MAX3669E/D Maxim Integrated, MAX3669E/D Datasheet

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MAX3669E/D

Manufacturer Part Number
MAX3669E/D
Description
Laser Drivers DICE SALES DICE12
Manufacturer
Maxim Integrated
Type
Laser Driverr
Datasheet

Specifications of MAX3669E/D

Data Rate
622 Mbps
Operating Supply Voltage
3.14 V to 5.5 V
Supply Current
40 mA
Maximum Operating Temperature
+ 140 C
Package / Case
Dice
Maximum Power Dissipation
929 mW
Minimum Operating Temperature
- 40 C
The MAX3669 is a complete, +3.3V laser driver with auto-
matic power control (APC) circuitry for SDH/SONET appli-
cations up to 622Mbps. It accepts differential PECL
inputs, provides bias and modulation currents, and oper-
ates over a temperature range from -40°C to +85°C.
An APC feedback loop is incorporated to maintain a
constant average optical power over temperature and
lifetime. The wide modulation current range from 5mA to
75mA and bias current of 1mA to 80mA are easy to
program, making this product ideal for use in various
SDH/SONET applications. Two pins are provided to
monitor the current levels in the laser: BIASMON with
current proportional to laser bias current, and MODMON
with current proportional to laser modulation.
The MAX3669 also provides enable control and a failure-
monitor output to indicate when the APC loop is unable
to maintain the average optical power. The MAX3669
is available in 4mm x 4mm 24-pin thin QFN and
5mm x 5mm 32-pin TQFP packages.
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.
622Mbps SDH/SONET Access Nodes
Laser Driver Transmitters
Section Regenerators
CLOCK GEN
MAX3693
SERIALIZER
Laser Driver with Current Monitors and APC
WITH
4:1
+3.3V
124Ω
PECL
84.5Ω
General Description
+3.3V
124Ω
84.5Ω
Applications
DATA+
DATA-
BIASMON
MODMON
+3.3V, 622Mbps SDH/SONET
MAX3669
♦ ♦ +3.3V or +5.0V Single-Supply Operation
♦ ♦ 40mA Supply Current at +3.3V
♦ ♦ Programmable Bias Current from 1mA to 80mA
♦ ♦ Programmable Modulation Current from
♦ ♦ Bias Current and Modulation Current Monitors
♦ ♦ 200ps Rise/Fall Time
♦ ♦ Automatic Average Power Control with Failure
♦ ♦ Complies with ANSI, ITU, and Bellcore
♦ ♦ Enable Control
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
MAX3669ETG
MAX3669ETG+
MAX3669EHJ
MAX3669EHJ+
5mA to 75mA
Monitor
SONET/SDH Specifications
0.1μF
PART
+3.3V
V
Typical Application Circuit
CC
OUT+
OUT-
BIAS
MD
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
R-
6.3Ω
Ordering Information
EVALUATION KIT AVAILABLE
FERRITE
1μF
C
BEAD
R+
20Ω
D
MAX3669
C
R
20Ω
FILT
5pF
FILT
R
D
LASER
PIN-PACKAGE
24 TQFN-EP*
24 TQFN-EP*
32 TQFP
32 TQFP
19-1575; Rev 6; 1/13
Features
C
100pF
MD

Related parts for MAX3669E/D

MAX3669E/D Summary of contents

Page 1

... WITH CLOCK GEN +3.3V 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. +3.3V, 622Mbps SDH/SONET ♦ ♦ +3.3V or +5.0V Single-Supply Operation ♦ ♦ 40mA Supply Current at +3.3V ♦ ♦ Programmable Bias Current from 1mA to 80mA ♦ ♦ Programmable Modulation Current from 5mA to 75mA ♦ ...

Page 2

... 1.49 1. 1mA -480 -50 = 18µA (Note 0 0.3 CC 0.1 + 0.5V) CC MAX UNITS 100 µA ppm/°C +15 % 1600 mV P +10 µA +480 ppm/°C +15 % 1000 µA mA/mA mA/ 0 0.44 V Maxim Integrated ...

Page 3

... Note 8: Input signal is a 622Mbps, 11110000 pattern. Note 9: PWD = (wider pulse – narrower pulse DATA+ DATA- (DATA+) - (DATA OUT Figure 1. Required Input Signal and Output Polarity Maxim Integrated +3.3V, 622Mbps SDH/SONET = -40°C to +85°C, unless otherwise noted. Typical values are CONDITIONS I (Note 6) MOD ENABLE = low (Note 2) ...

Page 4

... PATTERN = 75mA MOD 200ps/div MODULATION CURRENT vs. MODULATION SET RESISTOR 100 10 1 100 0 MODSET SUPPLY CURRENT vs. TEMPERATURE 5. 48mA BIAS I = 27mA MOD -40 -15 10 TEMPERATURE (°C) = 75mA CID 100 1000 (kΩ 3. Maxim Integrated ...

Page 5

... MODULATION CURRENT STABILITY (ppm/°C) RATIO +85° -40° Maxim Integrated +3.3V, 622Mbps SDH/SONET Typical Operating Characteristics (continued) 175 275 375 475 575 vs. I MOD MODMON T = +25° (mA) MOD MAX3669 ...

Page 6

... This resistor controls the bias-current level when the APC loop is not used. Exposed Pad (TQFN only). The exposed paddle must be soldered to ground. Pin Description FUNCTION flows into this pad when the input signal is MOD flows into this pad when the input signal is MOD Maxim Integrated ...

Page 7

... These transients and the laser for- ward voltage leave insufficient headroom for the proper operation of the laser driver if the modulation output is DC-coupled to the laser diode. To solve this problem, the MAX3669’s modulation output is designed to be Maxim Integrated +3.3V, 622Mbps SDH/SONET V CC 100kΩ ...

Page 8

... D LASER (0.67) MODL MOD = 5.0Ω and a laser resistance of approximately D that corresponds to MODSET Programming the Bias Current BIASMAX , the modula- ) also depends ), the D ), and the laser <<C ) into the D ⎤ ⎥ ) ⎥ ⎦ LASER resistor. To Maxim Integrated ...

Page 9

... I will have an effect on PDJ MOD important that this time constant produce minimum droop for long consecutive bit streams. Maxim Integrated +3.3V, 622Mbps SDH/SONET Referring to Figure 4, the droop resulting from long time that corre- periods without transitions can be represented by the ...

Page 10

... MODMON ⎝ ⎠ I MOD Modulation Currents Exceeding 50mA V CC 10Ω FERRITE BEADS OUT- OUT MAX3669 1μF BIAS FERRITE BEAD MD should BIASMAX BIASMON - 1.6V). CC ⎞ ⎟ ⎠ MODMON - 1V Such FILT D 5Ω C FILT 100pF Maxim Integrated ...

Page 11

... MODMON (5mm x 5mm) Maxim Integrated +3.3V, 622Mbps SDH/SONET Using the MAX3669 laser driver alone does not ensure that a transmitter design is compliant with IEC 825. The entire transmitter circuit and component selections must be considered. Customers must determine the level of fault tolerance required by their application, recognizing ...

Page 12

... RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE PACKAGE OUTLINE TYPE CODE TQFP H32+2F 21-0110 TQFN-EP T2444+3 21-0139 LAND NO. PATTERN NO. 90-0149 90-0021 Maxim Integrated ...

Page 13

... Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed ...

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