19-2521; Rev 0; 7/02
Quadruple-Mode LNA/Mixer Evaluation Kits
General Description
The MAX2530/MAX2531/MAX2538 evaluation kits (EV
kits) simplify evaluation of the MAX2351/MAX2354/
MAX2358/MAX2359/MAX2530/MAX2531/MAX2537/
MAX2538 high-performance, silicon germanium (SiGe)
BiCMOS, quad-mode LNA/mixer ICs. They enable test-
ing of the devices’ RF performance and require no
additional support circuitry. The signal inputs and out-
puts use SMA connectors to simplify the connection of
RF test equipment.
The MAX2530/MAX2531/MAX2538 EV kits are assem-
bled with an associated IC and incorporate input- and
output-matching components optimized for the 869MHz
to 894MHz cellular frequency band, 1930MHz to
1990MHz PCS frequency band, 1575.42MHz GPS fre-
quency band, and 183.6MHz IF output frequency. All
matching components can be changed to work at other
frequencies.
Use the
Evaluation Kit Selector Guide
to determine which
EV kit to order based on the application. For example,
to evaluate the MAX2354, use the MAX2530EVKIT.
o
50Ω SMA Ports for Easy Testing
o
2.7V to 3.3V Single-Supply Operation
o
Matched to Cellular, PCS, and GPS Bands
o
Fully Assembled and Tested
Features
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Ordering Information
PART
MAX2530EVKIT
MAX2531EVKIT
MAX2538EVKIT
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
IC PACKAGE
28 QFN-EP*
28 QFN-EP*
28 QFN-EP*
*EP
= Exposed pad.
Component List
DESIGNATION
BAND, BUF_EN,
G1, G2, IF_SEL,
MODE, PLL_EN,
SHDN
C1, C2, C5, C9,
C10, C14
C3
C4
C6
C7, C8, C13, C24
C11
C12, C16
C15
QTY
DESCRIPTION
DESIGNATION
C17
8
3-pin headers
C25–C29
6
1
1
1
4
1
2
1
2.7pF ±0.1pF capacitors
Murata GRP1555C1H2R7B
8.2pF ±0.1pF capacitor
Murata GRP1555C1H8R2B
10µF, 16V capacitor
Panasonic ECS-T1CX106R
1.8pF ±0.1pF capacitor
Murata GRP1555C1H1R8B
1000pF ±10% capacitors
Murata GRP155R71H102K
1000nF ±10% capacitor
Murata GRM188F51A105Z
100pF ±5% capacitors
Murata GRP1555C1H101J
1.2pF ±0.1pF capacitor
Murata GRP1555C1H1R2B
CLNA_IN,
CLNA_OUT,
CMIX_IN, GLNA_IN,
GLNA_OUT,
GMIX_IN, GPS_IF,
IF1, IFO, LO_IN,
LO_OUT, PLL_OUT,
PLNA_IN,
PLNA_OUT,
PMIX_IN
GND, VCC
JU1, JU2
L1, L3, L6, L7, L8,
L13
L2, L14
L4
5
QTY
1
DESCRIPTION
2.4pF ±0.1pF capacitor
Murata GRP1555C1H2R4B
6800pF ±10% capacitors
Murata GRP155R71E682K
15
SMA connectors, edge mount
2
2
6
2
1
2-pin headers
2-pin headers
120nH ±5% inductors (0603)
Coilcraft 0603CS-R12XJB
3.3nH ±5% inductors (0402)
Coilcraft 0402CS-3N3XJB
1.0nH ±5% inductor (0402)
Coilcraft 0402CS-1N0XJB
________________________________________________________________
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.
Quadruple-Mode LNA/Mixer Evaluation Kits
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Component List (continued)
DESIGNATION
L5
R1, R3
R2
R4
R15
T1, T2, T3
QTY
1
2
1
1
1
3
DESCRIPTION
7.5nH ±5% inductor (0402)
Coilcraft 0402CS-7N5XJB
3.3kΩ ±1% resistors (0402)
8.2kΩ ±1% resistor (0402)
10kΩ ±5% resistor (0402)
20kΩ ±1% resistor (0402)
4:1 balun transformers
Toko 617DB-1018
MAX2530ETI for MAX2530EVKIT
MAX2531ETI for MAX2531EVKIT
MAX2538ETI for MAX2538EVKIT
• A power supply capable of 50mA at 2.7V to 3.3V
• (Optional) An ammeter for measuring the supply
current
• 50Ω SMA cables
• (Optional) A network analyzer (HP 8753D, for exam-
ple) to measure small-signal return loss and gain
Connections and Setup
This section provides a step-by-step guide to operating
the EV kits and testing the devices’ functions. Do not
turn on DC power or RF signal generators until all con-
nections are made.
Testing the LNA
1) Set the jumpers for the desired mode according to
Table 1 and Table 2.
2) Connect a DC supply (preset to 2.75V) to the V
CC
and GND terminals (through an ammeter, if desired)
on the EV kit.
3) Set the RF generator and spectrum analyzer to oper-
ate at the frequency of 881MHz for cellular,
1960MHz for PCS, or 1575.42MHz for GPS at a
power level of -30dBm.
4) Connect the output of the RF generator to the
respective LNA SMA connector, and connect the
coaxial cable from the LNA output SMA connector to
the spectrum analyzer.
5) Turn on the DC supply and activate the RF generator’s
output.
6) The signal that appears on the spectrum analyzer
should have a magnitude of approximately -15dBm
in high-gain mode.
7) (Optional) Another method for determining the gain
is using a network analyzer. This has the advantage
of displaying gain vs. a swept frequency band, in
addition to displaying input and output return loss.
Refer to the user manual of the network analyzer for
setup details.
Testing the Mixer
1) Set the jumpers for the desired mode according to
Table 1 and Table 2.
2) Connect a DC supply (preset to 2.75V) to the V
CC
and GND terminals (through an ammeter, if desired)
on the EV kit.
3) Set one RF generator for an output frequency
of 881MHz for cellular, 1960MHz for PCS, or
1575.42MHz for GPS at a power level of -30dBm.
Connect the output of this generator to the respec-
tive mixer input SMA connector.
U1
1
Evaluation Kit Selector Guide
TO EVALUATE
MAX2351
MAX2354
MAX2358
MAX2359
MAX2530
MAX2531
MAX2537
MAX2538
USE
MAX2531EVKIT
MAX2530EVKIT
MAX2538EVKIT
MAX2538EVKIT
MAX2530EVKIT
MAX2531EVKIT
MAX2538EVKIT
MAX2538EVKIT
Quick Start
The MAX2530/MAX2531/MAX2538 EV kits are fully
assembled and factory tested. Follow the instructions in
the
Connections and Setup
section for proper device
evaluation. Figure 1 shows the schematic. Figures 2
through 7 are component placement guides and PC
board layouts.
Test Equipment Required
This section lists the test equipment recommended to
verify operation of the MAX2530/MAX2531/MAX2538
EV kits. It is intended as a guide only, and some substi-
tutions are possible.
• Two RF signal generators capable of delivering
0dBm of output power up to 2.5GHz (HP 8648C or
equivalent)
• An RF spectrum analyzer capable of covering the
operating frequency range of the devices as well as
a few harmonics (HP 8561E, for example)
2
_______________________________________________________________________________________
Quadruple-Mode LNA/Mixer Evaluation Kits
4) Set a second RF generator output frequency
according to Table 3, and connect it to the LO input
port (LO_IN).
5) Connect the coaxial cable from the desired IF port
SMA connector to the spectrum analyzer. See Table
2 for IF port and jumper settings.
6) Set the spectrum analyzer center frequency to
183.6MHz.
7) Turn on the DC supply and activate the RF genera-
tors’ outputs.
8) The signal that appears on the spectrum analyzer
should have an amplitude of approximately -17dBm
in high-gain mode.
Layout
A good PC board layout is an essential part of an RF cir-
cuit design. The EV kit PC board can serve as a guide
for laying out a board using the MAX2351/MAX2354/
MAX2358/MAX2359/MAX2530/MAX2531/MAX2537/
MAX2538. Put a decoupling capacitor close to the
device’s VCC pin to minimize supply coupling. Proper
grounding of the GND pin is essential. Connect the
GND pin to the ground plane either directly or through
vias as close to the pin as possible. Keep traces carry-
ing RF signals as short as possible to minimize radiation
and insertion loss. Keep the differential mixer output
traces together and of equal length to ensure signal bal-
ance. Solder the entire bottom-side exposed pad evenly
to the board ground plane for proper device operation.
Run the LNA input trace on the top layer of the PC
board to avoid via-induced coupling. Minimize parallel
RF traces to improve coupling loss and isolation. Use
abundant ground vias between RF traces to minimize
undesired coupling.
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Table 1. Modes of Operation
BAND
OPERATING MODE
High gain/high linearity
High gain/low linearity
Cellular
Midgain
Low gain
Ultra-low gain
High gain/high linearity
PCS
Low gain
Ultra-low gain
GPS
GPS
IF_SEL
0 = IF0
1 = IF1
0 = IF0
1 = IF1
0 = IF0
1 = IF1
0 = IF0
1 = IF1
0 = IF0
1 = IF1
0 = IF0
1 = IF1
0 = IF0
1 = IF1
0 = IF0
1 = IF1
X
G2
LO
LO
LO
HI
HI
LO
HI
HI
LO
G1
LO
LO
HI
HI
LO
LO
HI
LO
LO
MODE
HI
LO
X
X
X
HI
X
X
LO
BAND
LO
LO
LO
LO
LO
HI
HI
HI
HI
X = Don’t care.
_______________________________________________________________________________________
3
Quadruple-Mode LNA/Mixer Evaluation Kits
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Table 2. Jumper Settings
NAME
BUF_EN
G1, G2, MODE, BAND
IF_SEL
JU1
JU2
PLL_EN
SHDN
FUNCTION
LO Buffer Enable. On enables the LO buffer output, off disables LO buffer.
Set device operating modes according to Table 1.
Selects IF Port. 0 selects IF0 port, 1 selects IF1 port.
V
CC
for PCS LNA. Can be used for monitoring the LNA current.
V
CC
for IF Ports. Can be used for monitoring the mixer current.
PLL Enable. On enables the PLL drive output, off disables the PLL drive output.
Shutdown. On for normal operation, off to shut down the device.
Table 3. LO input (LO_IN) Frequency for Mixer Testing
PART
MAX2530
MAX2531
MAX2538
CELL (MHz)
1064.6
1064.6
2129.2
PCS (MHz)
2143.6
1071.8
2143.6
GPS (MHz)
2087.73
1043.865
2087.73
LO GENERATION
—
LO multiplier
LO divider
Component Suppliers
SUPPLIER
AVX
Coilcraft
Murata
Taiyo Yuden
Toko
PHONE
843-448-9411
847-639-6400
770-436-1300
800-348-2496
847-297-0070
FAX
803-626-3123
803-639-1469
770-436-3030
847-925-0899
847-699-7864
WEBSITE
www.avxcorp.com
www.coilcraft.com
www.murata.com
www.t-yuden.com
www.toko.com
4
_______________________________________________________________________________________
IF1
4
T3
6
4:1
BALUN
PMIX_IN
PLNA_OUT
C3
8.2pF
VCC
VCC
BAND
JU1
2
C16
100pF
R3
3.3kΩ
28
24
CMIX_IN
GIF-
R2
8.2kΩ
2
PLNA_IN
GIF+
3
GND
19
L7
120nH
20
C8
1000pF
L6
120nH
21
IF1-
IF1+
C9
2.7pF
1
2
C10
2.7pF
3
4:1
BALUN
4
23
22
1
CLNA_OUT
PLNA_OUT
BAND
IF_SEL
PMIX_IN
27
26
25
L1
120nH
T2
1
L2
3.3nH
IF_SEL
C29
6800pF
L8
120nH
C7
JU2 1000pF
VCC
C2
2.7pF
C1
2.7pF
1
2
3
CMIX_IN
VCC
CLNA_OUT
GPS_IF
6
Figure 1. MAX2530/MAX2531/MAX2538 EV Kits Schematic
L4
1.0nH
C15
1.2pF
L5
7.5nH
IFO-
4
CLNA_IN
R1
3.3kΩ
IFO+
18
VCC
V
CC
6
GLNA_IN
LO_OUT
7
G1
GLNA_OUT
G2
GMIX_IN
MODE
11
12
R15
20kΩ
C28
6800pF
G2
GMIX_IN
MODE
VCC
BIAS
9
10
VCC
8
GLNA_OUT
BUFFEN
PLL
LO_IN
13
14
PLL_OUT
LO_IN
R4
10kΩ
VCC
BUF_EN
16
15
VCC
C11
1000nF
C4
10µF
GND
17
C12
100pF
LO_OUT
VCC
VCC
C13
1000pF
L13
120nH
U1
L3
120nH
2
C14
2.7pF
3
4:1
BALUN
4
C5
2.7pF
T1
1
6
IFO
5
SHDN
PLNA_IN
C25
6800pF
C26
CLNA_IN 6800pF
C17
2.4pF
VCC
MAX2530
MAX2531
MAX2538
SHDN
L14
3.3nH
C6
1.8pF
C27
GLNA_IN 6800pF
VCC
G1
PLL_EN
Quadruple-Mode LNA/Mixer Evaluation Kits
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
_______________________________________________________________________________________
C24
1000pF
5
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