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MAX2622/MAX2623/MAX2624 Evaluation Kits
General Description
The MAX2622/MAX2623/MAX2624 evaluation kits
(EV kits) simplify evaluation of the MAX2622/MAX2623/
MAX2624 VCOs. These kits enable testing of the
devices’ RF performance and require no additional
support circuitry. The signal output uses an SMA con-
nector to facilitate the connection to RF test equipment.
The MAX2622 EV kit is assembled with the MAX2622
and incorporates output matching components opti-
mized for an RF frequency of 868MHz. The MAX2623
EV kit is assembled with the MAX2623 and incorporates
output matching components optimized for an RF fre-
quency of 917MHz. The MAX2624 EV kit is assembled
with the MAX2624 and incorporates output matching
components optimized for an RF frequency of 973MHz.
Features
o
Easy Evaluation of MAX2622/MAX2623/MAX2624
o
+2.7V to +3.3V Single-Supply Operation
o
RF Output Matched to 50Ω
o
All Critical Peripheral Components Included
Evaluate: MAX2622/MAX2623/MAX2624
Ordering Information
PART
MAX2622EVKIT
MAX2623EVKIT
MAX2624EVKIT
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 µMAX
8 µMAX
Component List
DESIGNATION QTY
C2, C7
C3, C4, C8
C5
C6
R1
R2
OUT
JU1
U1
2
2
1
1
1
1
1
4
1
DESCRIPTION
0.1µF ±5% ceramic capacitors (0603)
Taiyo Yuden EMK107BJ104KA
100pF ±5% ceramic capacitors (0603)
Murata GRM39C0G101J50
See Table 1 in
Applications Information
in MAX2622 data sheet.
See Table 1 in
Applications Information
in MAX2622 data sheet.
680Ω ±5% resistor (0603)
1kΩ ±5% resistor (0603)
SMA connector (PC edge-mount)
EF Johnson 142-0701-801 or
Digi-Key J502-ND
3-pin headers
MAX2622EUA, MAX2623EUA, or
MAX2624EUA
Quick Start
The MAX2622/MAX2623/MAX2624 EV kits are fully
assembled and factory tested. Follow the instructions in
the
Connections and Setup
section for proper device
evaluation.
Test Equipment Required
This section lists the recommended test equipment to
verify operation of the MAX2622/MAX2623/MAX2624. It
is intended as a guide only, and some substitutions are
possible.
•
•
•
A 2-channel power supply at +2.7V to +3.3V
An ammeter (optional)
An RF spectrum analyzer that covers the operating
frequency range of the MAX2622/MAX2623/
MAX2624 as well as a few harmonics (HP 8561E,
for example)
A 50Ω SMA cable
•
Connections and Setup
This section provides a step-by-step guide to the func-
tions and operation of these EV kits.
1) Connect a DC supply set to +3V (through an amme-
ter, if desired) to the V
CC
and GND terminals on the
EV kit.
2) Apply +3V to the
SHDN
control input.
3) Turn on the DC supply. The supply current should
read about 9mA.
4) Connect the VCO output to a spectrum analyzer
with a 50Ω coaxial cable.
5) Apply a variable DC voltage to the TUNE input
(+0.4V to +2.4V).
Component Suppliers
SUPPLIER
Murata Electronics
Taiyo Yuden
USA PHONE
800-831-9172
408-573-4150
USA FAX
814-238-0490
408-573-4159
________________________________________________________________
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.
MAX2622/MAX2623/MAX2624 Evaluation Kits
Evaluate: MAX2622/MAX2623/MAX2624
6) Check f
MIN
and f
MAX
on the spectrum analyzer by
varying the tuning voltage.
7) Check the output power level (-8dBm typ).
its own decoupling capacitor. This minimizes supply
coupling from one section of the IC to another. A star
topology for the supply layout, in which each V
CC
node
on the circuit has a separate connection to a central
V
CC
node on the circuit, can further minimize coupling
between sections of the circuit board.
Layout Considerations
The EV kit PC board can serve as a guide for laying out
a board using the MAX2622/MAX2623/MAX2624.
Generally, each V
CC
node on the PC board should have
8
N.C.
GND
R1
680Ω
TUNE
C2
0.1µF
2
TUNE
7
U1
OUT
C5
1pF
6
V
CC
C4
100pF
C6
2pF
SMA
OUT
MAX2622
3
V
CC
R2
1k
GND
1
SHDN
3
2
JU1
4
SHDN
C8
100pF
V
CC
5
C3
100pF
C7
0.1µF
V
CC
Figure 1. MAX2622 EV Kit Schematic
8
N.C.
GND
R1
680Ω
TUNE
C2
0.1µF
2
TUNE
7
U1
OUT
C5
1pF
C6
1.5pF
SMA
OUT
MAX2623
3
V
CC
R2
1k
GND
6
V
CC
C4
100pF
2
JU1
4
SHDN
3
C8
100pF
5
C3
100pF
C7
0.1µF
1
SHDN
V
CC
V
CC
Figure 2. MAX2623 EV Kit Schematic
2
_______________________________________________________________________________________
MAX2622/MAX2623/MAX2624 Evaluation Kits
Evaluate: MAX2622/MAX2623/MAX2624
8
N.C.
GND
R1
680Ω
TUNE
C2
0.1µF
2
TUNE
7
U1
OUT
C5
0.7pF
C6
1.3pF
SMA
OUT
MAX2624
3
V
CC
R2
1k
GND
6
V
CC
C4
100pF
2
JU1
4
SHDN
3
C8
100pF
5
C3
100pF
C7
0.1µF
1
SHDN
V
CC
V
CC
Figure 3. MAX2624 EV Kit Schematic
1.0"
Figure 4. MAX2622//MAX2623/MAX2624 EV Kit Component
Placement Guide—Component Side
_______________________________________________________________________________________
3
MAX2622/MAX2623/MAX2624 Evaluation Kits
Evaluates: MAX2622/MAX2623/MAX2624
1.0"
Figure 5. MAX2622//MAX2623/MAX2624 EV Kit PC Board
Layout—Component Side
1.0"
Figure 6. MAX2622/MAX2623/MAX2624 EV Kit PC Board
Layout—Ground Plane
4
_______________________________________________________________________________________
MAX2622/MAX2623/MAX2624 Evaluation Kits
NOTES
Evaluate: MAX2622/MAX2623/MAX2624
5
_______________________________________________________________________________________

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