19-3073; Rev 0; 11/03 MAX3558 Evaluation Kit Features ♦ 75Ω F-Connector Ports for Easy Testing ♦ Output Baluns Included for Easy Testing ♦ Jumpers for AGC and SHDN ♦ Fully Assembled and Tested Ordering Information PART TEMP RANGE IC PACKAGE MAX3558EVKIT CAUTION! ESD SENSITIVE DEVICE 0°C to +70°C 28 QFN-EP* (5mm x 5mm) *EP = Exposed paddle. Component Suppliers SUPPLIER PHONE FAX WEBSITE AVX 843-448-9411 803-626-3123 Coilcraft 847-639-6400 803-639-1469 www.coilcraft.com Murata 770-436-1300 770-436-3030 www.murata.com Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com TOKO 847-297-0070 847-699-7864 www.toko.com www.avxcorp.com Note: Please indicate that you are using the MAX3558 when contacting these component suppliers. Component List DESIGNATION QTY DESCRIPTION C1N–C4N, C1P–C4P, CINP, CPD, CA1–CA4 14 CM 1 Not installed CINN 1 0.01µF capacitor (0402) 0.01µF capacitors (0603) DESIGNATION QTY DESCRIPTION RB 1 LINP 1 1.1kΩ ±1% resistor (0603) 5.1nH inductor (0603) LB 1 82nH inductor (0603) FL1 1 470Ω EMI filter Murata BLM21AG471S T1–T4 4 Balun transformers Pulse CX2038 C1–C4 4 1000nF capacitors (0603) C6 1 33µF tantalum capacitor C7 1 2.2µF tantalum capacitor U1 1 MAX3558CGI 5 2-pin headers C8 1 0.1µF tantalum capacitor JPA1–JPA4, JPPD R1, R4, R21, R31, R41 86.6Ω ±1% resistors (0603) (not installed) JPRA, JPS1–JPS4 5 3-pin headers 5 TP1, GND, VCC 3 Test points R2, R3, R22, R32, R42 5 0Ω 0603 resistors OUT1–OUT4, RFIN 5 RA1 1 1kΩ ±1% 0603 resistor F-connectors Duplex CSA, Ltd. F-P225GD/D-DPX RA10 1 10kΩ ±1% 0603 resistor ________________________________________________________________ Maxim Integrated Products 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. 1 Evaluates: MAX3558 General Description The MAX3558 evaluation kit (EV kit) simplifies evaluation of the broadband LNA. It enables testing of the device’s RF performance and requires no additional support circuitry. The signal inputs and outputs use F-connectors to simplify the connection of RF test equipment. Each output includes a balun for differential-to-single-ended conversion. The EV kit is fully assembled and tested. Evaluates: MAX3558 MAX3558 Evaluation Kit Quick Start 5) The MAX3558 EV kit is fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. Figure 1 shows the schematics. Figures 2–7 are component placement guides and PC board layouts. 6) Test Equipment Required • An RF signal generator capable of delivering +13dBm of output power up to 900MHz • A spectrum analyzer covering the operating frequency range of the device • A +4.75V to +5.25V power supply that can source 500mA • A 0 to +3V adjustable DC supply that can source 1mA for AGC input • A voltmeter or multimeter for monitoring the powerdetector output • (Optional) An ammeter for measuring supply current • (Optional) A network analyzer for measuring gain and return loss Connections and Setup This section provides a step-by-step guide to operating the EV kit and testing the device’s functions. Do not turn on any DC power or RF signal generator until all connections are completed. LNA Output Testing 1) 2) 3) 4) 2 Make sure there are shunts installed on JPS2, JPS3, and JPS4 in the OFF position, and a shunt in the ON position for JPS1. This setting activates OUT1 while turning off the remaining outputs. Connect a DC power supply, preset to +5.0V, to VCC (through an ammeter if desired), and GND terminals on the EV kit. If available, set the current limit to 400mA. Connect an adjustable DC power supply, preset to +0V, to the JPA1 jumper and GND terminals on the EV kit. If available, set the current limit to 1mA. The JPA1 is the AGC1 input. 7) 8) 9) Connect the spectrum analyzer to the OUT1 Fconnector. Set the center frequency to 50MHz and set the span to 5MHz. Turn on the DC power supplies and the RF signal generator. Slowly increase the adjustable supply to +3V for the gain control. You should see the output signal on the spectrum analyzer. Adjust the voltage on the JPA1 pin to observe the gain-control range. When measuring the gain, be sure to account for balun losses (0.08dB at 50MHz), cable losses, and circuit board losses (0.1dB). 10) Repeat the steps for output OUT2 to OUT4, if desired. 11) (Optional) Another method for determining gain is by using a network analyzer. This has the advantage of displaying gain over a swept frequency band and input power. Refer to the network analyzer manufacturer’s user manual for setup details. Power-Detector Testing 1) If connected, remove the adjustable DC power supply connected to the JPA1. 2) Make sure there are shunts on JPPD, JPA1, JPRA (either side), and JPS1 is in the ON position. 3) Vary the signal generator’s output power to observe the LNA’s output power. Once the input power reaches the attack point, the LNA’s output power should be relatively constant. Layout The EV kit PC board can serve as a guide for layout using the MAX3558. Keep traces carrying RF signals as short as possible to minimize radiation and insertion loss due to the PC board. Keep the differential output traces together and of equal length to ensure signal amplitude balance. Solder the entire bottom side exposed paddle evenly to the board ground plane. Connect the RF signal generator to the RFIN Fconnector. Do not turn on the generator’s output. Set the generator for an output frequency of 50MHz. Set the level to +15dBmV. _______________________________________________________________________________________ MAX3558 Evaluation Kit Evaluates: MAX3558 Figure 1. MAX3558 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX3558 MAX3558 Evaluation Kit 1.0" Figure 2. MAX3558 EV Kit Component Placement Guide—Component Side 4 _______________________________________________________________________________________ MAX3558 Evaluation Kit Evaluates: MAX3558 1.0" 1.0" Figure 3. MAX3558 EV Kit PC Board Layout—Component Side 1.0" Figure 4. MAX3558 EV Kit PC Board Layout—Ground Plane 1 1.0" Figure 5. MAX3558 EV Kit PC Board Layout—Ground Plane 2 Figure 6. MAX3558 EV Kit PC Board Layout—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 _____________________ 5 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.