MAX3770 Evaluation MAX3770 evaluation kit) simplifies evaluation

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MAX3770 Evaluation MAX3770 evaluation kit) simplifies evaluation

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MAX3770 Evaluation
MAX3770 evaluation kit) simplifies evaluation MAX3770/MAX3771 Fibre Channel data repeater ICs. This fully assembled factory-tested enables testing devices' functions. connectors controlled impedance transmission lines provided differential data inputs outputs, well voltage-controlled oscillator (VCO) clock outputs. test/calibration path enables user calibrate test equipment accurate measurements taken. On-board impedance transformation networks simplify interfacing with standard test equipment. Jumpers allow user enable disable data repeater frequency lock indicator VCO's clock outputs. frequency lock monitored visually with provided through LOCK test point. Fully Assembled Tested Frequency Lock Indicator On-Board Impedance Conversion Networks Interfacing with Standard Test Equipment Test Signal Path Board Characterization Jitter Calibration Jumpers Controlling Clock Output Frequency Lock Indicator
Features
Evaluates: MAX3770/MAX3771
Ordering Information
PART MAX3770EVKIT TEMP. RANGE +70°C PACKAGE QSOP
Component List
DESIGNATION C1-C6, C12-C15 J1-J6, J10-J13 None LED1 LOCK, VCC, R11, R12, R14, R13, None None DESCRIPTION 0.1µF ±10%, (min) ceramic caps 0.22µF ±10%, (min) ceramic 2.2µF ±10%, (min) ceramic 33µF ±10%, (min) tantalum connectors (edge mount) 3-pin headers (0.1in centers) Shunts 56nH inductor Coilcraft 0805HT-56NTKBC package 1-pin headers (0.1in centers)
Note: evaluate MAX3771, order MAX3770 obtain samples MAX3771.
Component Suppliers
SUPPLIER Coilcraft PHONE 847-639-6400 847-639-1469
Note: Please indicate that using MAX3770 when contacting this component supplier.
Detailed Description
Quick Start
Connect differential signal source input IN-. differential signal amplitude 500mV peak peak (p-p). input signal data rate 2.125Gbps MAX3770 1.062Gbps MAX3771. clock output desired, connect shunt across pins (CLKEN) enable clock output. Shunt pins clock output desired (Tables Enable frequency lock indicator shunting pins (LOCKEN). Shunt pins lock indication desired. Connect data clock outputs (OUT+, OUT-, CLK+, CLK-) through matched-impedance cables oscilloscope with minimum bandwidth 3GHz.
43.2 resistors
resistors resistor MAX3770CEE MAX3771CEE 16-pin QSOP MAX3770/MAX3771 circuit board MAX3770/MAX3771 data sheet
Maxim Integrated Products
free samples latest literature, visit www.maxim-ic.com phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX3770 Evaluation Evaluates: MAX3770/MAX3771
Table Adjustments Control Descriptions*
COMPONENT NAME LOCKEN FUNCTION Enables/disables frequency lock indicator. Shunt between pins disable frequency lock indicator; shunt between pins enable frequency lock indicator. Enables/disables PLL's clock output. Shunt between pins disable clock output; shunt between pins enable clock output. Provides visual indication when frequency locked. illuminated when frequency locked. Frequency lock indicator test point. high indicates frequency locked; indicates lost lock.
LED1
CLKEN LOCK LOCK
*See Quick Start first. Power with +3.3V supply. scope, differential amplitude signal should between 300mVp-p 600mVp-p.
Table Control Functions
LOCKEN (J8) CLKEN (J9) LOCK Disabled Disabled Enabled Enabled CLOCK Disabled Enabled Disabled Enabled
Control Functions
MAX3770 equipped with 3-pin headers that allow user enable disable outputs clock frequency lock indicator. Header connected ground, connected device's control pin, connected VCC. Table gives output states obtained when control pins forced high low. Program shunting pins program shunting pins
Test/Calibration Circuit
test/calibration signal path contains same type connectors, transmission line layout, impedance-transformation networks provided data repeater IC's signal I/Os. test/calibration circuit used board characterization jitter calibration.
Input Output Impedance Conversion
MAX3770/MAX3771 designed operate environments-the default most Fibre Channel applications. convenient interface with standard test equipment, MAX3770 equipped with impedance-transformation resistor networks inputs outputs 50). impedancetransformation networks also introduce signal attenuation. input signal attenuated factor 0.64, output signal attenuated factor 0.43. example, 600mV differential signal applied input terminals MAX3770 will produce 381mV differential input signal across IC's input pins. 335mV differential signal observed output terminals MAX3770 kit, IC's actual output 780mV differential signal.
Layout Considerations
MAX3770/MAX3771 performance greatly affected circuit board layout design. good highfrequency design techniques, including minimizing ground inductances using fixed-impedance transmission lines data clock signals.
MAX3770 Evaluation Evaluates: MAX3770/MAX3771
LOCK
LOCK
0.22µF 0.1µF 0.1µF 43.2 43.2 FIL+ FILGND INGND LOCK
43.2
0.1µF CLK+ 0.1µF CLK-
MAX3770 MAX3771
CLK+ CLKCLKEN OUT+ OUTLOCKEN
43.2
43.2
0.1µF OUT+ 0.1µF OUT-
43.2 CLKEN
LOCKEN
56nH 33µF 0.1µF TEST2+ 0.1µF TEST2C14 0.1µF 2.2µF 0.1µF 0.1µF
43.2
43.2
TEST1+ 0.1µF TEST1-
43.2
43.2
Figure MAX3770 Schematic
MAX3770 Evaluation Evaluates: MAX3770/MAX3771
1.0" 1.0"
1.0"
Figure MAX3770 Component Placement Guide- Component Side
Figure MAX3770 Board Layout-Component Side
MAX3770 Evaluation Evaluates: MAX3770/MAX3771
1.0"
1.0"
Figure MAX3770 Board Layout-Solder Side
Figure MAX3770 Board Layout-Ground Plane
MAX3770 Evaluation Evaluates: MAX3770/MAX3771
1.0"
Figure MAX3770 Board Layout-Power Plane
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2000 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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