MAX3643ETG+T Maxim Integrated Products, MAX3643ETG+T Datasheet

IC LASR DRVR 2.5GBPS 3.6V 24TQFN

MAX3643ETG+T

Manufacturer Part Number
MAX3643ETG+T
Description
IC LASR DRVR 2.5GBPS 3.6V 24TQFN
Manufacturer
Maxim Integrated Products
Type
Laser Diode Driver (Fiber Optic)r
Datasheet

Specifications of MAX3643ETG+T

Data Rate
2.5Gbps
Number Of Channels
1
Voltage - Supply
3 V ~ 3.6 V
Current - Supply
32mA
Current - Modulation
85mA
Current - Bias
70mA
Operating Temperature
-40°C ~ 85°C
Package / Case
24-TQFN Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-3848; Rev 2; 7/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
155Mbps to 2.5Gbps Burst-Mode Laser Driver
A/B/G/XGPON ONT Modules Up to 2.5Gbps
1.25Gbps IEEE EPON ONT Modules
CONTROL
SOURCE
SERIAL
BURST
DATA
________________________________________________________________ Maxim Integrated Products
Z
Z
Z
Z
General Description
0
0
0
0
= 50Ω
= 50Ω
= 50Ω
= 50Ω
130Ω
130Ω
82Ω
82Ω
+3.3V
130Ω
+3.3V
130Ω
82Ω
82Ω
Applications
IN+
IN-
BEN+
BEN-
3kΩ
+3.3V
FILTER
MAX3643
1kΩ
V
CC
♦ 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)
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed paddle.
Pin Configuration appears at end of data sheet.
MAX3643ETG
MAX3643ETG+
PART
MDOUT
1kΩ
BIAS+
BIAS-
MDIN
OUT+
OUT-
Typical Application Circuit
5.6Ω
5.6Ω
15Ω
10Ω
15Ω
MON1
BEN
BIAS
MOD
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
+3.3V
75Ω
PON TRIPLEXER AND SFP
27pF
+3.3V
10nH
CONTROLLER
DS1875
1kΩ
10pF
BMD
PIN-PACKAGE
24 TQFN-EP*
24 TQFN-EP*
Features
1

Related parts for MAX3643ETG+T

MAX3643ETG+T Summary of contents

Page 1

... Z = 50Ω 0 82Ω 82Ω ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ 10mA to 85mA Modulation Current ♦ 1mA to 70mA Bias Current ♦ Monitor Diode Sample and Hold ♦ ...

Page 2

Burst-Mode Laser Driver ABSOLUTE MAXIMUM RATINGS Supply Voltage V ..............................................-0.5V to +4.0V CC 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 ...

Page 3

Burst-Mode Laser Driver ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V -40°C to +85°C. Typical values are otherwise noted.) (Note 1) PARAMETER SYMBOL BIASSET Current Gain G BIASSET Current Gain Stability ...

Page 4

Burst-Mode Laser Driver ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V -40°C to +85°C. Typical values are otherwise noted.) (Note 1) PARAMETER SYMBOL Sampling Error BANDGAP VOLTAGE REFERENCE SPECIFICATIONS VREF Output ...

Page 5

Burst-Mode Laser Driver (Typical values are +3.3V noted.) OPTICAL EYE DIAGRAM (155.52Mbps, 117MHz FILTER, 23 PATTERN = PRBS) MAX3643 toc01 EXCELIGHT SLT2886-LR LASER AVERAGE OPTICAL POWER = -6dBm ...

Page 6

Burst-Mode Laser Driver (Typical values are +3.3V noted.) DETERMINISTIC JITTER vs. MODULATION AMPLITUDE MOD I ...

Page 7

Burst-Mode Laser Driver (Typical values are +3.3V noted.) I vs. VBSET BIAS (R = 1kΩ) BIASSET 0.2 0.6 0.8 0.4 ...

Page 8

Burst-Mode Laser Driver PIN NAME 1 V Analog Supply Voltage CCA 2 IN+ Noninverted Data Input, LVPECL Compatible 3 IN- Inverted Data Input, LVPECL Compatible 4 V Signal Supply Voltage CCS 5 BEN+ Noninverted Burst-Enable Input, LVPECL ...

Page 9

Burst-Mode Laser Driver MAX3643 IN+ LVPECL IN- BEN+ LVPECL BEN- IMAX LIMIT CMOS 1.2V R MOD VREF VMSET MODSET VBSET Figure 1. Functional Diagram _______________________________________________________________________________________ CMOS LIMIT ...

Page 10

Burst-Mode Laser Driver Detailed Description The MAX3643 laser driver includes a bias current gen- erator, bias current monitor, modulation current genera- tor, laser drive outputs, and monitor diode sample and hold. LVPECL-compatible inputs are provided for both ...

Page 11

Burst-Mode Laser Driver 3μs 1.2V Figure 2. Sample-and-Hold Timing Diagram An LVCMOS input, EN, is provided to disable both bias and modulation currents under external control. The maximum time to disable laser current with the EN con- ...

Page 12

Burst-Mode Laser Driver This approach can also be used for a conventional volt- age DAC output, if desired. In all cases, the voltage at MODSET must be kept ≤ 1.4V, which limits the range of acceptable values ...

Page 13

Burst-Mode Laser Driver Applications Information Running Burst-Enable Single-Ended See Figure 5 for setting up the single-ended LVTTL or LVCMOS biasing for burst enable. Layout Considerations To minimize inductance, keep the connections between the MAX3643 output pins and ...

Page 14

Burst-Mode Laser Driver Pin Configuration TOP VIEW GND 19 MODSET 20 VMSET 21 MAX3643 VREF 22 VBSET 23 *EP BIASSET THIN QFN (4mm x 4mm) ...

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 © 2010 Maxim Integrated Products ...

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