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| 19-2204; Rev 0; 1/02 MAX2244/MAX2246 Evaluation Kits General Description The MAX2244/MAX2246 evaluation kits (EV kits) simplify evaluation of the MAX2244/MAX2245/MAX2246 power amplifiers (PAs). They enable testing of the devices' RF performance and require no additional support circuitry. The EV kits' signal inputs and outputs use SMA connectors to facilitate the connection of RF test equipment. The MAX2244 EV kit is assembled with a MAX2244 and incorporates output matching components optimized for 2.4GHz to 2.5GHz and approximately 22dBm output power. To evaluate the MAX2245, order samples from Maxim by calling 1-800-998-8800. The MAX2246 EV kit is assembled with a MAX2246 and is matched onboard to provide approximately 20dBm in the 2.4GHz band. o 3V to 3.6V Single-Supply Operation o Radio-Frequency Output Matched for Operation from 2.4GHz to 2.5GHz o Jumper for Easy Shutdown Control o Includes All Critical Peripheral Components Features o Easy Evaluation of the MAX2244/MAX2246 Evaluate: MAX2244/MAX2245/MAX2246 Ordering Information PART MAX2244EVKIT MAX2246EVKIT TEMP RANGE -40C to +85C -40C to +85C IC PACKAGE 9 UCSP 9 UCSP Component Suppliers SUPPLIER Digi-Key Kamaya Murata Electronics Toko PHONE 218-681-6674 219-489-1533 770-436-1300 408-432-8281 WEBSITE www.digikey.com www.kamaya.com www.murata.com www.toko.com MAX2244 Component List DESIGNATION C1 QTY 1 DESCRIPTION 10F tantalum capacitor, C case AVXTAJC106K016 10nF 10%, 10V min ceramic capacitor (0402) Murata GRP155R71E103K 1000pF 10%, 25V min ceramic capacitors (0402) Murata GRP155R71H102K 27pF 5% ceramic capacitor (0402) Murata GRP1555C1H270J 10pF 5% ceramic capacitors (0402) Murata GRP1555C1H100B 1.2pF 0.25pF ceramic capacitor (0402) Murata GRP1555C1H1R3B 5pF 0.25pF ceramic capacitor (0402) Murata GRP1555C1H5R0B DESIGNATION C10 QTY 1 DESCRIPTION 100pF 5% ceramic capacitor (0402) Murata GRP155C1H101K Connectors Digi-Key 500K-ND SMA connectors (edge mount) EFJohnson 142-0701-801 3-pin header, 0.1in center Digi-Key S1012-36-ND Shunt Digi-Key S9000-ND 8.2 5% resistors (0402) 1k 5% resistor (0402) MAX2244EBL 9-bump ultra chipscale package (UCSPTM) MAX2244 EV kit PC board MAX2244 data sheet C2 1 J1, J2, J5 J3, J4 JU1 JU1 R1, R3 R2 U1 None None 3 2 1 1 2 1 1 1 1 C3, C9, C11 3 C4 1 C5, C6 2 C7 1 C8 1 UCSP is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ 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. MAX2244/MAX2246 Evaluation Kits Evaluate: MAX2244/MAX2245/MAX2246 MAX2246 Component List DESIGNATION C1 QTY 1 DESCRIPTION 10F tantalum capacitor, C case AVXTAJC106K016 10nF 10% 10V min ceramic capacitor (0402) Murata GRP155R71E103K 1000pF 10% 25V min ceramic capacitors (0402) Murata GRP155R71H102K 27pF 5% ceramic capacitors (0402) Murata GRP1555C1H270J 10pF 0.1pF ceramic capacitors (0402) Murata GRP1555C1H100B 1.3pF 0.1pF ceramic capacitor (0402) Murata GRP1555C1H1R3B Connectors Digi-Key 500K-ND SMA connectors (edge mount) EFJohnson 142-0701-801 3-pin header, 0.1in center Digi-Key S1012-36-ND Shunt Digi-Key S9000-ND 8.2 5% resistors (0402) 1k 5% resistor (0402) MAX2246EBL 9-pin UCSP MAX2246 EV kit PC board MAX2246 data sheet * One RF signal generator capable of delivering at least 5dBm of output power at the operating frequency (HP 8648D or equivalent) One RF power sensor capable of handling at least 10dBm of output power at the operating frequency (HP 8482A or equivalent) One RF power meter capable of measuring up to 10dBm of output power at the operating frequency (HP 438A or equivalent) An RF spectrum analyzer that covers the MAX2244/ MAX2246 operating frequency range, as well as a few harmonics (HP 8562E, for example) A dual-output power supply capable of up to 0.25A at 3.0V to 3.6V and a supply capable of 0 to 2.5V at up to 10mA. An optional ammeter for measuring the supply current Two 50 SMA cables One SMA 20dB pad A network analyzer (HP 8753D, for example) to measure small-signal return loss and gain (optional) * C2 1 * * C3, C9, C11 3 * C4, C8, C10 3 * * * * C5, C6 2 C7 1 Connections and Setup This section is a step-by-step guide to operating the EV kits and testing the devices' function. Do not turn on the DC power or RF signal generators until all connections are made: 1) Connect a DC supply set to 3.0V (through an ammeter, if desired) to the VCC and GND terminals on the EV kit. Set the second DC supply voltage to 2.0V and connect to PC. Do not turn on the supply. 2) Connect one RF signal generator to the RFIN SMA connector. Do not turn on the generator's output. Set the generator for an output frequency of 2.45GHz at a power level of 2dBm. 3) Connect a 20dB pad to the RFOUT SMA connector on the EV kit to prevent overloading the power sensor and power meter. 4) Connect a power sensor to the 20dB pad. 5) Connect the power sensor to a power meter. Set the power meter offset to 20dB and frequency to 2.45GHz. 6) Ensure JU1 (SHUTDOWN) is in the ON position. First turn on the VCC supply, and then the PC supply. The VCC supply current should read approximately 60mA (MAX2244) or 35mA (MAX2246). 7) Activate the RF generator's output. For the MAX2244 EV kit, the output power should increase to approximately 22dBm with supply current rising J1, J2, J5 J3, J4 JU1 JU1 R1, R3 R2 U1 None None 3 2 1 1 2 1 1 1 1 Quick Start The MAX2244/MAX2246 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. To evaluate the MAX2245, order samples from Maxim by calling 1-800-998-8800. Test Equipment Required This section lists the recommended test equipment to verify operation of the MAX2244/MAX2245/MAX2246. It is intended only as a guide, and some substitutions are possible: 2 _______________________________________________________________________________________ MAX2244/MAX2246 Evaluation Kits to approximately 172mA. For the MAX2246 EV kit, output power is approximately 20dBm with a supply current of approximately 120mA. 8) Varying the DC supply voltage connected to PC between 0 and 2.5V varies the output power. Refer to the MAX2244/MAX2245/MAX2246 data sheet for more information. Keep traces carrying RF signals as short as possible to minimize radiation and insertion loss because of the PC board. Each VCC node on the PC board should have its own decoupling capacitor to minimize 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. Refer to the Layout section of the MAX2244/MAX2245/MAX2246 data sheet for more information. Evaluate: MAX2244/MAX2245/MAX2246 Layout Issues A good PC board is an essential part of an RF circuit design. The EV kit PC board can be a guide for laying out a board using the MAX2244/MAX2245/MAX2246. VCC J2 VCC J1 GND R1 8.2 C3 1000pF C4 27pF T4* 50, 5.3 L = 0.8mm VPC J5 PC A1 RFIN/ SHDN B1 C5 10pF VCC JU1 SHDN R2 1k VCC2 A2 T1* 50, 17.6 L = 2.7mm C11 1000pF C1 10F C2 10nF U1 MAX2244 GND A3 C10 100pF J3 SMA RFIN 50 GND B2 REFOUT B3 T2* C6 50, 50 10pF L = 7.6mm 50 J4 SMA RFOUT GND C1 VCC1 C2 GND C3 C7 1.2pF C8 5pF T3* 50, 5.3 L = 0.8mm C9 1000pF R3 8.2 *W = 0.254mm (10mils) ON FR4, 0.135mm (5.3mils) THICKNESS TO GROUND PLANE. Figure 1. MAX2244 EV Kit Schematic _______________________________________________________________________________________ 3 MAX2244/MAX2246 Evaluation Kits Evaluate: MAX2244/MAX2245/MAX2246 VCC J2 VCC J1 GND R1 8.2 C3 1000pF C4 27pF T4* 50, 8.9 L = 1.3mm VPC J5 PC A1 RFIN/ SHDN B1 C5 10pF VCC JU1 SHDN R2 1k VCC2 A2 T1* 50, 25.0 L = 3.8mm C11 1000pF C1 10F C2 10nF U1 MAX2246 GND A3 C10 27pF J3 SMA RFIN 50 GND B2 REFOUT B3 T2* C6 50, 50 10pF L = 7.6mm 50 J4 SMA RFOUT GND C1 VCC1 C2 GND C3 C7 1.3pF C8 27pF T3* 50, 5.3 L = 0.8mm C9 1000pF R3 8.2 *W = 0.254mm (10mils) ON FR4, 0.135mm (5.3mils) THICKNESS TO GROUND PLANE. Figure 2. MAX2246 EV Kit Schematic 4 _______________________________________________________________________________________ MAX2244/MAX2246 Evaluation Kits Evaluate: MAX2244/MAX2245/MAX2246 Figure 3. MAX2244 EV Kit Component Placement Guide--Component Side 1.0" 1.0" Figure 4. MAX2244 EV Kit PC Board Layout--Component Side Figure 5. MAX2244 EV Kit PC Board Layout--Ground Plane 5 _______________________________________________________________________________________ MAX2244/MAX2246 Evaluation Kits Evaluate: MAX2244/MAX2245/MAX2246 1.0" 1.0" Figure 6. MAX2244 EV Kit PC Board Layout--Power Plane Figure 7. MAX2244 EV Kit PC Board Layout--Solder Side Figure 8. MAX2246 EV Kit Component Placement Guide--Component Side 6 _______________________________________________________________________________________ MAX2244/MAX2246 Evaluation Kits Evaluate: MAX2244/MAX2245/MAX2246 1.0" 1.0" Figure 9. MAX2246 EV Kit PC Board Layout--Component Side Figure 10. MAX2246 EV Kit PC Board Layout--Ground Plane 1.0" 1.0" Figure 11. MAX2246 EV Kit PC Board Layout--Power Plane Figure 12. MAX2246 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 _____________________ 7 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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