MAX3670EVKIT [MAXIM]
Evaluation Kit for the MAX3670 ; 评估板MAX3670\n
| 型号： | MAX3670EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Evaluation Kit for the MAX3670
|
| 文件： | 总6页 (文件大小：350K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2265; Rev 0; 12/01
MAX3670 Evaluation Kit
General Description
Features
ꢀ Fully Assembled and Tested
ꢀ 5.0V Operation
The MAX3670 evaluation kit (EV kit) is an assembled,
surface-mount demonstration board that provides easy
evaluation of the MAX3670155MHz to 670MHz refer-
ence clock generator. The EV kit comes with external
components and a 622.08MHz voltage-controlled crys-
tal oscillator (VCXO).
Ordering Information
Component Suppliers
PART
TEMP RANGE
IC PACKAGE
SUPPLIER
AVX
PHONE
FAX
MAX3670EVKIT
*Exposed pad
-40°C to +85°C
32 QFN-EP*
843-448-9411
408-224-8566
770-436-1300
1-88-VECTRON-1
843-448-1943
Coilcraft
Murata
408-224-6304
770-436-3030
Vectron
1-888-PAX-VECTRON
Electrical Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
C1, C4–C9,
C12, C15, C16,
C20, C22,
R1, R11, R12,
R13, R18–R21,
R23, R24, R26,
R27, R29, R31
0.1µF 10% ceramic capacitors
(0402)
17
2
0
Open
C31–C35
0.015µF 10% ceramic
capacitors (0805)
R1A, R1B
R2
2
1
200kΩ 1% resistors (0402)
100Ω 1% resistor (0402)
C1A, C1B
C2, C3, C3A,
C10, C11, C14,
C19, C21,
C23–C27, C29,
C30
R3, R4, R6, R8,
R10, R16, R17
7
332Ω 1% resistors (0402)
0
Open
R5, R7, R9,
R14, R15, R22,
R28, R30, R32
9
1
1
0Ω resistors (0402)
6800pF 10% ceramic
capacitor (0805)
C3B
C13
1
1
U1
MAX3670EGJ 32 QFN-EP
622.08MHz voltage-controlled
SAW oscillator
1µF 10% ceramic capacitor
(0805)
Y1
Vectron VS500A622
C17
1
9
10µF 10% tantalum capacitor
SMA connectors (edge-mount)
None
None
None
1
1
1
MAX3670 EV kit circuit board
MAX3670 EV kit data sheet
MAX3670 data sheet
J1–J8, J11
J9, J10, J12,
J15, J16
0
2
Open
J13, J14
Test points
1 × 3-pin headers
Shunts
JU1–JU5,
JU7–JU10
9
JU1–JU13
13
4
JU6, JU11,
JU12, JU13
1 × 2-pin headers
L1, L3, L4
L2
0
1
Open
56nH inductor
________________________________________________________________ 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.
MAX3670 Evaluation Kit
6) Connect ground to GND.
Quick Start
1) Install shunts JU1, JU4, JU5, JU7, and JU10
between pins 1 and 2.
7) Apply a 1V
differential clock input at 622.08MHz
P-P
to REFCLK+ and REFCLK-.
8) Monitor MOUT+ and MOUT- with a 50Ω system. A
622.08MHz clock signal appears on the oscillo-
scope.
2) Install shunts JU11, JU12, and JU13.
3) Open shunts JU3 and JU6.
4) Install shunts JU2, JU8, and JU9 between pins 2
and 3.
5) Connect a 5V power supply to VCCA.
Adjustment and Control Descriptions*
COMPONENT
NAME
FUNCTION
Sets the phase-detector gain (K ) and the frequency divider ratio (N ).
PD
2
JU1
GSEL1
Shunting between pins 1 and 2 sets to GND. Shunting between pins 2 and 3
sets to V (see Table 1).
CC
Sets the phase-detector gain (K ) and the frequency divider ratio (N ).
PD
2
Shunting between pins 1 and 2 sets to GND. Shunting between pins 2 and 3
sets to V (see Table 1).
JU2
GSEL2
CC
Sets the phase-detector gain (K ) and the frequency divider ratio (N ).
PD
2
Shunting between pins 1 and 2 sets to GND. Shunting between pins 2 and 3
sets to V (see Table 1).
JU3
JU4
GSEL3
RSEL
CC
Sets the predivider ratio for the reference input clock. Shunting between pins 1
and 2 sets to GND. Shunting between pins 2 and 3 sets to V (see Table 2).
CC
Sets the predivider ratio for the VCO input clock. Shunting between pins 1 and 2
sets to GND. Shunting between pins 2 and 3 sets to V (see Table 3).
CC
JU5
JU6
VSEL
—
Open when VCO is activated. Closed when VCO is disabled.
Sets the internal compensation of the op amp. Shunting between pins 1 and 2
sets the compensation to GND. Shunting between pins 2 and 3 sets the
JU7
COMP
compensation to V
.
CC
Sets the output clock divider. Shunting between pins 1 and 2 sets to GND.
Shunting between pins 2 and 3 sets to V (see Table 4).
JU8
JU9
PSEL2
PSEL1
POLAR
CC
Sets the output clock divider. Shunting between pins 1 and 2 sets to GND.
Shunting between pins 2 and 3 sets to V (see Table 4).
CC
Sets the polarity of the op amp. Shunting between pins 1 and 2 sets the
polarity to GND. Shunting between pins 2 and 3 sets the polarity to V
JU10
.
CC
*See Quick Start first.
2
_______________________________________________________________________________________
MAX3670 Evaluation Kit
Adjustment and Control Descriptions (continued)
COMPONENT
JU11
NAME
—
FUNCTION
Ensure that shunt is installed.
JU12
—
Ensure that shunt is installed.
JU13
—
Ensure that shunt is installed.
Table 1. Gain Logic Pin Setup
Table 2. Reference Clock Divider
INPUT
PIN
GSEL1
INPUT
PIN
GSEL2
INPUT
PIN
GSEL3
REFERENCE
CLOCK INPUT
FREQ (MHz)
DIVIDER
RATIO
(N )
3
PREDIVIDER
OUTPUT
FREQ (MHz)
K
DIVIDER
RATIO N
INPUT
PIN RSEL
PD
(µA/UI)
V
V
V
20
20
20
20
20
20
20
20
20
20
20
5
1
2
V
77.76
155.52
622.08
1
2
8
77.76
77.76
77.76
CC
CC
CC
CC
OPEN
GND
V
V
OPEN
GND
CC
CC
V
V
4
CC
CC
V
OPEN
OPEN
OPEN
GND
V
V
V
V
V
V
8
CC
CC
CC
CC
CC
CC
CC
OPEN
GND
16
32
64
128
256
512
1024
1
Table 3. VCO Clock Divider
V
CC
VCO CLOCK
INPUT FREQ
(MHz)
DIVIDER
RATIO
(N )
1
PREDIVIDER
OUTPUT
FREQ (MHz)
INPUT
PIN VSEL
OPEN
GND
GND
GND
V
V
V
V
V
V
GND
GND
CC
CC
CC
CC
CC
CC
V
77.76
155.52
622.08
1
2
8
77.76
77.76
77.76
CC
OPEN
OPEN
GND
V
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
GND
CC
OPEN
GND
5
2
5
4
V
OPEN
OPEN
OPEN
GND
5
8
CC
Table 4. Optional Clock Output Divider
OPEN
GND
5
16
32
64
128
256
512
1024
5
INPUT PIN
PSEL1
INPUT PIN
PSEL2
VCO TO POUT
DIVIDE RATIO
V
5
CC
OPEN
GND
GND
5
V
V
V
1
2
4
8
CC
CC
CC
GND
5
GND
V
OPEN
OPEN
5
CC
V
GND
GND
CC
OPEN
GND
5
GND
_______________________________________________________________________________________
3
MAX3670 Evaluation Kit
V S E L
V C
P O 1
V C C D
R E F C L K -
P S E L 1
P S E L 2
V C C A
C O M P
A M O P P -
A M O P P +
R E F C L K +
R S E L
G N D
L O L
V C C D
Figure 1. MAX3670 EV Kit Schematic
4
_______________________________________________________________________________________
MAX3670 Evaluation Kit
1.0"
1.0"
Figure 2. MAX3670 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX3670 EV Kit Component Placement Guide—
Solder Side
1.0"
1.0"
Figure 5. MAX3670 EV Kit PC Board Layout—Solder Side
Figure 4. MAX3670 EV Kit PC Board Layout—Component Side
_______________________________________________________________________________________
5
MAX3670 Evaluation Kit
1.0"
1.0"
Figure 6. MAX3670 EV Kit PC Board Layout—Ground Plane
Figure 7. MAX3670 EV Kit PC Board Layout—Power Plane
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.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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