MAX3766 Evaluation MAX3766 evaluation kit) assembled, surface-mou

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MAX3766 Evaluation MAX3766 evaluation kit) assembled, surface-mou

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MAX3766 Evaluation
MAX3766 evaluation kit) assembled, surface-mount demonstration board that provides easy optical electrical evaluation MAX3766 622Mbps laser driver.
_Features
Adjustable Modulation Temperature Coefficient Automatic Safety Reset Delay with MAX809M Automatic Power Control Evaluation Electrical Optical Configuration Dual Layout Option Single Board Fully Assembled Tested
Evaluates: MAX3766
Ordering Information
PART MAX3766EVKIT TEMP. RANGE -40°C +85°C PIN-PACKAGE MAX3766EEP
Component List
DESIGNATION C12, C10, C11, C15, SOCKETS IN+, IN-, IOUTJU1, JU3, JU1, JU3, JU4, DESCRIPTION Ferrite bead Murata BLM11A601S 10µF ±10%, tantalum TAJC106K016 0.01µF 10%, ceramic capacitors 0.1µF 10%, ceramic capacitors INSTALL 15pF 10%, ceramic capacitor 10%, ceramic AVX0805ZC105k sockets Digi-Key ED5042-ND 2-pin header (0.1" center) Digi-Key S1012-36-ND connectors (edge mount) E.F. Johnson 142-0701-801 Digi-Key J502-ND 3-pin headers (0.1" centers) Digi-Key S1012-36-ND Shunts Digi-Key S9000-ND R10, R15, +5V, None None DESIGNATION DESCRIPTION INSTALL transistor Zetex FMMT591, SOT23 jumper variable resistors Bourns 3296 221, resistors resistor 100k variable resistors Bourns 3296 5.1k, resistors 68.1, resistors resistor 24.9, resistor 182, resistors 33.2, resistor 100k, resistor 49.9, resistor MAX3766EEP, QSOP-20 MAX495ESA, SOIC-8 MAX809MEUR-T Test points Mouser 151-203 MAX3766 circuit board (rev. MAX3766 data sheet
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 408-737-7600 ext. 3468.
MAX3766 Evaluation Evaluates: MAX3766
Component Suppliers
SUPPLIER Murata Zetex PHONE (806) 946-0690 (770) 436-1300 (516) 543-7100 (803) 626-3123 (770) 436-3030 (516) 864-7630
_Electrical Quick Start
Ensure that solder bridges shorted, that solder bridge open. Install shunt JU5. Install shunt between pins Install shunt between pins (all fail conditions ignored). Remove shunt from JU4. Turn potentiometer counterclockwise (minimum tempco). Also turn RBIASMAX potentiometer clockwise Connect terminated oscilloscope from cable IOUT-. oscilloscope vertical gain 100mV/div. Apply 500mV minimum differential input signal (J1) (J2). Power board with supply test pins. current limit 300mA. Adjust RMODSET until signal appears oscilloscope. conversion gain from MAX3766 modulation current oscilloscope output 0.08mA/mV; therefore 750mV equals modulation current 60mA.
Turn RMODSET counterclockwise (minimum modulation current). Turn RPOWERSET counterclockwise 100k (minimum monitor diode (MD) current). Insert TO-46 packaged laser into Power board with supply test points. current limit 300mA. Connect cable from IOUT- terminated oscilloscope input. Apply 500mV minimum differential input signal (J1) (J2). Adjust RPOWERSET RMODSET clockwise until desired average optical power amplitude displayed oscilloscope attached optical-to-electrical converter. caution modulation current could exceed laser's damage rating.)
Compact Layout
second, more compact layout provided this board. designed optical evaluation only. schematic included (Figure components supplied. High-speed performance improved with compact layout.
Laser Safety
Using MAX3766 laser driver alone does ensure that transmitter design compliant with safety requirements. entire transmitter circuit component selections must considered. Each customer must determine level fault tolerance required their application, recognizing that Maxim products designed authorized components systems intended surgical implant into body, applications intended support sustain life, other application where failure Maxim product could create situation where personal injury death occur.
Optical Quick Start
Ensure that solder bridges open. Ensure that solder bridge shorted. Install shunt JU4, between pins Install shunt between pins (all fail conditions ignored). Turn potentiometer counterclockwise (minimum tempco). Adjust RBIASMAX potentiometer safe maximum biasing level laser diode used this evaluation. Measure RBIASMAX from VREF1 BIASMAX without power applied board. (From MAX3766 data sheet estimated that sets about 40mA maximum laser bias current.)
MAX3766 Evaluation Evaluates: MAX3766
Table Adjustment Control Descriptions (review Quick Start first)
CONTROL NAME Laser Diode FUNCTION This socket laser TO-46 header (customer supplied). When shunt placed pins MAX3766's safety features enabled. MAX809M ensures that failures start-up ignored until voltage level MAX809M detected VCC. This allows MAX3766 power without generating safety shutdown. Shunting pins disables safety shutdown. This solder bridge should shorted only electrical evaluation when using automatic power control. Selects which layout supply with power. Shunt pins power (larger layout). Shunt pins power (compact layout). Allows board switch between optical monitor diode current (shunt pins electrically-emulated monitor diode current (shunt pins Enables disables MAX3766. When shunted, part enabled. This solder bridge should shorted. This solder bridge should open optical evaluation shorted electrical evaluation. When using electrically emulated monitor diode current, sets ratio laser current monitor diode current. sets modulation current temperature compensation, minimum tempco (0ppm/°C) 100k maximum tempco (~5600ppm/°C). When open-loop mode (automatic power control used), this resistance sets laser bias current maximum bias). When closed-loop mode, sets maximum bias current available with automatic power control. Sets monitor diode reference current closed-loop condition (automatic power control engaged). MAX3766 data sheet selection RPOWERSET. Sets modulation current. maximum modulation current.
SAFETY
VCC/VCCA ENABLE COUPLING
RBIASMAX
RPOWERSET RMODSET
Evaluates: MAX3766
COUPLING 0.01µF VREF1 RPOWERSET VBIAS
MAX495
MAX3766 Evaluation
Figure MAX3766 Schematic
VCCA OPEN 10µF RBIASMAX BIASMAX REF1 POWERSET OPEN OUTVCCOUT FAIL SAFETY FAIL 15pF 5.1k 0.1µF ENABLE OPEN 0.01µF IOUT49.9 0.1µF 33.2 24.9 0.01µF LASER FERRITE 0.1µF PWRSET 0.1µF BIASMAX REF2 GNDOUT BIAS OUT+ 100k 100k
VREF2 RMODSET
MAX3766
68.1 MODSET
68.1
0.1µF
0.1µF
MAX809M
RESET 5.1k 100k
MAX3766 Evaluation Evaluates: MAX3766
BIASMAX REF2
REF1 POWERSET
VCCA VCCA 24.9 VCCA 5.1k IP10 15pF 24.9, 0.01µF OPEN FERRITE LASER VCCA 0.1µF
GNDOUT
VCCA 68.1
MAX3766
BIAS OUT+ OUTVCCOUT FAIL SAFETY
0.1µF
VCCA
0.01µF ENABLE
68.1
Figure MAX3766 Compact Layout (components supplied, values reference only)
Compact Layout Component List (Not Installed Supplied)
DESIGNATION C13, C22, SOCKET DESCRIPTION Ferrite bead Murata BLM11A601S 0.01µF capacitors capacitor 15pF capacitor 0.1µF capacitors INSTALL sockets Digi ED5042-ND connector (edge mount) E.F. Johnson 142-0701-801 Digi J502-ND DESIGNATION R19, R22, R23, R25, R26, R31, DESCRIPTION Resistors (MAX3766 data sheet) 68.1, resistors 182, resistors 5.1k, resistor resistor 24.9, resistors MAX3766EEP QSOP-20
MAX3766 Evaluation Evaluates: MAX3766
1.0"
1.0"
Figure MAX3766 Component Placement Guide- Component Side
Figure MAX3766 Board Layout-Component Side
1.0"
Figure MAX3766 Board Layout-Ground Plane
MAX3766 Evaluation Evaluates: MAX3766
1.0"
1.0"
Figure MAX3766 Board Layout-Power Layer
Figure MAX3766 Board Layout-Solder Side
MAX3766 Evaluation Evaluates: MAX3766
NOTES
Maxim makes warranty, representation guarantee regarding suitability products particular purpose, does Maxim assume liability arising application product circuit specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters vary different applications. operating parameters, including "typicals" must validated each customer application customer's technical experts. Maxim products designed, intended authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Maxim product could create situation where personal injury death occur.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600
Printed registered trademark Maxim Integrated Products.
1998 Maxim Integrated Products

MAX3766 Evaluation MAX3766 evaluation kit) assembled, surface-mou

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