MAX3643 Maxim Integrated Products, MAX3643 Datasheet
MAX3643
Manufacturer Part Number
MAX3643
Description
Burst Mode Laser Driver
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX3643.pdf
(15 pages)
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The MAX3643 burst-mode laser driver provides bias
and modulation current drive for PON burst-mode ONT
applications. 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 (out-
put off) condition to full on-condition in less than 2ns.
When BEN is inactive, typical modulation and bias cur-
rents 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 0; 11/05
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.
155/622/1244Mbps A/B/GPON ONT Modules
1.25Gbps IEEE EPON ONT Modules
3kΩ
IN+
IN-
EN
BEN+
BEN-
IMAX
________________________________________________________________ Maxim Integrated Products
1kΩ
BCMON
General Description
VREF
VMSET
Applications
MAX3643
1kΩ
MODSET
+3.3V
VBSET
FILTER
BIASSET
1kΩ
V
BENOUT
CC
Burst-Mode Laser Driver
MDOUT
BIAS+
OUT+
BIAS-
MDIN
o 10mA to 85mA Modulation Current
o 1mA to 70mA Bias Current
o Monitor Diode Sample and Hold
o 45ps Output Transition Time
o 2ns Turn-On/-Off Time
o Reference Voltage Generator
o LVPECL High-Speed Inputs (Data, Burst Enable)
OUT-
GND
*EP = Exposed paddle.
+Denotes lead-free package.
Pin Configuration appears at end of data sheet.
MAX3643ETG
MAX3643ETG+
ANALOG OUT
ANALOG OUT
ANALOG IN
CONTROL
PART
CONTROLLER
START CONVERT
15Ω
10Ω
10Ω
15Ω
ANALOG IN
ANALOG IN
Typical Application Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
CONTINUOUS
OPERATION
V
CC
1kΩ
Ordering Information
27nH
R
C
COMP
COMP
+3.3V
PIN-
PACKAGE
24 TQFN-EP*
24 TQFN-EP*
24Ω
Features
0.1µF
T2444-3
T2444-3
CODE
PKG
1
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