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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 testing of the devices' RF performance and require no additional support circuitry. The signal inputs and outputs use SMA connectors to simplify the connection of RF test equipment. The MAX2530/MAX2531/MAX2538 EV kits are assembled 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 frequency 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 50 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 -40C to +85C -40C to +85C -40C to +85C 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 10F, 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
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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
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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 3.3k 1% resistors (0402) 8.2k 1% resistor (0402) 10k 5% resistor (0402) 20k 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 * 50 SMA cables * (Optional) A network analyzer (HP 8753D, for example) 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 connections 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 VCC and GND terminals (through an ammeter, if desired) on the EV kit. 3) Set the RF generator and spectrum analyzer to operate 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 VCC 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 respective 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 substitutions 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)
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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 generators' 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 circuit 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 carrying 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 balance. 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.
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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. VCC for PCS LNA. Can be used for monitoring the LNA current. VCC 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
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IF1 4 T3 6
4:1 BALUN PMIX_IN PLNA_OUT C3 8.2pF VCC VCC BAND JU1 2 C16 100pF R3 3.3k 28 24 CMIX_IN GIFR2 8.2k 2 PLNA_IN GIF+ 3 GND 19 L7 120nH 20 C8 1000pF L6 120nH 21 IF1IF1+ 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 IFO4 CLNA_IN R1 3.3k IFO+ 18 VCC VCC 6 GLNA_IN LO_OUT 7 G1 GLNA_OUT G2 GMIX_IN MODE 11 12 R15 20k 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 10k VCC BUF_EN 16 15 VCC C11 1000nF C4 10F 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
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C24 1000pF
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Quadruple-Mode LNA/Mixer Evaluation Kits Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
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1.0"
Figure 2. MAX2530/MAX2531/MAX2538 EV Kits Component Placement Guide--Component Side
Figure 3. MAX2530/MAX2531/MAX2538 EV Kits PC Board Layout--Component Side
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1.0"
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
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Quadruple-Mode LNA/Mixer Evaluation Kits Evaluate: MAX2351/4/8/9/MAX2530/1/7/8
1.0"
1.0"
Figure 6. MAX2530/MAX2531/MAX2538 EV Kits PC Board Layout--Ground Plane Layer 3
Figure 7. MAX2530/MAX2531/MAX2538 EV Kits Component Placement Guide--Solder 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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