (Common Cathode or
♦ 30mA Laser Modulation Current
♦ Temperature Compensation of Modulation Current
♦ Automatic Laser Power Control or Constant
♦ Integrated Safety Circuits
♦ Power-On Reset Signal
♦ QFN and Thin QFN Packages Available
*Dice are designed to operate from T
are tested and guaranteed only at T
**Exposed pad.
***Package Code: G2855-1
****Package Code: T2855-7
+Denotes Lead-Free Package.
MAX3286CTI+
MAX3286CGI
MAX3286CHJ
*Exposed pad is connected to GND.
Pin Configurations continued at end of data sheet.
22ps Deterministic Jitter (MAX3286)
Common Anode) (MAX3286/MAX3296)
Bias Current
PART
TOP VIEW
PORDLY
FAULT
FAULT
GND
POR
EN
EN
LAN Laser Drivers
1
2
3
4
5
6
7
+
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
THIN QFN*
MAX3286
MAX3296
Pin Configurations
A
J
= +25°C.
= 0°C to +110°C, but
PIN-PACKAGE
28 Thin QFN
(5mm x 5mm)****
28 QFN
(5mm x 5mm)***
32 TQFP
(5mm x 5mm)
21
20
19
18
17
16
15
Features
BIASDRV
SHDNDRV
GND
MON
MD
POL
POL
1

Related parts for MAX3296CTI+

MAX3296CTI+ Summary of contents

Page 1

... Fibre Channel Optical Transmitter ATM LAN Optical Transmitter Typical Application Circuits and Selector Guide appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. 3.0V to 5.5V, 1.25Gbps/2.5Gbps ♦ ...

Page 2

LAN Laser Drivers ABSOLUTE MAXIMUM RATINGS Supply Voltage at V ..........................................-0.5V to +7.0V CC EN, EN, PORDLY, FLTDLY, LV, IN+, IN-, Voltage at REF, POL, POL, MD, MON, BIASDRV, MODSET, TC.......................................................-0. Voltage at OUT+, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V 0°C to +70°C, unless otherwise noted. Typical values are see Figure 1a.) PARAMETER SYMBOL SHUTDOWN Voltage at SHDNDRV LASER MODULATOR Data Rate Minimum Laser Modulation Current ...

Page 4

LAN Laser Drivers ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V 0°C to +70°C, unless otherwise noted. Typical values are see Figure 1a.) PARAMETER SYMBOL FLTDLY Duration t FLTDLY EN ...

Page 5

A EN STARTUP (COMMON-ANODE CONFIGURATION) EN FAULT BIASDRV OPTICAL OUTPUT 5 s/div PIN TSSOP-EP QFN/ TQFP MAX3287 THIN QFN MAX3286 MAX3297 MAX3286 MAX3296 MAX3289 MAX3296 MAX3299 1 1 — ...

Page 6

LAN Laser Drivers PIN TSSOP-EP QFN/ TQFP MAX3287 THIN QFN MAX3286 MAX3297 MAX3286 MAX3296 MAX3289 MAX3296 MAX3299 10, 22, 23, 11, 25, 26 ...

Page 7

PIN TSSOP-EP QFN/ TQFP MAX3287 THIN QFN MAX3286 MAX3297 MAX3286 MAX3296 MAX3289 MAX3296 MAX3299 — Table 1. Typical Fault Conditions PIN FAULT CONDITION GND and ...

Page 8

LAN Laser Drivers FERRITE BEAD OUT- OUT MAX3286 CC MAX3296 50 IN IN- MODSET MODULATION CONTROL *MURATA BLM11HA102 R MOD TC Figure 1a. Output Load ...

Page 9

LV POR CIRCUIT PORDLY EN EN SAFETY FLTDLY POL POL BIAS GENERATOR MON MD IN+ LASER IN- MODULATOR MODSET TC Figure 2a. Simplified Laser Driver Functional Diagram PORDLY POR POR CIRCUIT FAULT FAULT FLTDLY EN EN POL SMOOTH- POL START ...

Page 10

LAN Laser Drivers impedance). This ensures that the PNP or NPN transistor is turned off, removing the laser-bias current. (See the Applications Information section.) The REF pin provides a controlled reference voltage dependent upon the voltage ...

Page 11

The shutdown condition is latched until reset by a toggle of EN, EN, or power. Another safety system, open fiber control (OFC), uses safety interlocks to prevent eye hazards. To accommo- date ...

Page 12

LAN Laser Drivers PORDLY V CC 28k 25k LV VARIABLE DELAY = 0.7s 36k 1.2V BANDGAP Figure 7. Power-On Reset Circuit switched low, then high switched to high, ...

Page 13

30mA 100 MOD Figure 8a. R vs. R for Various Conditions TC MOD LOAD NOTE ...

Page 14

LAN Laser Drivers Q1 = general-purpose PNP, >100 ferrite bead (see Bias Filter section general-purpose PMOS device (optional) Common Cathode with Current Feedback In the common-cathode configuration with current feed- back, ...

Page 15

The relationship between laser bias current and R is shown in Figure 11. The remaining discrete compo- nents used with the common cathode without photodi- ode configuration are as follows general-purpose PNP, >100 ferrite bead ...

Page 16

LAN Laser Drivers Designing the Bias Filter and Output Pullup Beads To reduce deterministic jitter, add a ferrite-bead induc- tor between the collector of the biasing transistor and either the anode or the cathode of the ...

Page 17

Table 5. Circuit Response to Various Single-Point Faults CIRCUIT RESPONSE TO OVERVOLTAGE OR PIN NAME FAULT Does not affect laser power FAULT Does not affect laser power POR Does not affect laser power PORDLY Does not affect laser power EN ...

Page 18

LAN Laser Drivers The modulator is not needed. Leave TC and MODSET open. Connect IN+ to VCC, IN- to REF, and leave OUT+ and OUT– open. The MAX3286/MAX3296 series uses bondpads with gold metalization. Make connections ...

Page 19

INPUT COMMON-MODE VOLTAGE V R Q1, Q2 > 100k IN Figure 17. Data Inputs V CC MAX3286 MAX3296 40 40 Figure 18. BIASDRV Output ______________________________________________________________________________________ 3.0V to 5.5V, 1.25Gbps/2.5Gbps PACKAGE MAX3286 MAX3296 V CC IN+ 1.5nH 1pF 400 ...

Page 20

... Ordering Information (continued) PART TEMP RANGE MAX3286C/D 0°C to +70°C MAX3287CUE 0°C to +70°C MAX3288CUE 0°C to +70°C MAX3289CUE 0°C to +70°C MAX3296CTI+ 0°C to +70°C MAX3296CGI 0°C to +70°C MAX3296CHJ 0°C to +70°C MAX3296C/D 0°C to +70°C MAX3297CUE 0°C to +70°C MAX3298CUE 0° ...

Page 21

TOP VIEW FAULT 1 FAULT 2 POR 3 MAX3286 GND 4 MAX3296 PORDLY 7 QFN* GND FLTDLY 2 15 MODSET MAX3287 IN+ 4 ...

Page 22

LAN Laser Drivers MAX3286/MAX3296 0.01 F COMMON-CATHODE VCSEL FLTDLY WITH PHOTODIODE PORDLY 0.01 F 0.01 F IN+ DATA 115 INPUT IN- 0.01 F POR FAULT FAULT LV POL 0.01 F MAX3286/MAX3296 FLTDLY COMMON-CATHODE VCSEL WITHOUT PHOTODIODE ...

Page 23

F MAX3286/MAX3296 FLTDLY COMMON-ANODE LASER WITH PHOTODIODE PORDLY 0.01 F 0.01 F IN+ DATA 115 INPUT IN- 0.01 F POR FAULT FAULT LV SHDNDRV POL MAX3287/MAX3297 COMMON-CATHODE VCSEL WITH PHOTODIODE 0.01 F IN+ DATA 115 INPUT IN- 0.01 F ...

Page 24

LAN Laser Drivers MAX3288/MAX3298 COMMON-CATHODE VCSEL WITHOUT PHOTODIODE 0.01 F IN+ DATA 115 INPUT IN- 0.01 F 0.01 F FLTDLY MAX3289/MAX3299 COMMON-ANODE LASER WITH PHOTODIODE 0.01 F IN+ DATA 115 INPUT IN- 0.01 F 0.01 F ...

Page 25

MAX3286 FLTDLY LV HF34Z- IN+ IN- GND REF 0.053" (1.346mm) TRANSISTOR COUNT: 1154 SUBSTRATE CONNECTED TO GND ______________________________________________________________________________________ 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers FLTDLY TC LV MODSET HF34Z 0.072" (1.829mm) IN+ OUT- ...

Page 26

LAN Laser Drivers (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.) 26 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, 32L TQFP, 5x5x1.0mm, ...

Page 27

For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers Package Information (continued) 27 ...

Page 28

... Maxim product could create a situation where personal injury or death may occur. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 28 © 2005 Maxim Integrated Products ...

Related keywords