MAX2472EVKIT [MAXIM]
All Critical Peripheral Components Included;
| 型号： | MAX2472EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | All Critical Peripheral Components Included |
| 文件： | 总4页 (文件大小：349K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1466; Rev 0; 6/99
MAX2 4 7 2 /MAX2 4 7 3 Eva lu a t io n Kit s
Evluate:/MAX2473
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX2472/MAX2473 evaluation kits (EV kits) simpli-
fy evaluation of the MAX2472/MAX2473 VCO buffers.
They enable performance testing and require no addi-
tional support circuitry. All inputs and outputs use SMA
connectors to facilitate connection of RF test equip-
ment.
♦ Easy Evaluation of MAX2472/MAX2473
♦ +2.7V to +5.5V Single-Supply Operation
♦ Variable Bias Control (MAX2473)
♦ Single (MAX2473) or Dual (MAX2472) Open-
Collector Outputs
The MAX2472 EV kit is assembled with the MAX2472
and provides a high-impedance input and a pair of
open-collector outputs. The EV kit includes a matching
ne twork tune d for 900MHz. The MAX2473 EV kit is
assembled with the MAX2473 and provides a high-
impedance input, a single open-collector output, and a
bias control input for setting the output power. Output
ma tc he s for 600MHz, 1900MHz, or 2400MHz a re
achieved by replacing the matching components with
values provided in the MAX2472/MAX2473 data sheet.
♦ All Critical Peripheral Components Included
Ord e rin g In fo rm a t io n
IC
SOT
PART
TEMP. RANGE
PACKAGE TOP MARK
MAX2472EVKIT -40°C to +85°C
MAX2473EVKIT -40°C to +85°C
SOT23-6
SOT23-6
AAAZ
AABA
MAX2 4 7 3
Co m p o n e n t Lis t
MAX2 4 7 2
Co m p o n e n t Lis t
DESIGNATION QTY
DESCRIPTION
1pF ±0.1pF ceramic capacitor (0603)
Murata GRM39COG1R0B50V
C1
1
2
3
DESIGNATION QTY
DESCRIPTION
0.01µF 5% ceramic capacitors (0603)
Murata GRM39X7R103J50V
C2, C9
1pF ±0.1pF ceramic capacitors
(0603) Murata GRM39COG1R0B50V
C1, C4
2
3
100pF 5% ceramic capacitors (0603)
Murata GRM39COG101J50V
C3, C7, C8
0.01µF 5% ceramic capacitors (0603)
Murata GRM39X7R103J50V
C2, C5, C9
C4, C5, C6
C10
0
1
Not installed
1µF 5% ceramic capacitor (0805)
100pF 5% ceramic capacitors (0603)
Murata GRM39COG101J50V
C3, C6, C7, C8
4
1
1
12nH 5% inductor (0603)
Coilcraft 0603HS-12NTJBC
L1
1
C10
L1
1µF 5% ceramic capacitor (0805)
Z1
R1, R6
R2
1
2
1
1
1
0
1
1
2
0Ω resistor (0603)
0Ω resistors (0603)
11kΩ 5% resistor (0603)
15kΩ 5% resistor (0603)
23kΩ 5% resistor (0603)
Not installed
12nH 5% inductor (0603)
Coilcraft 0603HS-12NTJBC
12nH 5% inductor (0603)
Coilcraft 0603HS-12NTJBC
Z1
1
R3
R4
R1–R5
R6, R7
0
2
0
2
Not installed
R5, R7
JU1
0Ω resistors (0603)
Not installed
6-pin header
JU1
None
VCC, GND
Shunt (JU1)
VCC, GND
Test points
Test points
IN, OUT1,
OUT2
SMA connectors (PC edge-mount)
EF Johnson 142-0701-801
3
SMA connectors (PC edge-mount)
EF Johnson 142-0701-801
IN, OUT1
2
MAX2472EUT
(6-pin SOT23, top mark AAAZ)
MAX2473EUT
(6-pin SOT23, top mark AABA)
U1
1
1
U1
1
1
None
MAX2472/MAX2473 PC board
None
MAX2472/MAX2473 PC board
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX2 4 7 2 /MAX2 4 7 3 Eva lu a t io n Kit s
_________________________Qu ic k S t a rt
_______________De t a ile d De s c rip t io n
The MAX2472/MAX2473 EV kits are fully assembled
a nd fa c tory te s te d . Follow the ins truc tions in the
Connections and Setup section for proper device eval-
uation.
This section describes the circuitry surrounding the IC
in the MAX2472/MAX2473 EV kits. For more detailed
information covering device operation, please consult
the MAX2472/MAX2473 data sheet.
Fig ure 1 s hows the s c he ma tic for the MAX2472/
MAX2473 EV kits . Inp ut c a p a c itors C7 a nd C8 a re
100pF DC-blocking capacitors; this value contributes
minima l re a c ta nc e to the s ig na l p a ths , d own to
Te s t Eq u ip m e n t Re q u ire d
This section lists the test equipment recommended to
verify operation of the MAX2472/MAX2473. It is intend-
ed as a guide only, and some substitutions are possi-
ble.
500MHz. Capacitors C9 and C10 form the V decou-
CC
pling network. Note the location of each component; a
relatively large 1µF tantalum capacitor, C10, is located
•
DC power supply capable of supplying a minimum
of 10mA at +2.7V to +5.5V
near the V connector. Placed near the device, a sub-
CC
stantially smaller 0.01µF decoupling capacitor, C9,
reduces any high-frequency interference. The EV kits
include pad R5 to facilitate simple termination of the
input.
•
RF spectrum analyzer capable of making measure-
ments over the bandwidth of the MAX2472/MAX2473
as well as a few harmonics (if desired), such as the
6GHz HP8561E
Both the MAX2472 and MAX2473 EV kits feature a bias
and tuning network at OUT1. Capacitors C2 and C3
form a n outp ut b ia s s up p ly d e c oup ling ne twork.
Inductor L1 acts as an RF choke while providing DC
bias and, in conjunction with C1, forms a narrowband
matching network. The EV kits are output matched for
900MHz operation. The MAX2472 has an identical bias-
supply decoupling network and matching network for
OUT2. For the MAX2473, OUT2’s matching network is
replaced with a set of jumpers to allow the selection of
a bias resistor for the BIAS pin. Set the appropriate
jumper at JU1 to select between 11kΩ, 15kΩ, or 23kΩ
(R2, R3, and R4, respectively).
•
RF signal generator capable of delivering 0dBm out-
put power from 500MHz to 2500MHz, such as the
HP8648C signal generator
•
•
50Ω SMA termination
Two 50Ω SMA cables
Co n n e c t io n s a n d S e t u p
1) Verify the DC power supply is set to no more than
+5.5V and is off before connecting the supply to the
EV kit. A good starting voltage is +3.0V. Connect the
A
power supply between V
and GND, then turn on
CC
the power supply.
2) Se t the outp ut p owe r of the s ig na l g e ne ra tor to
-20dBm at 900MHz. Disable the generator’s output,
then connect the output of the signal generator to
the IN SMA connector of the MAX2472/MAX2473 EV
kit board. For the MAX2472, terminate OUT2 with a
50Ω termination. For the MAX2473, set the center
Co m p o n e n t S u p p lie rs
SUPPLIER
PHONE
FAX
URL
http://www.
coilcraft.com
Coilcraft
800-322-2645 847-639-1469
jumper at JU1 to set R
= 15kΩ.
BIAS
3) Connect OUT1 to the spectrum analyzer’s RF input.
http://www.ef
johnson.com
E.F. Johnson 402-474-4800 402-474-4858
Murata 770-436-1300 770-436-3030
An a lys is
1) Adjust the frequency span, center frequency, and
amplitude of the spectrum analyzer to observe the
signal peak at 900MHz; the output signal power
should read approximately -9dBm. The first harmon-
ic (1800MHz) will b e a p p roxima te ly -35d Bm
(-25dBc).
http://www.
murata.com
2
_______________________________________________________________________________________
MAX2 4 7 2 /MAX2 4 7 3 Eva lu a t io n Kit s
Evluate:/MAX2473
VCC
R6
C3
0Ω
100pF
C2
L1
12nH
0.01µF
SMA
OUT1
6
1
VCC
GND
OUT1
V
CC
U1
C10
1µF
C9
0.01µF
C1
1pF
MAX2472
MAX2473
5
4
2
3
GND
GND
IN
*
1pF
C4
C8
100pF
C7
100pF
SMA
OUT2
SMA
IN
OUT2
R5
OPEN
Z1
*
C5
*
R1
C6*
1
3
4
5
6
JU1
*
R7
2
*REFER TO APPROPRIATE COMPONENT LIST
FOR COMPONENT VALUES.
V
CC
R2*
R3*
*
R4
Figure 1. MAX2472/MAX2473 EV Kit Schematic
1.0"
1.0"
Figure 3. MAX2472/MAX2473 EV Kit PC Board Layout—
Component Side
Figure 2. MAX2472/MAX2473 EV Kit Component Placement
Guide—Top Silkscreen
_______________________________________________________________________________________
3
MAX2 4 7 2 /MAX2 4 7 3 Eva lu a t io n Kit s
1.0"
Figure 5. MAX2472/MAX2473 EV Kit PC Board Layout—V
1.0"
Figure 4. MAX2472/MAX2473 EV Kit PC Board Layout—Main
Ground Plane
CC
Plane
Evluate:/MAX2473
1.0"
Figure 6. MAX2472/MAX2473 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.
4
_____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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