19-3074; Rev 0; 11/03
MAX3645 Evaluation Kit
_______________ General Description
___________________________Features
The MAX3645 evaluation kit (EV kit) simplifies evaluation
of the MAX3645 limiting amplifier. The EV kit allows easy
programming of the loss-of-signal (LOS) threshold and
provides layout options for alternate output terminations.
♦
♦
♦
♦
♦
Easy +2.97V to +5.5V Electrical Evaluation
Fully Assembled and Tested
Easy LOS Threshold Programming
Designed for 50Ω Test Interfaces
Allows Alternate Output Terminations
____________________Component List
DESIGNATION
QTY
DESCRIPTION
33µF 10% tantalum capacitors
AVX TAJB336K010R
C1, C2
2
______________Ordering Information
3.3µF 10% ceramic capacitors
C3, C4
2
7
1
4
3
PART
MAX3645ESEEVKIT
MAX3645EEEEVKIT
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
IC PACKAGE
16 SOIC
16 QSOP
(0805)
C5–C9,
0.1µF 10% ceramic capacitors
C12, C13
Murata GRP155R61A104K
1000pF 10% ceramic capacitor
C11
Murata GRP155R71H102K
SMA connectors (edge mount)
EF Johnson 142-0701-801
Test points
______________ Component Suppliers
J1, J2, J5, J6
J3, J4, J9
SUPPLIER
AVX
PHONE
FAX
Digi-Key 5000K-ND
843-448-9411
847-639-6400
800-344-4539
770-436-1300
843-626-3123
847-639-1469
218-681-3380
770-436-3030
2×5-pin header block, 0.1in centers
Digi-Key S1012-36-ND
2-pin headers, 0.1in centers
Shunts
JU1
1
3
4
Coilcraft
Digi-Key
Murata
JU2–JU4
JU1–JU4
Digi-Key S9000-ND
Note: Please indicate that you are using the MAX3645 when
1.2µH inductors
L1, L2
R1, R2
R3
2
2
1
ordering from these suppliers.
Coilcraft 1008CS-122XJBC
84.5Ω 1% resistors (0402)
5kΩ variable resistor
________________________ Quick Start
1) Place a shunt on JU3 and remove shunts from JU2
and JU4.
Digi-Key 3296W-1-502-ND
100Ω 1% resistor (0402)
1kΩ 1% resistor (0402)
2kΩ 1% resistor (0402)
R4
R5
R6
1
1
1
2
2
2
1
2) Set the threshold resistor (RTH) to 100Ω by placing
a shunt at position 4 of JU1.
R8, R9
R13, R15
R19, R21
SB1
49.9Ω 1% resistors (0402)
49.9Ω 1% resistors (0805)
Not installed
3) Connect a +2V power supply to J3 (VCC), a –1.3V
power supply to J9 (VEE), and the power supply
ground to J4 (GND).
Solder bridge, open
Test points
TP1–TP3,
6
4) Apply a 155Mbps differential signal (10mVP-P
)
TP9–TP11
Digi-Key 5000K-ND
between SMA connectors J1 (DIN+) and J2 (DIN-).
MAX3645ESE 16-pin SOIC
(MAX3645ESEEVKIT)
MAX3645EEE 16-pin QSOP
(MAX3645EEEEVKIT)
5) Connect an oscilloscope with 50Ω terminations to
SMA connectors J5 (DOUT-) and J6 (DOUT+).
(To avoid overloading the oscilloscope, use 20dB of
attenuation between the outputs and the
oscilloscope inputs.)
U1
1
MAX3645ESE EV kit circuit board,
Rev A (MAX3645ESEEVKIT)
None
1
2
MAX3645EEE EV kit circuit board,
Rev A (MAX3645EEEEVKIT)
6) Monitor LOS by connecting a voltage meter to TP9.
Z1, Z2
0Ω resistors (0402)
________________________________________________________________ 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.