MAXIM MAX3783EVKIT

19-2197; Rev 0; 10/01
MAX3783 Evaluation Kit
Features
♦ Fully Assembled and Tested
♦ Single +3.3V Power-Supply Operation
♦ Termination of Unused Outputs Provided OnBoard
♦ Easy Selection of Operating Modes
Ordering Information
Component List
DESIGNATION
QTY
DESCRIPTION
PART
TEMP. RANGE
IC PACKAGE
MAX3783EVKIT
0°C to +85°C
48 TQFP-EP*
C1–C40
40
0.1µF ±10% ceramic capacitors
(0402)
Murata GRM36X5R104K010AD
C41
1
33µF ±10% tantalum capacitor (C)
AVX TAJC336K010
C42
1
2.2µF ±10% tantalum capacitor (C)
AVX TAJC225K035
J1–J28
28
SMA connectors (edge-mount)
SUPPLIER
J29, J30
2
Test points
*Exposed pad
Component Suppliers
PHONE
FAX
AVX
803-946-0690
803-626-3123
847-639-6400
847-639-1469
814-237-1431
814-238-0490
JU1–JU6
6
1 × 2-pin headers (0.1in centers)
Coilcraft
1
47nH inductor (0805)
Coilcraft 0805CS-470XKBC
Murata
L1
R1–R6
6
1kΩ ±1% resistors (0603)
R7–R13
7
100Ω ±1% resistors (0603)
U1
1
MAX3783UCM 48-pin TQFP-EP
(exposed pad)
None
6
Shunts
None
1
MAX3783 evaluation board
None
1
MAX3783 data sheet
Quick Start
1) Remove R12 (differential termination resistor) from
the evaluation board. Note: Be sure to clean flux
residue thoroughly.
2) Apply +3.3V to the VCC pin (J29). Connect powersupply ground to the GND pin (J30).
3) Shunt jumper JU5 (SELA). Refer to Table 1 for other
configurations.
4) Apply up to 3.125Gbps differential data to LI2A±
(J17 and J18).
5) Connect SOA± (J23 and J24) to a high-speed 50Ω
oscilloscope.
________________________________________________________________ Maxim Integrated Products
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.
1
Evaluates: MAX3783
General Description
The MAX3783 evaluation kit (EV kit) is an assembled
demonstration board that provides easy evaluation of
the MAX3783 multiplexer/buffer. The MAX3783 EV kit
provides 100Ω differential output terminations onboard, simplifying termination of unused outputs.
Evaluates: MAX3783
MAX3783 Evaluation Kit
Detailed Description
Connecting CML Outputs to 50Ω
Oscilloscopes
CML outputs have a common-mode voltage near VCC,
which is incompatible with oscilloscopes terminated in
50Ω to ground. To avoid interfering with the commonmode voltage, all MAX3783 CML outputs are AC-coupled on-board with 0.1µF capacitors. The CML outputs
should not be connected directly through 50Ω to
ground.
Terminating Unused Outputs
The MAX3783 EV kit has 100Ω differential resistors
placed across all outputs. These resistors must be
removed before connecting the outputs to a 50Ω oscilloscope. For best performance, keep all outputs terminated, either to a 50Ω measurement device or to the
100Ω differential resistor.
2
Control Lines
Jumpers JU1–JU6 are provided to set the operating
mode of the MAX3783. Shorting these jumpers pulls the
corresponding TTL control line to a logical zero. All TTL
control lines are internally pulled high through 15kΩ
resistors. See Table 1 to set operating modes.
Exposed Pad (EP) Package
The exposed pad 48-pin TQFP-EP provides a very low
thermal-resistance path for heat removal from the IC.
The pad is also electrical ground on the MAX3783 and
must be soldered to the circuit board for proper thermal
and electrical performance.
Table 1. Operating Modes
SEL_
SO_
LB_
LO_
0
LI2_
0
LI_
1
LI1_
1
SI_
_______________________________________________________________________________________
MAX3783 Evaluation Kit
J29
C41
J30 33µF
LO2A+
J20
C35
0.1µF
C36
0.1µF
L1
47nH
C32
0.1µF
R12
100Ω
C31
0.1µF
R10
100Ω
R11
100Ω
VCC
VCC
LO2AJ19
C33
0.1µF
C34
0.1µF
VCC
C42
2.2µF
R6
1kΩ
LO1AJ21
SOAJ23
SOA+
J24
Evaluates: MAX3783
LO1A+
J22
VCC
VCC
JU5 SELA
7
C3
0.1µF
8
VCC
9
10
11
SIB-
12
R5
1kΩ
JU6 SELB
C39
0.1µF
VCC
GND
LO2A-
VCC
LO2A+
LO1A-
VCC
LO1A+
SOA-
VCC
GND
J28
34
VCC
LI2A+
LI2AC25
0.1µF
32
LI1AC23
0.1µF
31
30
GND
VCC
LI1B+
SIB+
SIB-
VCC
26
LI2B25
LI2B+
J15
27
VCC
LI1B+
C21
0.1µF
LI2B+
C19
0.1µF
LI1A+
C24
0.1µF
J13
LI1BC22
0.1µF
J11
LI2BC20
0.1µF
29
28
J18
J17
33
LI1B-
J16
J14
J12
VCC
13 14 15 16 17 18 19 20 21 22 23 24
VCC
VCC
R8
100Ω
VCC
VCC
C5
C6
C7
C8
C9
C12
0.1µF 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF
J26
C40 R13
0.1µF 100Ω
35
LB2B
GND
C26
0.1µF
36
LB1B
C38
0.1µF
J27
LI1A-
MAX3783
LB2A
SELB
C4
0.1µF
LB1A
GND
JU3 LB1B
JU4 LB2B
6
LI1A+
VCC
5
VCC
U1
LO2B-
JU1 LB1A
JU2 LB2A
SIA+
VCC
LO2B+
4
LI2A-
VCC
VCC
SIA-
LO1B-
SIB+
J4
3
LO1B+
R1
1kΩ
R2
1kΩ
R3
1kΩ
R4
1kΩ
J3
2
C2
0.1µF
SIA+
LI2A+
VCC
J2
GND
SOB-
SIA-
1
SOB+
C1
0.1µF
VCC
J1
SOA+
SELA
48 47 46 45 44 43 42 41 40 39 38 37
C15
0.1µF
C37
0.1µF
J25
C10
0.1µF
J5
SOB+
VCC
C16
0.1µF
R9
100Ω
R7
100Ω
C17
0.1µF
C11
0.1µF
J9
J6
SOB-
LO2B+
J7
LO1B+
C18
0.1µF
C27
C28
C29
C30
C13
C14
0.1µF 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF
J10
LO2B-
J8
LO1B-
Figure 1. MAX3783 EV Kit Schematic
_______________________________________________________________________________________
3
Evaluates: MAX3783
MAX3783 Evaluation Kit
1.0"
Figure 2. MAX3783 EV Kit Component Placement Guide—Component Side
4
_______________________________________________________________________________________
MAX3783 Evaluation Kit
Evaluates: MAX3783
1.0"
1.0"
Figure 3. MAX3783 EV Kit PC Board Layout—Component Side
1.0"
Figure 4. MAX3783 EV Kit PC Board Layout—Ground Plane
1.0"
Figure 5. MAX3783 EV Kit PC Board Layout—Power Plane
Figure 6. MAX3783 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.