MAX2470EVKIT [MAXIM]
All Critical Peripheral Components Included;
| 型号： | MAX2470EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | All Critical Peripheral Components Included |
| 文件： | 总4页 (文件大小：101K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4797; Rev 0; 2/99
MAX2 4 7 0 /MAX2 4 7 1 Eva lu a t io n Kit s
Evluate:0/MAX2471
Ge n e ra l De s c rip t io n
Co m p o n e n t Lis t s
The MAX2470/MAX2471 evaluation kits (EV kits) simplify
the evaluation of the MAX2470/MAX2471 VCO buffer
amplifiers. They enable testing of the devices’ perfor-
mance and require no additional support circuitry. All
inputs and outputs use SMA connectors to facilitate easy
connection of RF test equipment.
Co m m o n Co m p o n e n t s fo r
MAX2 4 7 0 /MAX2 4 7 1 EV Kit s
DESIGNATION QTY
DESCRIPTION
2200pF, 10%, 25V ceramic-chip
capacitors (0603)
C1, C2, C3, C5
C6
4
1
2
3
2
The MAX2470 EV kit is assembled with the MAX2470
and provides one high-impedance input (with pads to
terminate to 50Ω) and a pair of matched 50Ω differential
outputs. JU1 sets the logic level at the HI/LO bias-control
input, allowing for selection between 10MHz to 500MHz
and 10MHz to 200MHz operation. The MAX2471 EV kit is
assembled with the MAX2471 and provides two high-
impedance inputs (with pads to terminate to 50Ω) and a
pair of matched 50Ω differential outputs.
10µF, 10%, 10V tantalum capacitor
AVX TAJC106K016
Optional 50Ω input-termination resis-
tors (0603) (not installed)
R3, R4
SMA connectors (PC top mount)
E.F. Johnson 142-0701-216
J1, J2, J3
J5, J6
Test points
Mouser 151-203
None
None
1
1
MAX2470/2471EVKIT PC board
MAX2470/MAX2471 EV kit manual
Fe a t u re s
♦ Easy Evaluation of MAX2470/MAX2471
♦ +2.7V to +5.5V Single-Supply Operation
Ad d it io n a l Co m p o n e n t s fo r
MAX2 4 7 0 EV Kit
♦ On-Board Input-Frequency Range Selection
(MAX2470)
DESIGNATION QTY
DESCRIPTION
♦ Single-Ended (MAX2470) or
2200pF, 10%, 25V ceramic-chip
capacitor (0603)
C7
1
1
1
Differential (MAX2471) Inputs
♦ All Critical Peripheral Components Included
3-pin header (0.100" centers)
Digi-key S1012-36-ND
JU1
JU1
Shunt (jumper)
Digi-key S9000-ND
Ord e rin g In fo rm a t io n
R1
R2
U1
1
1
1
0Ω, 5% chip resistor (0603)
1kΩ, 5% chip resistor (0603)
MAX2470EUT
IC
SOT
PART
TEMP. RANGE
PACKAGE TOP MARK
MAX2470EVKIT -40°C to +85°C
MAX2471EVKIT -40°C to +85°C
SOT23-6
SOT23-6
AAAX
AAAY
Ad d it io n a l Co m p o n e n t s fo r
MAX2 4 7 1 EV Kit
Co m p o n e n t S u p p lie rs
DESIGNATION QTY
DESCRIPTION
SUPPLIER
PHONE
FAX
URL
2200pF, 10%, 25V ceramic-chip
capacitor (0603)
C4
1
http://www.avx-
corp.com
AVX
803-946-0690 803-626-3123
SMA connector (PC top mount)
E.F. Johnson 142-0701-216
J4
1
1
http://www.ef
johnson.com
E.F. Johnson 402-474-4800 402-474-4858
U1
MAX2471EUT
________________________________________________________________ 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 0 /MAX2 4 7 1 Eva lu a t io n Kit s
3) For a differential power-gain measurement, connect
_________________________Qu ic k S t a rt
a balun between the outputs of the buffer and the
spectrum analyzer.
The MAX2470/MAX2471 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.
An a lys is
Ad jus t the fre q ue nc y s p a n, c e nte r fre q ue nc y, a nd
amplitude of the spectrum analyzer to observe the sig-
nal peak at 200MHz; the output signal power should
re a d a p p roxima te ly -6d Bm for the MAX2470 a nd
-5dBm for the MAX2471.
Te s t Eq u ip m e n t Re q u ire d
This section lists the recommended test equipment to
verify the operation of the MAX2470/MAX2471. It is
intended as a guide only, and some substitutions are
possible.
_______________ De t a ile d De s c rip t io n
• One DC power supply capable of supplying a mini-
mum of 10mA at +2.7V to +5.5V.
This section describes the circuitry surrounding the IC
in the MAX2470/MAX2471 EV kits. For more detailed
information about the device operation, please consult
the MAX2470/MAX2471 data sheet.
• One RF spectrum analyzer capable of making mea-
s ure me nts ove r the b a nd wid th of the MAX2470/
MAX2471 a nd a fe w ha rmonic s , s uc h a s the HP
8561E.
Figure 1 is the schematic for the MAX2470/MAX2471 EV
kits. Capacitors C1, C2, C3, and C4 are 2200pF DC-
blocking capacitors; this value contributes minimal reac-
tance to the signal paths, down to 10MHz. Capacitors C5
• One RF signal generator capable of delivering 0dBm
output power at 500MHz, such as the HP 8648C sig-
nal generator.
and C6 form the V
decoupling network. Note the
CC
location of each component; a relatively large 10µF tan-
• Two baluns with a 2:1 turns ratio and an operating
range encompassing 10MHz to 500MHz, such as the
Macom model number 96341 180° hybrid (balun).
Fully diffe re ntia l me a sure me nts for the MAX2470
require a single 180° hybrid at the output. Fully differ-
ential measurements for the MAX2471 require two
180° hybrids: one at the input, and one at the output.
talum capacitor, C6, is located near the V connector.
CC
Near to C6, a much smaller 2200pF decoupling capaci-
tor, C5, reduces any high-frequency interference.
The EV kit includes pads for R3 and R4 that can facili-
tate simple termination of the input(s). For the MAX2470
EV kit, R2 and C7 provide high-frequency filtering to
prevent excess noise from coupling into the IC.
Evluate:0/MAX2471
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 less than +5.5V
and is off before connecting the supply to the EV kit.
A good starting point is +3.0V. Connect the power
On the MAX2470 EV kit, jumper JU1 selects the state of
the HI/LO input on the MAX2470. Selecting the “LO”
setting optimizes the MAX2470 for input frequencies
from 10MHz to 200MHz. Selecting the “HI” setting opti-
mizes the MAX2470 for input frequencies from 10MHz
to 500MHz.
supply between V and GND and turn it on.
CC
2) Se t the outp ut p owe r of the s ig na l g e ne ra tor to
-20dBm at 200MHz. Disable the output, then con-
nect the output of the signal generator to the IN SMA
connector of the MAX2470 EV kit board. For the
MAX2471, use a balun between the signal generator
and the differential inputs (IN and IN).
2
_______________________________________________________________________________________
MAX2 4 7 0 /MAX2 4 7 1 Eva lu a t io n Kit s
Evluate:0/MAX2471
C5
C6
2200pF
10µF
C1
2200pF
J1
6
1
OUT
V
CC
R3
50Ω
OUT
C3
2200pF
MAX2470
MAX2471
J3
5
4
2
3
IN
GND
OUT
IN
C4
2200pF
C2
2200pF
J2
J4
IN
(HI/LO)
OUT
R1
0Ω
C7
2200pF
IN
R4
50Ω
V
CC
R2
1k
JU1
HI/LO
GND
( ) ARE FOR MAX2470
Figure 1. MAX2470/MAX2471 EV Kit Schematic
_______________________________________________________________________________________
3
MAX2 4 7 0 /MAX2 4 7 1 Eva lu a t io n Kit s
1.0"
Figure 2. MAX2470/MAX2471 EV Kit Component Placement
Guide—Component Side
Evluate:0/MAX2471
1.0"
1.0"
Figure 3. MAX2470/MAX2471 EV Kit PC Board Layout—
Ground Plane
Figure 4. MAX2470/MAX2471 EV Kit PC Board Layout—
Component 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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