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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3643 Datasheet

155Mbps to 2.5Gbps Burst-Mode Laser Driver

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EVALUATION KIT AVAILABLE
MAX3643
155Mbps to 2.5Gbps Burst-Mode Laser Driver
General Description
The MAX3643 burst-mode laser driver provides bias and
modulation current drive for PON burst-mode ONT appli-
cations. It is specifically designed for use with a low-cost
external controller for the APC (and if desired, AMC) loop.
A high-speed differential burst-enable input enables the
driver to switch the laser from a dark (output off) condition
to full on-condition in less than 2ns. When BEN is inac-
tive, typical modulation and bias currents are 5µA each.
Laser modulation current can be set from 10mA to
85mA and bias current can be set from 1mA to 70mA
using the MODSET and BIASSET inputs. A sample-and-
hold circuit is provided to capture the monitor diode
output during short PON bursts, if needed, and the BEN
high-speed signal is mirrored on an LVCMOS output to
be used by the controller operating the APC/AMC loop.
The MAX3643 burst-mode laser driver is packaged in a
4mm x 4mm, 24-pin thin QFN package. It operates from
-40°C to +85°C.
Applications
A/B/G/XGPON ONT Modules Up to 2.5Gbps
1.25Gbps IEEE EPON ONT Modules
Features
10mA to 85mA Modulation Current
1mA to 70mA Bias Current
Monitor Diode Sample and Hold
45ps Output Transition Time
2ns Turn-On/-Off Time
Reference Voltage Generator
LVPECL High-Speed Inputs (Data, Burst Enable)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3643ETG
-40°C to +85°C 24 TQFN-EP*
MAX3643ETG+
-40°C to +85°C 24 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
3.3V
3.3V
SERIAL
DATA
SOURCE
130Ω 130Ω
Z0 = 50Ω
Z0 = 50Ω
82Ω 82Ω
IN+
IN-
3.3V
+3.3V
FILTER
VCC
MAX3643
BURST
CONTROL
130Ω 130Ω
Z0 = 50Ω
Z0 = 50Ω
82Ω 82Ω
BEN+
BEN-
3kΩ
1kΩ
15Ω 10nH
OUT-
OUT+
BIAS+
15Ω
5.6Ω
5.6Ω
BIAS-
10Ω
MDIN
75Ω
27pF
+3.3V
10pF
1kΩ
MDOUT
1kΩ
MON1
BMD
DS1875
PON TRIPLEXER AND SFP
CONTROLLER
BEN
BIAS
MOD
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-3848; Rev 4; 12/12


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3643 Datasheet

155Mbps to 2.5Gbps Burst-Mode Laser Driver

No Preview Available !

MAX3643
155Mbps to 2.5Gbps Burst-Mode Laser Driver
ABSOLUTE MAXIMUM RATINGS
Supply Voltage VCC ..............................................-0.5V to +4.0V
Current into BIAS-, BIAS+, OUT-, OUT+ .......-20mA to +150mA
Voltage at VMSET, VBSET, IN+, IN-, BEN+, BEN-, EN, MDIN,
MDOUT, BENOUT, BCMON ...................-0.5V to (VCC + 0.5V)
Voltage at MODSET, BIASSET, VREF, IMAX ........-0.5V to +3.0V
Voltage at OUT-, OUT+, BIAS-, BIAS+ .....+0.3V to (VCC + 0.5V)
Continuous Power Dissipation (TA = +85°C)
24-Pin TQFN, Multilayer Board
(derate 27.8mW/°C above +85°C) ............................1807mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range ............................-55°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-free..............................................................+260°C
Containing lead(Pb) ....................................................+240°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
OPERATING CONDITIONS
PARAMETER
Supply Turn-On Time
Ambient Temperature
Data Rate
Voltage at VMSET, VBSET
Voltage at BCMON
Voltage at MDIN
SYMBOL
CONDITIONS
10% to 90%
MIN
0.001
-40
0
0
0
TYP
MAX
1000
+85
2500
1.4
1.4
2.56
UNITS
ms
°C
Mbps
V
V
V
ELECTRICAL CHARACTERISTICS
(VCC = 3.0V to 3.6V, TA = -40°C to +85°C. Typical values are at VCC = 3.3V, TA = +25°C, IBIAS = 20mA, IMOD = 30mA, unless other-
wise noted.) (Note 1)
PARAMETER
Supply Current
I/O SPECIFICATIONS
LVPECL Differential Input
LVPECL Common-Mode Input
Voltage
SYMBOL
ICC
CONDITIONS
Excluding laser bias and mode currents,
max at IMOD = 85mA, IBIAS = 70mA
VIN
VCM
VIN = (VIN+) - (VIN-)
LVCMOS Output High Voltage
IOH = -100μA
LVCMOS Output Low Voltage
BENOUT Propagation Delay
LVCMOS Input Pullup
IOL = 100μA
Td
CL = 20pF, from BEN zero crossing to 67%
CMOS level
LVCMOS Input Current
LVCMOS Input High Voltage
VIN = 0V or VIN = VCC
LVCMOS Input Low Voltage
BIAS GENERATOR SPECIFICATIONS
Bias Current Range
Bias Current, Burst Off
BIASSET Current Gain
IBIAS
IBIAS, OFF
GBIAS
VBIAS+, VBIAS-  0.6V
BEN = low or EN = high
1mA  IBIAS < 2mA, VBSET = VREF
2mA  IBIAS < 10mA, VBSET = VREF
10mA  IBIAS < 70mA, VBSET = VREF
MIN
200
VCC -
1.49
VCC -
0.2
75
2.0
0.2
1
70
82.5
TYP MAX UNITS
32 51 mA
VCC -
1.32
30
1600
VCC -
VIN / 4
0.2
50
VCC
0.8
mVP-P
V
V
V
ns
k
μA
V
V
70 mA
5 50 μA
88
88 110 mA/mA
88 94.5
2 Maxim Integrated


Part Number MAX3643
Description 155Mbps to 2.5Gbps Burst-Mode Laser Driver
Maker Maxim Integrated Products
Total Page 15 Pages
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