Download Evaluates: MAX3885 MAX3885 Evaluation Kit ________________General Description ____________________________Features

19-0763; Rev 3; 12/07
MAX3885 Evaluation Kit
____________________________Features
The MAX3885 evaluation kit (EV kit) simplifies evaluation of the MAX3885 2.488Gbps, SDH/SONET 1:16
deserializer. The EV kit requires only a single +3.3V
supply and includes all the external components necessary to interface with 3.3V PECL and LVDS logic. The
board can be connected directly to the output of a
clock-and-data-recovery circuit (such as the MAX3875)
and to the input of an LVDS device (such as an overhead termination circuit). A signal generator or stimulus
system can be used with an oscilloscope to evaluate
the MAX3885’s basic functionality.
♦ Single +3.3V Supply
♦ Inputs and Outputs Terminated for Interfacing
with 3.3V PECL and LVDS Logic
♦ Fully Assembled and Tested Surface-Mount Board
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Coilcraft
847-639-6400
www.coilcraft.com
Vishay Sprague
603-224-1961
www.vishay.com
Ordering Information
PART
TEMP RANGE
MAX3885EVKIT
-40°C to +85°C
IC PACKAGE
64 TQFP
Note: Please indicate that you are using the MAX3885 when
contacting these component suppliers.
Component List
DESIGNATION QTY
DESCRIPTION
C1, C3, C5,
C7, C12–C21
14
0.1μF, 25V min, 10% ceramic caps
(0603)
C2, C4,
C6, C8
0
Not installed (shorted by PC
board trace)
C9
1
33μF, 10V min, ±10% tantalum cap
Sprague 293D336X0010C2
C10
1
2.2μF, 10V min, ±10% tantalum cap
Sprague 293D225X0010A2
DESIGNATION QTY
R13, R14, R16,
R17, R19, R20,
R22, R23, R25,
R26, R28, R29,
R31, R32, R34,
R35, R37, R38,
R40, R41, R43,
R44, R46, R47,
R49–R52, R54,
R55, R57, R58,
R60, R61
DESCRIPTION
0
Not installed
C11
0
Not installed (open)
R1, R3, R5, R7
4
133, 1% resistors (0603)
J1–J6
6
SMA connectors (PC mount)
R2, R4, R6, R8
4
86.6, 1% resistors (0603)
J7–J40
34
SMB connectors (PC mount)
L1
1
56nH inductor
Coilcraft 0805CS-560XKBC
IN1, IN2
2
Test points
R12, R15, R18,
R21, R24, R27,
R30, R33, R36,
R39, R42, R45,
R48, R53, R56,
R59, R62
17
100, 1% resistors (0603)
U1
1
MAX3885ECB
None
1
MAX3885 EV kit PC board
None
1
MAX3885 data sheet
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
www.BDTIC.com/maxim
1
Evaluates: MAX3885
________________General Description
Evaluates: MAX3885
MAX3885 Evaluation Kit
_______________Detailed Description
The MAX3885 EV kit simplifies evaluation of the
MAX3885 deserializer. The EV kit operates from a single +3.3V supply and includes all the external components necessary to interface with 3.3V PECL and LVDS
logic.
Each PECL input (SCLK+, SCLK-, SD+, SD-) is terminated on the EV board with the Thevenin equivalent of
53Ω to (VCC - 2V). These inputs can be driven directly
by the output of any 3.3V PECL device, such as a
clock-and-data-recovery circuit (e.g., the MAX3875).
For inputs other than directly coupled 3.3V PECL, provision is made on the board to AC couple the input.
Remove the trace between C2, C4, C6, and C8 and
install 0.1µF 0603 ceramic capacitors (see the
MAX3885 data sheet).
All LVDS outputs (PCLK+, PCLK-, PD_+, PD_-) are differentially terminated with 100Ω resistors between complementary outputs. Each output can directly drive an
LVDS input or a high-impedance input oscilloscope
(see Connecting LVDS Outputs to 50Ω Oscilloscope
Inputs ). When driving an LVDS input that already
includes 100Ω differential termination, remove the termination resistor corresponding to the appropriate
LVDS output.
2
The synchronization inputs (SYNC+, SYNC-) are internally terminated LVDS inputs with 100Ω differential
input resistance. Ensure that LVDS devices driving
these inputs are not redundantly terminated.
All signal inputs and outputs use coupled 50Ω transmission lines. All input signal lines are of equal length to
minimize propagation-delay skew. Likewise, all output
signal lines are of equal length.
__________Applications Information
Connecting LVDS Outputs to
50Ω Oscilloscope Inputs
To monitor an LVDS signal on a 50Ω input oscilloscope,
remove the differential load resistor between the complementary outputs and AC couple each output to an
oscilloscope input. For example, to observe the PD0 signal on a 50Ω input instrument, remove resistor R15 from
the EV board and place a capacitor or DC block in
series with each output (PD0+ or PD0-) and the instrument input. Do not connect MAX3885 outputs directly
to 50Ω inputs or terminations to ground. Choose a
coupling capacitor large enough in value to prevent pattern-dependent distortion of the output signal.
_______________________________________________________________________________________
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MAX3885 Evaluation Kit
Evaluates: MAX3885
JH1
PD15PD14PD13PD12PD11PD10PD9PD8-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PD15+
PD14+
PD13+
JU1
PD12+
VCC
R9
OPEN
PD11+
JU2
PD10+
PD9+
PD8+
JU3
C1
0.1μF
R11
OPEN
JU4
VCC
JH2
PCLKPD7PD6PD5PD4PD3PD2PD1PD0-
R2
86.6Ω
1%
R1
133Ω
J1 1%
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
C11
OPEN
R10
OPEN
GND
C2
SHORT
SD+
SD+
C3
0.1μF
PCLK+
PD7+
VCC
SDR4
86.6Ω
1%
R3
133Ω
J2 1%
PD6+
PD5+
C4
SHORT
C6
SHORT
SD-
PD4+
C5
0.1μF
PD3+
SCLK+
VCC
PD2+
R6
86.6Ω
1%
R5
133Ω
J3 1%
PD1+
PD0+
SCLKC8
SHORT
SCLK+
C7
0.1μF
J5
SYNC-
SYNC-
VCC
J4
R7
133Ω
1%
R8
86.6Ω
1%
J6
SYNC+
SCLK-
SYNC+
L1
56nH
IN1
+3.3V
C9
33μF
10V
C10
2.2μF
10V
C12
0.1μF
C13
0.1μF
C14
0.1μF
C19
0.1μF
C20
0.1μF
C21
0.1μF
GND
IN2
C15
0.1μF
C16
0.1μF
C17
0.1μF
C18
0.1μF
VCC
Figure 1. MAX3885 EV Kit Schematic
_______________________________________________________________________________________
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3
PD15-
PD14-
PD15+
PD13-
PD14+
R60
OPEN
J39
PD12-
PD13+
R57
OPEN
J37
R61
OPEN
J40
R62
100Ω
1%
PD11-
PD12+
R54
OPEN
J35
R58
OPEN
J38
PD11+
R51
OPEN
J33
R55
OPEN
J36
R59
100Ω
1%
R56
100Ω
1%
R46
OPEN
J29
R52
OPEN
J34
R53
100Ω
1%
R47
OPEN
J30
R48
100Ω
1%
VCC
PD10+
PD10-
12
13
14
15
SYNC-
GND
PD10-
PD11-
PD10+
PD12-
PD11+
VCC
PD12+
GND
PD13-
PD14-
PD13+
PD15-
SCLK+
PD7-
VCC
PD6+
SCLK-
PD6-
VCC
PD5+
SYNC-
PD5-
SYNC+
VCC
GND
GND
GND
16
PD7+
48
47
PD9+
46
45
PD9-
44
PD8+
43
PD8-
42
41
PD7+
40
39
PD7-
38
PD6+
37
PD6-
36
PD5+
35
PD5-
34
33
GND
SCLK-
VCC
PD4+
11
MAX3885
PD4-
10
VCC
GND
PD3+
SCLK+
VCC
GND
PD3-
9
PD8-
U1
PD2+
8
PD8+
SD-
PD2-
7
VCC
VCC
6
PD9-
GND
SD-
SD+
PD1+
5
PD9+
PD1-
4
VCC
VCC
PD0+
SD+
GND
GND
PD0-
3
GND
PCLK+
2
PD14+
GND
1
GND
PD15+
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
PCLK-
Evaluates: MAX3885
MAX3885 Evaluation Kit
SYNC+
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
PD4+
PD4-
J7
R12
100Ω
1%
J9
J8
J13
PD0+
PD1+
J15
R25
OPEN
R23
OPEN
PD2PD2+
R24
100Ω
1%
J16
R22
OPEN
R20
OPEN
PD1-
R21
100Ω
1%
J14
R19
OPEN
R17
OPEN
PD0-
R18
100Ω
1%
J12
R16
OPEN
R14
OPEN
PCLK+
J11
J10
R13
OPEN
PCLK-
R15
100Ω
1%
R26
OPEN
PD3PD3+
Figure 1. MAX3885 EV Kit Schematic (continued)
4
_______________________________________________________________________________________
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MAX3885 Evaluation Kit
Evaluates: MAX3885
PD10PD10+
R49
OPEN
J31
R50
OPEN
J32
R45
100Ω
1%
PD10+
PD10-
J25
R39
100Ω
1%
J27
J26
R42
100Ω
1%
J28
PD9+
PD9-
R40
OPEN
PD8+
PD8-
PD8-
R43
OPEN
R41
OPEN
R44
OPEN
PD9-
PD8+
PD9+
PD7+
PD7PD6+
J21
R33
100Ω
1%
J23
R36
100Ω
1%
PD6J22
PD5+
PD5-
J24
R34
OPEN
R37
OPEN
R35
OPEN
PD6-
R38
OPEN
PD7-
PD6+
PD7+
PD4+
J19
PD4-
R30
100Ω
1%
J20
J17
R27
100Ω
1%
R31
OPEN
R32
OPEN
PD5J18
PD5+
R28
OPEN
R29
OPEN
PD4PD4+
Figure 1. MAX3885 EV Kit Schematic (continued)
_______________________________________________________________________________________
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5
Evaluates: MAX3885
MAX3885 Evaluation Kit
1.0"
Figure 2. MAX3885 EV Kit Component Placement Guide—Component Side
6
_______________________________________________________________________________________
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MAX3885 Evaluation Kit
Evaluates: MAX3885
1.0"
Figure 3. MAX3885 EV Kit Component Placement Guide—Solder Side
_______________________________________________________________________________________
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7
Evaluates: MAX3885
MAX3885 Evaluation Kit
1.0"
Figure 4. MAX3885 EV Kit PC Board Layout—Component Side
8
_______________________________________________________________________________________
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MAX3885 Evaluation Kit
Evaluates: MAX3885
1.0"
Figure 5. MAX3885 EV Kit PC Board Layout—Solder Side
_______________________________________________________________________________________
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9
Evaluates: MAX3885
MAX3885 Evaluation Kit
1.0"
Figure 6. MAX3885 EV Kit PC Board Layout—Power Plane
10
______________________________________________________________________________________
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MAX3885 Evaluation Kit
Evaluates: MAX3885
1.0"
Figure 7. MAX3885 EV Kit PC Board Layout—Ground Plane
______________________________________________________________________________________
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11
Evaluates: MAX3885
MAX3885 Evaluation Kit
Revision History
REVISION
NUMBER
REVISION
DATE
3
12/07
PAGES
CHANGED
DESCRIPTION
Replaced Doc ID#, added Component Supplier website addresses.
1
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products.
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