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19-2070; Rev 0; 6/01
MAX3930 Evaluation Kit
General Description
The MAX3930 evaluation kit (EV kit) is an assembled demonstration board that provides electrical evaluation of the MAX3930 10.7Gbps laser driver. The output of the evaluation board is interfaced to an SMA connector that can be connected to a 50 terminated oscilloscope. o Fully Assembled and Tested o Fully Matched for Best Return Loss
Features
Evaluates: MAX3930
Ordering Information
PART MAX3930EVKIT TEMP. RANGE -40C to +85C IC PACKAGE Chip On Board
Component List
DESIGNATION C1, C2, C3, C6, C7, C17, C18 QTY 7 DESCRIPTION 1000pF 10% ceramic capacitors (0201) Murata GRM33X3R102K016A 0.01F 10% ceramic capacitors (0201) Panasonic EJC-ZEBOJ103K 0.01F 10% ceramic capacitors (0402) Murata GRM36X7R103K016A 10F 10% tantalum capacitors AVX TAJB106K010 100pF 10% ceramic capacitor (0201) Murata GRM33X7R101K010A Not installed 2k variable resistor Bourns 3296W-202 or Digi-Key 3296W-202-ND 4.99k 1% resistors (0402) 15k 1% resistors (0402) 200k variable resistors Bourns 3296W-204 or Digi-Key 3296W-204-ND 15 1% resistor (0402) 66.5 1% resistors (0402) Note: R7 and R8 will be installed with resistive material facing down on the circuit board. 49.9 1% resistors (0402) Not installed SUPPLIER AVX Coilcraft Digi-Key EFJohnson Murata DESIGNATION R17, R18 L1, L2 U1 U2, U3 U4 J3-J7 TP1, TP3-TP12, J1, J2, J8 JU1, JU2 JU1, JU2 None None None QTY 2 2 1 2 1 5 14 DESCRIPTION 100 1% resistors (0402) 220nH inductors Coilcraft 0805CS-221XKBC MAX3930E/D (die) 81X46 MAX480ESA 8-pin SOs MAX6190AESA 8-pin SO SMA connectors (edge-mount) Test points Digi-Key 5000K-ND 1x2 pin headers (0.1in centers) Digi-Key S1012-36-ND Shunts Digi-Key S9000-ND MAX3930 Rev C EV kit circuit board MAX3930 EV kit data sheet MAX3930 data sheet
C4, C5
2
C8, C10, C12, C13, C14
5
C9, C11
2
2 2 1 1 1
C15 C16 R1 R2, R3, R9, R10 R4, R11 R5, R12 R6
1 0 1 4 2 2 1
Component Suppliers
PHONE 843-444-2863 847-639-6400 218-681-6674 402-474-4800 415-964-6321 FAX 843-626-3123 847-639-1469 218-681-3380 402-474-4858 415-964-8165
R7, R8
2
R13, R14 R15, R16
2 0
Note: Please indicate that you are using the MAX3930 when contacting these component suppliers.
________________________________________________________________ Maxim Integrated Products
1
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.
MAX3930 Evaluation Kit Evaluates: MAX3930
Quick Start
1) If the data is to be latched, place shunt on JU1 to enable clock input; otherwise, leave JU1 open. 2) Install shunt JU2 to enable the outputs. 3) Adjust R5 and R12 to their full counter-clockwise positions. 4) Adjust R1 to the approximate center of the adjustment range. 5) Apply a differential input signal (max amplitude 800mV per side, common-mode voltage = 0) to J3 and J4 (DATA+ and DATA-). 6) If the latch is enabled, apply a differential clock signal (max amplitude 800mV per side, commonmode voltage = 0) to J5 and J6 (CLK+ and CLK-). 7) Attach a high-speed oscilloscope with 50 inputs to J7. For optimum performance, see the interconnect recommendations below. 8) Power up the board with a -5V supply and a -2V supply. 9) Adjust R5 clockwise until the desired laser modulation current is achieved. 10) Adjust R1 For 50% eye crossing: IMOD = Output Amplitude (Volts) 20
Adjustment and Control Descriptions (see Quick Start first)
COMPONENT JU1 JU2 R1 R5 R12 NAME RETIMING ENABLE MODULATION ENABLE PULSE-WIDTH ADJUST MOD ADJUST BIAS ADJUST FUNCTION Enables/disables data retiming. Shunt to enable data retiming. Remove shunt for direct data transmission. Enables/disables the modulation outputs. Shunt for normal operation. Remove shunt to switch modulation output off. Pulse-Width Control. Adjusts the pulse width. Adjusts the laser modulation current. Adjusts the laser bias current.
Recommendations for Interconnect Between the MAX3930 EV Kit and an Oscilloscope
1) Use a high-bandwidth sampling oscilloscope such as the Tektronix CSA8000 mainframe with an 80E01 50GHz sampling head. The 80E03 and 80E04 20GHz sampling heads are not recommended. 2) A high-quality SMA attenuator (14dB or 20dB) is required to reduce the signal level for compatibility with the sampling head. The attenuator should be
connected directly to the output SMA connector on the EV kit to minimize transmission-line reflections. 3) The total path length from the EV kit to the oscilloscope must to be minimized. If possible, connect the female connector of the attenuator to the female input of the oscilloscope with an SMA adapter. If cables must be used, a 0.141in semi-rigid 50 coaxial cable with high-quality SMA connectors is recommended (example: Tektronix 015-1015-00).
2
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MAX3930 Evaluation Kit Evaluates: MAX3930
VREF CW R12 200k VEE R11 15k
TP9 R9 4.99k R10 4.99k TP8 VEE
MAX480
76 3 2 U3 4 15 R16 OPEN VEE C13 0.01F VEE VEE C6 1000pF N.C. TP7
R18 100
R13 49.9 J1 -5V J2 GND C10 J8 0.01F -2V R14 49.9 L2 220nH C8 0.01F L1 220nH C9 10F C11 10F VEE VREF 2 IN VM OUT 6
U4 MAX6190
C16 OPEN
VEE C7 1000pF
VEE
GND 4 VEE 1 J3 2
37 VEE
36 VEE
35 VEE
34 BIASMON
33 BIASSET
32 VEE
31 N.C.
TP6 VCC DATA+ BIAS 30 VCC 29 VCC 28 R6 15 TP1
J4
3V TT 4 DATA5 VCC
J5
U1 MAX3930
6 CLK+ 7 VTT
MODN1 27 MOD1 26 OUTPUT J7
J6
8 CLK9V CC 10 VEE VEE C1 1000pF 11 V EE 12 VCC JU1 VEE 13 RTEN MODMON MODSET 14 PWC+ MODEN PWCVEE VEE MOD2 25 MODN2 24 VCC 23 VCC 22 C17 1000pF C4 0.01F C5 0.01F C18 1000pF R7 66.5 R8 66.5 VM
R1 2k
15
16
17
18
19 C2 1000pF
20 21 C3 1000pF VEE C12 0.01F C15 100pF R17 100 VEE VEE TP5
JU2 VEE TP10 C14 0.01F VREF CW R5 200k VEE R4 15k R3 4.99k VEE TP4 TP12 TP11
VEE VEE TP3
R2 4.99k
R15 OPEN 21 3
4 U2 6 7
MAX480
Figure 1. MAX3930 EV Kit Schematic _______________________________________________________________________________________ 3
VEE
MAX3930 Evaluation Kit Evaluates: MAX3930
1.0"
Figure 2. MAX3930 EV Kit Component Placement Guide--Component Side
1.0"
Figure 3. MAX3930 EV Kit PC Board Layout--Component Side
4
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MAX3930 Evaluation Kit Evaluates: MAX3930
1.0"
Figure 4. MAX3930 EV Kit PC Board Layout--Ground Plane
1.0"
Figure 5. MAX3930 EV Kit PC Board Layout--Power Plane
_______________________________________________________________________________________
5
MAX3930 Evaluation Kit Evaluates: MAX3930
1.0"
Figure 6. MAX3930 EV Kit PC Board Layout--Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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