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.
Features
o Fully Assembled and Tested
o Fully Matched for Best Return Loss
Evaluates: MAX3930
MAX3930 Evaluation Kit
________________________________________________________________ Maxim Integrated Products
1
19-2070; Rev 0; 6/01
Component List
Ordering Information
Component Suppliers
Note: Please indicate that you are using the MAX3930 when
contacting these component suppliers.
DESIGNATION
QTY
DESCRIPTION
C1, C2, C3, C6,
C7, C17, C18
7
1000pF
10% ceramic
capacitors (0201)
Murata GRM33X3R102K016A
C4, C5
2
0.01
F 10% ceramic
capacitors (0201)
Panasonic EJC-ZEBOJ103K
C8, C10, C12,
C13, C14
5
0.01
F 10% ceramic
capacitors (0402)
Murata GRM36X7R103K016A
C9, C11
2
10
F 10% tantalum capacitors
AVX TAJB106K010
C15
1
100pF
10% ceramic capacitor
(0201)
Murata GRM33X7R101K010A
C16
0
Not installed
R1
1
2k
variable resistor
Bourns 3296W-202 or
Digi-Key 3296W-202-ND
R2, R3, R9, R10
4
4.99k
1% resistors (0402)
R4, R11
2
15k
1% resistors (0402)
R5, R12
2
200k
variable resistors
Bourns 3296W-204 or
Digi-Key 3296W-204-ND
R6
1
15
1% resistor (0402)
R7, R8
2
66.5
1% resistors (0402)
Note: R7 and R8 will be
installed with resistive material
facing down on the circuit board.
R13, R14
2
49.9
1% resistors (0402)
R15, R16
0
Not installed
DESIGNATION
QTY
DESCRIPTION
R17, R18
2
100
1% resistors (0402)
L1, L2
2
220nH inductors
Coilcraft 0805CS-221XKBC
U1
1
MAX3930E/D (die) 81X46
U2, U3
2
MAX480ESA 8-pin SOs
U4
1
MAX6190AESA 8-pin SO
J3J7
5
SMA connectors (edge-mount)
TP1, TP3TP12,
J1, J2, J8
14
Test points
Digi-Key 5000K-ND
JU1, JU2
2
1
2 pin headers (0.1in centers)
Digi-Key S1012-36-ND
JU1, JU2
2
Shunts
Digi-Key S9000-ND
None
1
MAX3930 Rev C EV kit circuit
board
None
1
MAX3930 EV kit data sheet
None
1
MAX3930 data sheet
PART TEMP. RANGE
IC PACKAGE
MAX3930EVKIT -40
C to +85C Chip On Board
SUPPLIER
PHONE
FAX
AVX
843-444-2863
843-626-3123
Coilcraft
847-639-6400
847-639-1469
Digi-Key
218-681-6674
218-681-3380
EFJohnson
402-474-4800
402-474-4858
Murata
415-964-6321
415-964-8165
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.
Evaluates: MAX3930
MAX3930 Evaluation Kit
2
_______________________________________________________________________________________
Adjustment and Control Descriptions (see Quick Start first)
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 adjust-
ment 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 sig-
nal (max amplitude
800mV per side, common-
mode 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 intercon-
nect recommendations below.
8) Power up the board with a -5V supply and a -2V
supply.
9) Adjust R5 clockwise until the desired laser modula-
tion current is achieved.
10) Adjust R1 For 50% eye crossing:
I
Output Amplitude Volts
MOD
(
)
=
20
COMPONENT
NAME
FUNCTION
JU1
RETIMING ENABLE
Enables/disables data retiming. Shunt to enable data retiming. Remove
shunt for direct data transmission.
JU2
MODULATION ENABLE
Enables/disables the modulation outputs. Shunt for normal operation.
Remove shunt to switch modulation output off.
R1
PULSE-WIDTH ADJUST
Pulse-Width Control. Adjusts the pulse width.
R5
MOD ADJUST
Adjusts the laser modulation current.
R12
BIAS ADJUST
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 oscillo-
scope 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).
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