MAX2538EVKIT ,Quadruple-Mode LNA/Mixer Evaluation KitsEvaluate: MAX2351/4/8/9/MAX2530/1/7/819-2521; Rev 0; 7/02Quadruple-Mode LNA/Mixer Evaluation Kits
MAX253CPA ,Transformer Driver for Isolated RS-485 InterfaceMAX25319-0226; Rev 0; 1/94Transformer Driver forIsolated RS-485 Interface_______________
MAX253CPA+ ,1W Primary-Side Transformer H-Bridge Driver for Isolated SuppliesApplicationsMAX253ESA -40°C to +85°C 8 SOIsolated RS-485/RS-232 Power-SupplyMAX253ESA/V -40°C to +8 ..
MAX253CSA ,Transformer Driver for Isolated RS-485 InterfaceApplicationsMAX253CPA 0°C to +70°C 8 Plastic DIPIsolated RS-485/RS-232 Power-Supply MAX253CSA 0°C t ..
MAX253CSA ,Transformer Driver for Isolated RS-485 InterfaceGeneral Description ________
MAX253CSA ,Transformer Driver for Isolated RS-485 InterfaceFeaturesThe MAX253 is a monolithic oscillator/power-driver,' Power-Supply Transformer Driver for Is ..
MAX5920BESA ,-48V Hot-Swap Controller with External RSENSEFeaturesThe MAX5920A/MAX5920B are hot-swap controllers that Allows Safe Board Insertion and Remova ..
MAX5921AESA+T ,-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown CurrentELECTRICAL CHARACTERISTICS(V = 0V, V = 48V, T = -40°C to +85°C, unless otherwise noted. Typical val ..
MAX5921BESA ,-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown CurrentApplicationsMAX5921AESA -40°C to +85°C 8 SOTelecom Line CardsMAX5921BESA -40°C to +85°C 8 SONetwork ..
MAX5921BESA+ ,-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown Currentfeatures over these devices.and Current SpikesThe MAX5921/MAX5939 provide a controlled turn-on to♦ ..
MAX5921BESA+ ,-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown CurrentFeaturesThe MAX5921/MAX5939 hot-swap controllers allow a cir-♦ Allows Safe Board Insertion and Remo ..
MAX5921EESA+ ,-48V Hot-Swap Controllers with External RSENSE and High Gate Pulldown CurrentApplicationsMAX5921AESA -40°C to +85°C 8 SOTelecom Line CardsMAX5921BESA -40°C to +85°C 8 SONetwork ..
MAX2538EVKIT
Quadruple-Mode LNA/Mixer Evaluation Kits
General DescriptionThe 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 Guideto determine which
EV kit to order based on the application. For example,
to evaluate the MAX2354, use the MAX2530EVKIT.
Features50ΩSMA Ports for Easy Testing2.7V to 3.3V Single-Supply OperationMatched to Cellular, PCS, and GPS BandsFully Assembled and Tested
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Quadruple-Mode LNA/Mixer Evaluation Kits19-2521; Rev 0; 7/02
Component List
Ordering Information*EP = Exposed pad.
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Quadruple-Mode LNA/Mixer Evaluation Kits
Quick StartThe MAX2530/MAX2531/MAX2538 EV kits are fully
assembled and factory tested. Follow the instructions in
the Connections and Setupsection for proper device
evaluation. Figure 1 shows the schematic. Figures 2
through 7 are component placement guides and PC
board layouts.
Test Equipment RequiredThis 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)A power supply capable of 50mA at 2.7V to 3.3V(Optional) An ammeter for measuring the supply
current 50ΩSMA cables(Optional) A network analyzer (HP 8753D, for exam-
ple) to measure small-signal return loss and gain
Connections and SetupThis 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 LNASet the jumpers for the desired mode according to
Table 1 and Table 2.Connect a DC supply (preset to 2.75V) to the VCC
and GND terminals (through an ammeter, if desired)
on the EV kit.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.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.Turn on the DC supply and activate the RF generator’s
output.The signal that appears on the spectrum analyzer
should have a magnitude of approximately -15dBm
in high-gain mode.(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 MixerSet the jumpers for the desired mode according to
Table 1 and Table 2.Connect a DC supply (preset to 2.75V) to the VCC
and GND terminals (through an ammeter, if desired)
on the EV kit.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.
Set a second RF generator output frequencyaccording to Table 3, and connect it to the LO input
port (LO_IN).Connect the coaxial cable from the desired IF port
SMA connector to the spectrum analyzer. See Table
2 for IF port and jumper settings.Set the spectrum analyzer center frequency to
183.6MHz.Turn on the DC supply and activate the RF genera-
tors’ outputs.The signal that appears on the spectrum analyzer
should have an amplitude of approximately -17dBm
in high-gain mode.
LayoutA 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
Quadruple-Mode LNA/Mixer Evaluation Kits
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Quadruple-Mode LNA/Mixer Evaluation Kits
Table 3. LO input (LO_IN) Frequency for Mixer Testing
Component Suppliers
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Quadruple-Mode LNA/Mixer Evaluation Kits
Figure 2. MAX2530/MAX2531/MAX2538 EV Kits Component
Placement Guide—Component Side
Figure 3. MAX2530/MAX2531/MAX2538 EV Kits PC Board
Layout—Component Side
Figure 4. MAX2530/MAX2531/MAX2538 EV Kits PC Board
Layout—Solder Side
Figure 5. MAX2530/MAX2531/MAX2538 EV Kits PC Board
Layout—Ground Plane Layer 2
Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
Quadruple-Mode LNA/Mixer Evaluation Kits
