MAX3668EHJ+T ,+3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power Controlapplications up to 622Mbps. It accepts differentialPECL inputs, provides bias and modulation curren ..
MAX3668EHJ+T ,+3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power ControlApplicationsMAX3668EHJ+ -40°C to +85°C 32 TQFP (5mm x 5mm)622Mbps SDH/SONET Access NodesMAX3668E/D ..
MAX3669EHJ ,+3.3V / 622Mbps SDH/SONET Laser Driver with Current Monitors and APCELECTRICAL CHARACTERISTICS(V = +3.14V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical ..
MAX3669EHJ ,+3.3V / 622Mbps SDH/SONET Laser Driver with Current Monitors and APCApplicationsNote A: Dice are designed to operate over a -40°C to +140°C622Mbps SDH/SONET Access Nod ..
MAX3669EHJ+ ,+3.3V, 622Mbps SDH/SONET Laser Driver with Current Monitors and APCFeaturesThe MAX3669 is a complete, +3.3V laser driver with auto-♦♦ +3.3V or +5.0V Single-Supply Ope ..
MAX3669EHJ+T ,+3.3V, 622Mbps SDH/SONET Laser Driver with Current Monitors and APCApplicationsMAX3669EHJ -40°C to +85°C 32 TQFP 622Mbps SDH/SONET Access NodesMAX3669EHJ+ -40°C to +8 ..
MAX7312AAG+ ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionApplications(4mm x 4mm)Servers/BladesMAX7312AUG -40°C to +125°C 24 TSSOP —RAID SystemsSMBus is a tr ..
MAX7312AAG+ ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionELECTRICAL CHARACTERISTICS+ +(V = 2V to 5.5V, T = -40°C to +125°C, unless otherwise noted. Typical ..
MAX7312AAG+T ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protectionapplications. The MAX7312 consists of input port♦ 5V Overvoltage Tolerant I/Osregisters, output p ..
MAX7312ATG ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionApplicationsMAX7312AUG -40°C to +125°C 24 TSSOPServers/BladesSMBus is a trademark of Intel Corp.RAI ..
MAX7312ATG+T ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionFeatures2The MAX7312 2-wire-interfaced expander provides 16-bit ♦ 400kbps I C-Compatible Serial Int ..
MAX7312AUG ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protectionapplications. The MAX7312 consists of input port 5V Overvoltage Tolerant I/Osregisters, output por ..
MAX3668EHJ+-MAX3668EHJ+T
+3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power Control
General DescriptionThe MAX3668 is a complete, +3.3V laser driver with
automatic power control (APC) circuitry for SDH/SONET
applications up to 622Mbps. It accepts differential
PECL inputs, provides bias and modulation currents,
and operates over a temperature range of -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 of 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.
The MAX3668 also provides enable control and a failure-
monitor output to indicate when the APC loop is unable
to maintain the average optical power. The MAX3668 is
available in a 5mm 32-pin TQFP package as well as in
dice.
Applications622Mbps SDH/SONET Access Nodes
Laser Driver Transmitters
Section Regenerators
FeaturesSingle +3.3V or +5.0V Operation38mA Supply Current at +3.3VProgrammable Modulation Current from
5mA to 75mAProgrammable Bias Current from 1mA to 80mARise/Fall Time <200psAutomatic Average Power Control with Failure
MonitorComplies with ANSI, ITU, and Bellcore
SONET/SDH SpecificationsEnable Control
MAX3668
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power ControlDATA+
BIASMAXMODSETAPCSETCAPC
FAIL
ENABLE
GNDMD
BIAS
OUT+
0.1μF
LASER
OUT-
CMD
1000pF
RFILT
20Ω
CFILT
5pF
1.0μF
20Ω
6.3Ω
FERRITE
BEAD
VCC
DATA-
PECL
+3.3V+3.3V
82Ω82Ω
130Ω130Ω
4:1
SERIALIZER
WITH
CLOCK GEN
MAX3693
MAX3668
Typical Operating Circuit19-4799; Rev 4; 2/05
Ordering Information
Pin Configuration appears at end of data sheet.
Note:Dice are designed to operate over a -40°C to +140°C
junction temperature (Tj) range, but are tested and guaranteed
at TA= +25°C.
*Contact factory for availability.
+Denotes lead-free package.
†C0
PARTTEMP RANGEPIN-PACKAGEMAX3668EHJ-40°C to +85°C32 TQFP (5mm x 5mm)
MAX3668EHJ+-40°C to +85°C32 TQFP (5mm x 5mm)
MAX3668E/DNoteDice*
MAX3668
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power Control
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +3.14V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V, TA= +25°C.) (Note 1)
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.
Supply Voltage, VCC.............................................-0.5V to +7.0V
Current into BIAS............................................-20mA to +150mA
Current into OUT+, OUT-...............................-20mA to +100mA
Current into MD....................................................-5mA to +5mA
Voltage at DATA+, DATA-, ENABLE,
FAIL.......................................................-0.5V to (VCC+ 0.5V)
Voltage at OUT+, OUT-.............................+1.5V to (VCC + 1.5V)
Voltage at MODSET, APCSET, BIASMAX,
CAPC...............................................................-0.5V to +3.0V
Voltage at BIAS.........................................+1.0V to (VCC + 0.5V)
Continuous Power Dissipation (TA= +85°C)
32-Pin TQFP (derate 14.3mW/°C above +85°C)........ 929mW
Operating Junction Temperature Range...........-55°C to +150°C
Processing Temperature (Die).........................................+400°C
Storage Temperature Range ...........................-65°C to +165°C
Lead Temperature (soldering, 10s) ................................+300°C
ENABLE = low (Note 3)
VBIAS= VCC - 1.6V
(Note 2)
Sinking 100µA
Sourcing 50µA
(Note 4)
APC open loop
APC open loop
Figure 1
PECL compatible
CONDITIONS0.10.44VOLTTL Output Low Voltage
(FAIL)2.4VCC - 0.3VCCVOHTTL Output High Voltage
(FAIL)0.8VILTTL Input Low Voltage2.0VIHTTL Input High Voltage0.8VMDMonitor Diode Input Voltage
(MDPin)100Bias Off Current180IBIAS3860Supply Current
Bias Current Range181000IMDDC Monitor Diode Current-1515Monitor Diode Current
Absolute Accuracy
ppm/°C-48010480Monitor Diode Current Stability-110IINDATA+, DATA- Input Current
ppm/°C390Bias Current Stability-1515Bias Current Absolute Accuracy
mVp-p2001600VIDDifferential Input VoltageVCC -VCC -VCC -
1.491.32VID/4VICMCommon-Mode Input Voltage
UNITSMINTYPMAXSYMBOLPARAMETERIBIAS= 80mA
IBIAS= 1mA920
IMD= 1mA
IMD= 18µA (Note 5)70
MAX3668
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power Control
AC ELECTRICAL CHARACTERISTICS(VCC= +3.14V to +5.5V, load as shown in Figure 2, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V,= +25°C.) (Note 6)
Note 1:Characteristics at -40°C are guaranteed by design and characterization. Dice are tested at TA= +25°C only.
Note 2:Tested with RMODSET= 5.11kΩ(IMOD≈38mA), RBIASMAX= 4.56kΩ(IBIAS≈52mA), excluding IBIASand IMOD.
Note 3:Both the bias and modulation currents will be disabled if any of the current set pins are shorted to ground.
Note 4:This assumes that the laser to monitor diode transfer function does not change with temperature.
Note 5:See Typical Operating Characteristicsfor worst-case distributions.
Note 6:ACcharacteristics are guaranteed by design and characterization.
Note 7:Total IMODout of OUT+. Refer to the Design Procedure for information regarding current delivered to the laser.
Note 8:Input signal is a 622Mbps, 213- 1 PRBS with 80 inserted zeros.
Note 9:Input signal is a 622Mbps, 11110000 pattern.
Note 10:PWD = (wider pulse – narrower pulse) / 2.IMOD= 75mA
ENABLE = low (Note 3)
(Note 7)
Open loop
20% to 80%, = 10Ω||20Ωload
CONDITIONSppm/°C-620175620Modulation Current Stability200575IMODModulation Current Range
Modulation Off Current 250Enable/Start-Up Delay 70155Pulse-Width Distortion
(peak-to-peak)-1515Modulation Current Absolute
Accuracy
100200tR/tFOutput Rise/Fall Timeps230375
UNITSMINTYPMAXSYMBOLPARAMETER(Notes 9, 10)IMOD= 5mA
DATA+
DATA-
(DATA+) -
(DATA-)
IOUT+
100mV MIN
800mV MAX
200mVp-p MIN
1600mVp-p MAX
IMOD
Figure 1. Required Input Signal and Output Polarity
IMOD= 5mA (Note 5)300
VCC
15Ω
10Ω
1.0μF
1.0μF
12.4Ω
20Ω
OUT-
OUT+
BIAS
20Ω
50Ω
OSCILLOSCOPEMAX3668
VCC
Figure 2. Output Termination for Characterization
(Note 8)ps100Jitter Generation (peak-to-peak)
IMOD= 75mA
IMOD= 5mA
Bits80CIDMaximum ConsecutiveIdentical
Digits at 622Mbps
IMOD= 75mA10135
EYE DIAGRAM
(IMOD = 35mA)MAX3668 TOC02
200ps/div
PATTERN = 213 - 1 + 80 CID
IMOD = 35mA
622Mbps
EYE DIAGRAM
(IMOD = 75mA)MAX3668 TOC03
200ps/div
PATTERN = 213 - 1 + 80 CID
IMOD = 75mA
622Mbps
EYE DIAGRAM
(622Mbps, 1300nm LASER
WITH 467MHz FILTER)MAX3668 TOC01
193ps/div
223 - 1 PRBS
MONITOR DIODE CURRENT
vs. APC SET RESISTOR
MAX3668 TOC04
RAPCSET (kΩ)
IMD
(mA)
BIAS CURRENT vs.
MAXIMUM BIAS SET RESISTOR
MAX3668 TOC05
RBIASMAX (kΩ)
IBIAS
(mA)
MODULATION CURRENT
vs. MODULATION SET RESISTOR
MAX3688 TOC06
RMODSET (kΩ)
IMOD
(mA)1
RANDOM JITTER
vs. MODULATON CURRENT
MAX3668 TOC07
IMOD (mA)
RANDOM JITTER (ps p-p)
INCLUDES RANDOM JITTER
DUE TO MEASUREMENT
EQUIPMENT
PULSE-WIDTH DISTORTION
vs. MODULATION CURRENT
MAX3668 TOC08
IMOD (mA)
PWD (ps)
SUPPLY CURRENT
vs. TEMPERATURE
MAX3668 TOC09
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
VCC = +3.3V
VCC = +5.0V
IBIAS = 48mA
IMOD = 33mA
MAX3668
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power Control
Typical Operating Characteristics (VCC= +3.3V, TA= +25°C, unless otherwise noted.)
MAX3668
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power ControlAVAILABLE BIAS CURRENT
vs. MAXIMUM BIAS SET RESISTOR
MAX3668 TOC10
RBIAS (kΩ)
BIAS CURRENT (mA)
VCC = +3.3V
VCC = +3.3V, + 5V
CLOSED-LOOP OPERATION
VCC = +5V
DISTRIBUTION OF MODULATION CURRENT
STABILITY (WORST CASE)
MAX3668-11
MODULATION DIODE CURRENT STABILITY (ppm/°C)
PERCENT OF UNITS (%)
TA = -40°C TO +85°C
IMOD = 5mA
DISTRIBUTION OF MONITOR DIODE CURRENT
STABILITY (WORST CASE)
MAX3668-12
MONITOR DIODE CURRENT STABILITY (ppm/°C)
PERCENT OF UNITS (%)
TA = -40°C TO +85°C
IMD = 18μA
Typical Operating Characteristics (continued)(VCC= +3.3V, TA= +25°C, unless otherwise noted.)
Pin Description
NAMEFUNCTION1, 2, 6, 15,
17, 20, 24VCCPositive Supply VoltageAPCSET
APC Set Resistor. A resistor connected from this pad to ground sets the desired average opti-
cal power. The resulting current is equal to the desired DC monitor diode current. Connect a
100kΩresistor from this pad to ground if APC is not used.
PINDATA+Positive PECL Data InputDATA-Negative PECL Data InputBIASMAX
Maximum Bias Set Resistor. A resistor from this pad to ground sets the maximum laser bias
current. The APC function can subtract from this maximum value but cannot add to it. This
resistor controls the bias-current level when the APC loop is not used.MODSETModulation Set Resistor. A resistor from this pad to ground sets the laser modulation current.
5, 7, 8, 10,
14, 21, 22, 30GNDGround
12, 13, 26,
27, 28N.C.No Connection. Leave unconnected.FAILTTL Output. Indicates APC failure when low. Internally pulled high through a 6kΩresistor.ENABLETTL/CMOS Enable Input. High for normal operation, low to disable laser bias and modulation
currents. Internally pulled high.BIASLaser Bias Current Output. Isolate from laser with a ferrite bead.OUT-Negative Modulation Current Output. IMODflows into this pad when the input signal is low.
Connect this pad to VCCthrough a 6.3Ωresistor.OUT+Positive Modulation Current Output. IMODflows into this pad when the input signal is high.
Connect this pad to AC coupling network.MDMonitor Photodiode Connection. Connect this pad to the monitor photodiode anode. A capaci-
tor to ground is required to filter high-speed AC monitor photocurrent.CAPCAPC Compensation Capacitor. A 0.1µF capacitor connected from this pad to ground controls
the dominant pole of the automatic power control (APC) feedback loop.
