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19-1583; Rev 1; 12/99
MAX2651/MAX2652/MAX2653 Evaluation Kits
General Description
The MAX2651/MAX2652/MAX2653 evaluation kits (EV kits)
simplify evaluation of the MAX2651/MAX2652/MAX2653
low-noise amplifiers (LNAs). The kits enable testing of the
devices’ RF performance and require no additional sup-
port circuitry. The signal inputs and outputs use SMA con-
nectors to facilitate the connection of RF test equipment.
The MAX2651/MAX2652 EV kits are assembled with a
MAX2651/MAX2652 and incorporate input and output
matching components optimized for RF frequencies of
925MHz to 960MHz (GSM band) and 1805MHz to
1880MHz (DCS band). The MAX2653 EV kit is assem-
bled with a MAX2653 and incorporates input and out-
put matching components optimized for the DCS band.
Features
o
Easy Evaluation of MAX2651/MAX2652/MAX2653
o
+2.7V to +3.3V Single-Supply Operation
o
GSM RF Input/Output Matched to 50Ω at 925MHz
to 960MHz (MAX2651/MAX2652)
o
DCS RF Input/Output Matched to 50Ω at 1805MHz
to 1880MHz
o
All Peripheral Components Included
Evaluate: MAX2651/MAX2652/MAX2653
Component Suppliers
SUPPLIER
Coilcraft
PHONE
847-639-6400
800-368-4923
219-489-1533
800-241-6574
FAX
847-639-1469
507-835-8356
219-489-2261
770-436-3030
WEB
www.
coilcraft.com
www.
efjohnson.com
www.
kamaya.com
www.
murata.com
www.
T-Yuden.com
Ordering Information
PART
MAX2651EVKIT
MAX2652EVKIT
MAX2653EVKIT
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
IC PACKAGE
10 µMAX
10 µMAX
8 µMAX
EF Johnson
Kamaya
Murata
Electronics
Taiyo Yuden 408-573-4150 408-573-4159
MAX2651 EV Kit Component List
DESIGNATION QTY
C1
C2
C3
C4, C5, C11
C6
C7, C8
C9
C10
C12
C13
DCSIN,
DCSOUT,
GSMIN,
GSMOUT
1
1
1
3
1
0
1
1
1
1
DESCRIPTION
68pF ±5% ceramic capacitor (0603)
Murata GRM39COG680J50
15pF ±5% ceramic capacitor (0603)
Murata GRM39COG150J50
1.5pF ±0.1pF ceramic capacitor (0603)
Murata GRM39COG1R5B50
220pF ±5% ceramic capacitors (0603)
Murata GRM39COG221J50
1.2pF ±0.1pF ceramic capacitor (0603)
Murata GRM39COG1R2B50
Not installed
2.2pF ±0.1pF ceramic capacitor (0603)
Murata GRM39COG2R2B50
100pF ±5% ceramic capacitor (0603)
Murata GRM39COG101J50V
0.01µF ±10% ceramic cap (0805)
47pF ±5% ceramic capacitor (0603)
Murata GRM39COG470J50
SMA connectors (PC edge mount)
EF Johnson 142-0701-801
R3
R5
U1
None
None
None
4
1
1
1
1
1
1
DESIGNATION QTY
L1, L5
L2
L4
R1, R4
R2
2
1
1
2
1
DESCRIPTION
8.2nH ±5% air-core inductors (0603)
Murata LQG11A8N2J00
3.9nH ±0.3nH inductor (0603)
Murata LQG11A3N9S00
2.2nH ±0.3nH inductor (0603)
Murata LQG11A2N2S00
910Ω ±5% resistors (0603)
Kamaya RMC16911JT
330Ω ±5% resistor (0603)
Kamaya RMC16331JT
180Ω ±5% resistor (0603)
Kamaya RMC16181JT
0Ω resistor (0402)
Kamaya RMC16S000JT
MAX2651EUB
MAX2651 EV kit PC board
MAX2651 data sheet
MAX2651 EV kit data sheet
________________________________________________________________
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.
MAX2651/MAX2652/MAX2653 Evaluation Kits
Evaluate: MAX2651/MAX2652/MAX2653
MAX2652 EV Kit Component List
DESIGNATION QTY
BAND, GAIN,
GND, SHDN,
VCC,
C1, C5, C6,
C12
C2
C3
C4
C7
C8, C13
C9
C10
C11
5
DESCRIPTION
Test points
Mouser 151-203
220pF ±5% ceramic capacitors (0603)
Murata GRM39COG221J050 or
Taiyo Yuden UMK107CH221JZ
68pF ±5% ceramic capacitor (0603)
Murata GRM39COG680J050 or
Taiyo Yuden UMK107CH680JZ
5.6pF ±0.25pF ceramic capacitor (0603)
Murata GRM39COG5R6C050
1.1pF ±0.1pF ceramic capacitor (0603)
Murata GRM40X7R105K010
1.2pF ±0.1pF ceramic capacitor (0603)
Murata GRM39COG1R2B050
Not installed
1µF ±10% MAX ceramic capacitor
(0805) Murata GRM39COG2R2B50 or
Taiyo Yuden LMK212BJ105KG
2.2pF ±0.1pF ceramic capacitor
(0603) Murata GRM39COG2R2B050
100pF ±5% ceramic capacitor (0603)
Murata GRM39COG101J050 or
Taiyo Yuden UMK107CH101JZ
C14
DCSIN,
DCSOUT,
GSMIN,
GSMOUT
JU1, JU2, JU3
L1
L2
L4
L5
R1, R2, R5
R3
R4
R6
U1
None
None
None
None
1
47pF ±5% ceramic capacitor (0603)
Murata GRM39COG470J050 or
Taiyo Yuden UMK107CH470JZ
SMA connectors (PC edge mount)
EF Johnson 142-0701-801 or
Digi-Key J502-ND
3-pin headers
6.8nH ±5% inductor (0603)
Murata LQG11A6N8J00
3.3nH ±0.3nH inductor (0603)
Murata LQG11A3N3S00
2.2nH ±0.3nH inductor (0603)
Murata LQG11A2N2S00
8.2nH ±5% inductor (0603)
Murata LQG11A8N2J00
910Ω ±5% resistors (0603)
Not installed
240Ω ±5% resistor (0603)
0Ω ±5% resistor (0402)
MAX2652EUB (10 µMAX)
Shunts (JU1, JU2, JU3)
MAX2652 EV kit PC board
MAX2652 data sheet
MAX2652 EV kit data sheet
4
3
1
1
1
1
3
0
1
1
1
3
1
1
1
4
1
1
1
1
0
1
1
1
MAX2653 EV Kit Component List
DESIGNATION QTY
C1, C7
C2
C3
C4
C5, C8
C6
C9
C10
2
1
1
1
0
1
1
1
DESCRIPTION
100pF ±5% ceramic capacitors (0603)
Murata GRM39COG101J50
1.5pF ±0.1pF ceramic capacitor (0603)
Murata GRM39COG1R5B50
47pF ±5% ceramic capacitor (0603)
Murata GRM39COG470J50
1.0pF±0.1pF ceramic capacitor (0603)
Murata GRM39COG010B50
Not installed
150pF ±5% ceramic capacitor (0805)
Murata GRM40COG151J50
2200pF ±5% ceramic capacitor (0603)
Murata GRM39X7R222J50
0.01µF ±5% ceramic capacitor (0603)
Murata GRM39X7R103J50
DESIGNATION QTY
DCSIN,
DCSOUT
L1
L3
R1, R3
R2
R4
U1
None
None
None
1
1
1
2
1
1
1
1
1
1
DESCRIPTION
SMA connector (PC edge mount)
EF Johnson 142-0701-801
3.3nH ±0.3nH inductor (0603)
Murata LQG11A3N3S00
2.7nH ±0.3nH inductor (0603)
Murata LQG11A2N7S00
1kΩ ±5% resistors (0603)
Kamaya RMC16102JT
330Ω ±5% resistor (0603)
Kamaya RMC16331JT
0Ω resistor (0603)
Kamaya RMC16000JT
MAX2653EUA
MAX2653 EV kit PC board
MAX2653 data sheet
MAX2653 EV kit data sheet
2
_______________________________________________________________________________________
MAX2651/MAX2652/MAX2653 Evaluation Kits
Test Equipment Required
This section lists the required test equipment to verify
operation of the MAX2651/MAX2652/MAX2653. It is
intended as a guide only; some substitutions are possi-
ble.
•
An RF signal generator capable of delivering at least
0dBm of output power up to 2.5GHz (HP 8648C or
equivalent)
An RF spectrum analyzer that covers the operating
frequency range plus a few harmonics (HP 8561E,
for example)
A power supply capable of up to 25mA at +2.7V to
+3.3V
An optional ammeter for measuring the supply cur-
rent
Two 50Ω SMA cables
A noise-figure meter (HP 8970B, for example) to
measure noise figure (optional)
A network analyzer (HP 8753D, for example) to
measure return loss and gain (optional)
5) For the MAX2651/MAX2652 EV kits only, connect a
jumper wire between the EV kit’s BAND input and
VCC (DCS mode).
6) Turn on the DC supply. If using an ammeter, the
supply current should read approximately 5.7mA for
the MAX2651, 7.0mA for the MAX2652, and 5.4mA
for the MAX2653.
7) Activate the RF generator’s output. A signal on the
spectrum analyzer’s display should indicate a typical
gain of 18dB for the MAX2651/MAX2653 and 17dB
for the MAX2652 after accounting for cable, board,
and connector losses. (Board and connector loss
correction is typically 0.3dB for the DCS gain test.)
Low-Gain Mode
8) Deactivate the signal generator’s output. Remove
the jumper wire between the GAIN input and VCC,
and reconnect the jumper wire between the GAIN
input and ground (low-gain mode). If using a current
meter, the supply current should now read approxi-
mately 2.2mA
9) Activate the RF generator’s output. A signal on the
spectrum analyzer’s display should indicate a typi-
cal gain of -2dB after accounting for cable and
board losses.
10) Another method for determining gain is to use a net-
work analyzer. This has the advantage of displaying
gain over a swept frequency band, in addition to
displaying input and output return loss. Refer to the
network analyzer manufacturer’s user manual for
setup details (optional).
Evaluate: MAX2651/MAX2652/MAX2653
•
•
•
•
•
•
Connections and Setup
The MAX2651/MAX2652/MAX2653 EV kits are fully
assembled and factory tested. This section provides a
step-by-step guide to operating the EV kits and testing
the devices’ functions.
Do not turn on the DC power or
RF signal generator until all connections are made.
Checking Power Gain (DCS Band)
For the MAX2651/MAX2652 EV kits, ensure that the
GSMIN and GSMOUT ports are terminated into 50Ω.
High-Gain Mode
1) Connect a +3VDC supply (through an ammeter if
desired) to the EV kit’s VCC and GND terminals. Do
not turn on the supply.
2) Connect an RF signal generator to the DCSIN SMA
connector; do not turn on the generator’s output.
Set the generator for an output frequency of
1850MHz at a power level of -30dBm.
3) Connect a spectrum analyzer to the EV kit’s
DCSOUT SMA connector. Set the analyzer to a cen-
ter frequency of 1850MHz, a total span of 200MHz,
and a reference level of 0dBm.
4) Connect a jumper wire between the EV kit’s GAIN
input and VCC (high-gain mode).
Checking Power Gain
(GSM Band, MAX2651/MAX2652 EV Kits Only)
Ensure that the DCSIN and DCSOUT ports are terminat-
ed into 50Ω.
High-Gain Mode
1) Connect a +3VDC supply (through a current meter
if desired) to the EV kit’s VCC and GND terminals.
Do not turn on the supply.
2) Connect an RF signal generator to the GSMIN SMA
connector; do not turn on the generator’s output.
Set the generator for an output frequency of
945MHz at a power level of -30dBm.
3) Connect a spectrum analyzer to the EV kit’s
GSMOUT SMA connector. Set the analyzer to a
center frequency of 945MHz, a total span of
200MHz, and a reference level of 0dBm.
_______________________________________________________________________________________
3
MAX2651/MAX2652/MAX2653 Evaluation Kits
Evaluate: MAX2651/MAX2652/MAX2653
4) Connect a jumper wire between the EV kit’s GAIN
input and VCC (high-gain mode).
5) Connect a jumper wire between the EV kit’s BAND
input and ground (GSM mode).
6) Turn on the DC supply. If using an ammeter, the
supply current should read approximately 5.9mA
for the MAX2651 and 7.2mA for the MAX2652.
7) Activate the RF generator’s output. A signal on the
spectrum analyzer’s display should indicate a typi-
cal gain of 18dB after accounting for cable and
board losses. (Board and connector loss correction
is typically 0.3dB for the GSM gain test.)
Low-Gain Mode
8) Deactivate the signal generator’s output. Remove
the jumper wire between the GAIN input and VCC,
and reconnect the jumper wire between the GAIN
input and ground (low-gain mode). If using a current
meter, the supply current should now read approxi-
mately 2.2mA for the MAX2651 and 2.4mA for the
MAX2652.
9) Activate the RF generator’s output. A signal on the
spectrum analyzer’s display should indicate a typi-
cal gain of -2dB after accounting for cable and
board losses.
10) Another method for determining gain is to use a
network analyzer. This has the advantage of dis-
playing gain over a swept frequency band, in addi-
tion to displaying input and output return loss. Refer
to the network analyzer manufacturer’s user manual
for setup details (optional).
Checking Noise Figure
Noise-figure measurements on low-noise devices are
extremely sensitive to board and lab setup losses/para-
sitics. The specified MAX2651/MAX2652/MAX2653 noise-
figure values (refer to the MAX2651/MAX2652/MAX2653
data sheet) have board and connector losses subtracted
out. (Board and connector loss correction is typically
0.1dB for the DCS band noise figure test and is negligible
for GSM.) There are many techniques/precautions for
measuring a noise figure. A detailed explanation of these
items goes beyond the scope of this document. For more
information on how to perform this level of noise-figure
measurement, refer to the noise-figure meter’s operating
manual as well as Hewlett Packard Application Note #57-1.
Layout Considerations
A good PC board is an essential part of an RF circuit
design. The EV kit PC board can serve as a guide for lay-
ing out a board using the MAX2651/MAX2652/MAX2653.
Each VCC node on the PC board should have 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 VCC node on the circuit
has a separate connection to a central VCC node, can
further minimize coupling between sections of the IC.
4
_______________________________________________________________________________________
MAX2651/MAX2652/MAX2653 Evaluation Kits
Evaluate: MAX2651/MAX2652/MAX2653
R4
910Ω
C11
220pF
9
R3
180Ω
C10
100pF
8
L5
8.2nH
C8
OPEN
7
R2
330Ω
6
L4
2.2nH
C5
220pF
C6
1.2pF
VCC
R5
0Ω
C7
OPEN
VCC
C12
0.01µF
SMA
DCSOUT
VCC
GAIN
C9
2.2pF
SMA
GSMOUT
1
GND
GAIN
10
SMA
GSMIN
C2
15pF
C1
68pF
2
L1
8.2nH
GSMIN
GSMOUT
U1
MAX2651
3
GND
V
CC
SMA
DCSIN
C13
47pF
C3
1.5pF
L2
3.9nH
4
DCSIN
DCSOUT
BAND
R1
910Ω
5
C4
220pF
BAND
GND
Figure 1. MAX2651 EV Kit Schematic
1.0"
1.0"
Figure 2. MAX2651 EV Kit Component Placement Guide
Figure 3. MAX2651 EV Kit PC Board Layout—Component Side
_______________________________________________________________________________________
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