MAX3671 EV kit

19-4460; Rev 0; 2/09
EVALUATION KIT AVAILABLE
MAX3671 Evaluation Kit
The MAX3671 evaluation kit (EV kit) is a fully assembled
and tested demonstration board that simplifies evaluation of the MAX3671 low-jitter frequency synthesizer
with selectable input reference. The EV kit includes
slide switches to allow easy selection of different
modes of operation. Clock I/Os have SMA connectors
and are AC-coupled to simplify connection to test
equipment. The EV kit is powered by a +3.3V supply
and uses LEDs for signal status indicators.
Features
♦ Fully Assembled and Tested
♦ Slide Switches for Mode Control
♦ SMA Connectors and AC-Coupled Clock I/Os
♦ Powered by +3.3V Supply
♦ LED Signal Status Indicators
Ordering Information
PART
TYPE
MAX3671EVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
C1, C6, C7
C11–C13, C16,
C18–C22,
C24–C27, C29,
C30, C32–C39,
C41, C42,
C46–C50,
C62, C63
C2
35
1
DESCRIPTION
0.1μF ±10% ceramic capacitors
(0402)
33μF ±5% tantalum capacitor
(B case)
DESIGNATION QTY
DESCRIPTION
R1–R5, R15,
R16, R17,
R37–R46
18
150 ±1% resistors (0402)
R6–R11
6
49.9 ±1% resistors (0402)
R12, R13, R14,
R18, R21, R22
6
332 ±1% resistors (0603)
R23, R24, R25
3
10k ±1% resistors (0603)
S1
1
Switch, momentary, SPST-NO
Panasonic EVQQ2S02W
C3
1
2.2μF ±10% ceramic capacitor (0805)
C4
1
0.1μF ±10% ceramic capacitor (0603)
S2, S3, S5
3
Switches, slide, SPDT
Copal Electronics CUS-12TB
C5
1
0.01μF ±10% ceramic capacitor
(0603)
S6, S7, S8
3
C28
1
0.22μF ±10% ceramic capacitor
(0402)
Switches, slide, SP4T
Copal Electronics CUS-14TB
S9, S10
2
D1, D3, D8
3
Green SMD LEDs (1206)
Panasonic LNJ311G8PRA
Switches, slide, SP3T
Copal Electronics CUS-13TB
TP3, TP20
2
Test points
Keystone 5000
U1, U2, U4
3
Dual inverters (6 SC-70)
TI SN74LVC2G14DCKR
U7
1
Low-jitter, frequency synthesizer
with selectable input reference
(56 TQFN)
Maxim
MAX3671ETN+
Microsemi
MAX3671ETN+
None
1
PCB: MAX3671 EV Kit+ Circuit
Board, Rev A
D2, D4, D7
3
Red SMD LEDs (1206)
Panasonic LNJ211R8ARA
J1, J2,
J5–J12, J14,
J15, J19, J20,
J22–J29,
J44, J45
24
J4, J13
2
Test points
Keystone 5000
L1
1
4.7μH ±20% inductor
Taiyo Yuden CBC3225T4R7M
SMA connectors, edge-mount,
tab center
Johnson 142-0701-851
________________________________________________________________ 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.
1
Evaluates: MAX3671
General Description
Evaluates: MAX3671
MAX3671 Evaluation Kit
Quick Start
1) Set the slide switches to the following settings:
PLL_BYPASS = NORMAL
SEL_CLK = REFCLK0
DM = 62.5M
DA = 125M
DB = 125M
OUTA_EN = A0, A1
OUTB_EN = B0
Detailed Description
The MAX3671 EV kit simplifies evaluation by providing
the hardware needed to evaluate all the MAX3671
functions. Table 1 contains functional descriptions for
the switches and indicators.
Clock Inputs
FB_SEL = INTERNAL
2) Connect a +3.3V supply to VCC (J13) and GND
(J4). Set the supply current limit to 450mA.
3) Using SMA cables, connect a low-jitter 62.5MHz differential clock source to the REFCLK0 input. Verify
that the green LEDs switch on for IN0FAIL and
LOCK.
4) Using SMA cables, connect the OUTA0 output to
test equipment. Terminate all unused enabled outputs (OUTB0 and OUTA1).
The clock inputs (REFCLK0, REFCLK1, FB_IN) are ACcoupled at the SMA connectors and have on-board
100Ω differential terminations. For optimal jitter performance it is critical to use a low-jitter, differential,
square-wave clock source. If such a source is not available, the clock inputs can be driven with a singleended sinusoidal or square-wave clock source for
functional testing.
Clock Outputs
The clock outputs (OUTA[3:0], OUTB[4:0]) have onboard DC-biasing and are AC-coupled at the SMA connectors to allow direct connection to 50Ω-terminated
test equipment. Unused outputs should be disabled
(using switches S9 and S10) or have 50Ω terminations
placed on the SMA connectors.
Table 1. Switch and Indicator Descriptions
COMPONENT
NAME
FUNCTION
S1
MASTER RESET
S2
PLL_BYPASS
S3
SEL_CLK
S5
FB_SEL
S6
DM
Selects the frequency of the reference clock inputs.
S7
DA
Selects the frequency of the A-group clock outputs.
S8
DB
Selects the frequency of the B-group clock outputs.
Momentary switch to reset internal dividers. Not required at power-up. If the output divider
settings (DA, DB) are changed on the fly, a reset is required to phase align the outputs.
Selects normal PLL operation or PLL bypass.
Selects the reference clock input.
Selects internal or external feedback for the PLL. If external is selected, connect any of the
A-group or B-group outputs to the FB_IN input. If DA DB, a B-group output must be used.
S9
OUTA_EN
S10
OUTB_EN
D1, D2
IN0FAIL
REFCLK0 failure indicator (green = pass, red = fail).
D3, D4
IN1FAIL
REFCLK1 failure indicator (green = pass, red = fail).
D7, D8
LOCK
Selects which A-group outputs are enabled (see Note).
Selects which B-group outputs are enabled (see Note).
PLL lock indicator (green = PLL locked, red = PLL not locked).
Note: Setting OUTA_EN = “—” and OUTB_EN = “B0” at the same time enables a factory test mode and is not a valid mode of operation.
2
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MAX3671 Evaluation Kit
Evaluates: MAX3671
Figure 1. MAX3671 EV Kit Schematic
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3
Evaluates: MAX3671
MAX3671 Evaluation Kit
Figure 2. MAX3671 EV Kit Component Placement Guide—Component Side
4
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MAX3671 Evaluation Kit
Evaluates: MAX3671
Figure 3. MAX3671 EV Kit PCB Layout—Component Side
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5
Evaluates: MAX3671
MAX3671 Evaluation Kit
Figure 4. MAX3671 EV Kit PCB Layout—Ground Plane
6
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MAX3671 Evaluation Kit
Evaluates: MAX3671
Figure 5. MAX3671 EV Kit PCB Layout—Power Plane
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7
Evaluates: MAX3671
MAX3671 Evaluation Kit
Figure 6. MAX3671 EV Kit PCB Layout—Solder Side
8
_______________________________________________________________________________________
MAX3671 Evaluation Kit
Evaluates: MAX3671
Figure 7. MAX3671 EV Kit Component Placement Guide—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 _____________________ 9
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.9
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