19-2587; Rev 0; 7/02 MAX2840/MAX2841 Evaluation Kits Features ♦ Easy Evaluation of the MAX2840/MAX2841 ♦ +2.7V to +3.6V Single-Supply Operation ♦ Include All Critical Peripheral Components Ordering Information PART TEMP RANGE MAX2840EVKIT -40°C to +85°C IC PACKAGE 3 × 4 UCSP™ MAX2841EVKIT -40°C to +85°C 3 × 4 UCSP UCSP is a trademark of Maxim Integrated Products, Inc. MAX2840 Component List DESIGNATION QTY C1 1 C2, C18, C19 C13 C14 C15 C16 C17 C20, C22 C21 DESCRIPTION DESIGNATION QTY 100pF ±5% capacitor (0402) Murata GRP1555C1H101J C23 1 0.1µF ±10% capacitor (0603) Murata GRM188R71C104K 3 1000pF ±10% capacitors (0402) Murata GRP155R71H102K C24 1 10µF ±10% tantalum capacitor AVX TAJB106K010 1 5pF ±0.1pF capacitor (0402) Murata GRP1555C1H5R0B J8, J9 2 1 6.8pF ±0.1pF capacitor (0402) Murata GRP1555C1H6R8B SMA connectors, edge mount, tab contact EFJohnson 142-0701-851 or Digi-Key J658-ND JU4, JU5, J7, J10 4 Test points Digi-Key 5000K-ND 1 1.2pF ±0.1pF capacitor (0402) Murata GRP1555C1H1R2B Note: Location of this capacitor is critical. JU6 1 2-pin header, in line, 100-mil centers Digi-Key S1012-36-ND L1 1 5.6nH ±0.5nH inductor (0603) Murata LQW18AN5N6D00 1 18pF ±5% capacitor (0402) Murata GRP1555C1H180J 1 0.6pF ±0.1pF capacitor (0402) ATC ATC650L0R6BW Note: Location of this capacitor is critical. 2 1 10pF ±0.1pF capacitors (0402) Murata GRP1555C1H100B 3pF ±0.1pF capacitor (0402) Murata GRP1555C1H3R0B DESCRIPTION R1 1 5kΩ ±5% resistor (0402) R2 1 10kΩ ±1% resistor (0402) R4 1 100kΩ ±1% resistor (0402) MAX2840EBC 3 × 4 UCSP U2 2 None 1 MAX2840 EV kit circuit board, rev 3 None 1 MAX2840/MAX2841 data sheet None 1 MAX2840/2841 EV kit data sheet ________________________________________________________________ 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 Evaluate: MAX2840/MAX2841 General Description The MAX2840/MAX2841 evaluation kits (EV kits) simplify evaluation of the MAX2840/MAX2841 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. MAX2840/MAX2841 Evaluation Kits Evaluate: MAX2840/MAX2841 MAX2841 Component List DESIGNATION QTY C1 1 100pF ±5% capacitor (0402) Murata GRP1555C1H101J C2, C18, C19 3 1000pF ±10% capacitors (0402) Murata GRP155R71H102K C13 1 5pF ±0.1pF capacitor Murata GRP1555C1H5R0B C14 1 6.8pF ±0.1pF capacitor (0402) Murata GRP1555C1H6R8B 1 1.2pF ±0.1pF capacitor (0402) Murata GRP1555C1H1R2B Note: Location of this capacitor is critical. 1 18pF ±5% capacitor (0402) Murata GRP1555C1H180J C15 C16 C17 C20, C22 C21 C23 1 2 DESCRIPTION 1.0pF ±0.1pF capacitor (0402) ATC ATC650L1R0BW Note: Location of this capacitor is critical. 10pF ±0.1pF capacitors (0402) Murata GRP1555C1H100B 1 3pF ±0.1pF capacitor (0402) Murata GRP1555C1H3R0B 1 0.1µF ±10% capacitor (0603) Murata GRM188R71C104K Quick Start The MAX2840/MAX2841 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. Test Equipment Required This section lists the recommended test equipment to verify operation of the MAX2840/MAX2841. It is intended as a guide only, and some substitutions are possible: • One RF signal generator capable of delivering at least +5dBm OFDM modulated output power at the operating frequency (HPE4433B, Yokogawa 703230D or equivalent) • One RF power sensor capable of handling at least +20dBm of modulated output power at the operating frequency (HP 8481D or equivalent) • One RF power meter capable of measuring up to 2 DESIGNATION QTY DESCRIPTION C24 1 10µF ±10% tantalum capacitor AVX TAJB106K016 J8, J9 2 SMA connectors, edge mount, round contacts EFJohnson 142-0701-801 or Digi-Key J502-ND JU4, JU5, J7, J10 4 Test points, Digi-Key 5000K-ND JU6 1 2-pin header, in line, 100 mil centers Digi-Key S1012-36-ND L1 1 5.6nH ±0.5nH inductor (0603) Murata LQW18AN5N6D00 R1 1 5kΩ ±5% resistor (0402) R2 1 10kΩ ±1% resistor (0402) R3 1 330Ω ±1% resistor (0402) R4 1 100kΩ ±1% resistor (0402) R5 1 10Ω ±1% resistor (0402) U2 2 MAX2841EBC 3 × 4 UCSP None 1 MAX2841 EV kit circuit board, rev 3 None 1 MAX2840/MAX2841 data sheet None 1 MAX2840/MAX2841 EV kit data sheet +20dBm of output power at the operating frequency (HP 437B or equivalent) • An RF spectrum analyzer that covers the MAX2840/MAX2841 operating frequency range, as well as a few harmonics (FSEB20, for example) • A power supply capable of up to 1A at +2.7V to +5.0V • A power supply with a 0 to +3.0V output range • Two 50Ω SMA cables • One 20dB high-power attenuator • (Optional) One ammeter for measuring the supply current • (Optional) A network analyzer (HP 8753D, for example) to measure small-signal return loss and gain _______________________________________________________________________________________ MAX2840/MAX2841 Evaluation Kits 7) Connect jumper JU1 to make SHDN = VCC. 8) Turn on the DC supply. The supply current should read approximately 120mA (MAX2840) or 165mA (MAX2841). 9) Activate the RF generator’s output. The power meter should read approximately +15dBm (MAX2840) or +18dBm (MAX2841). 10) (Optional) Another method for determining gain is by using a network analyzer. This has the advantage of displaying gain vs. a swept-frequency band, in addition to displaying input return loss. Refer to the network analyzer manufacturer’s user manual for setup details. Layout Issues A good PC board 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 MAX2840/MAX2841. Keep traces carrying RF signals as short as possible to minimize radiation and insertion loss. Use impedance control on all RF signal traces. The VCC node on the PC board should have decoupling capacitors to the closest ground. Refer to the Layout section of the MAX2840/MAX2841 data sheet for more information. Component Suppliers PHONE FAX ATC SUPPLIER 949-583-9119 949-583-9213 www.atc.com WEBSITE AVX 843-448-9411 843-448-7139 www.avxcorp.com Digi-Key 800-344-4539 218-681-3380 www.digikey.com Murata Electronics 770-436-1300 770-436-3030 www.murata.com _______________________________________________________________________________________ 3 Evaluate: MAX2840/MAX2841 Connections and Setup This section provides 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 +3.3V (through an ammeter if desired) to the VCC and GND terminals on the EV kit. Do not turn on the supply. 2) Connect a DC supply set to +1.6V (MAX2840) or 1.9V (MAX2841) to the bias-control terminal (JU4) on the EV kit. Do not turn on the supply. 3) Connect one RF signal generator to the RFIN SMA connector. Do not turn on the generator’s output. Set the generator to 5.25GHz output frequency and output power of -9dBm (MAX2840) or -5dBm (MAX2841). 4) Connect a 20dB high-power attenuator to the RFOUT SMA connector on the EV kit. This prevents overloading of the power sensor and the power meter. 5) Connect a power sensor to the 20dB high-power attenuator. 6) Connect the power sensor to a power meter. Set the power meter offset to 20dB and frequency. For better accuracy, measure the actual offset. µF µF kΩ VCC MAX2840 kΩ kΩ nH Evaluate: MAX2840/MAX2841 MAX2840/MAX2841 Evaluation Kits Figure 1. MAX2840 EV Kit Schematic 4 _______________________________________________________________________________________ MAX2840/MAX2841 Evaluation Kits µF Ω µF Ω kΩ VCC MAX2841 kΩ kΩ nH Evaluate: MAX2840/MAX2841 Figure 2. MAX2841 EV Kit Schematic _______________________________________________________________________________________ 5 Evaluate: MAX2840/MAX2841 MAX2840/MAX2841 Evaluation Kits 1.0" Figure 3. MAX2840 EV Kit Component Placement Guide—Component Side 6 _______________________________________________________________________________________ MAX2840/MAX2841 Evaluation Kits Evaluate: MAX2840/MAX2841 1.0" 1.0" Figure 4. MAX2840 EV Kit PC Board Layout—Layer 2 Figure 5. MAX2840 EV Kit PC Board Layout—Layer 3 1.0" 1.0" Figure 6. MAX2840 EV Kit PC Board Layout—Primary Component Side Figure 7. MAX2840 EV Kit PC Board Layout—Secondary Side _______________________________________________________________________________________ 7 Evaluate: MAX2840/MAX2841 MAX2840/MAX2841 Evaluation Kits 1.0" Figure 8. MAX2841 EV Kit Component Placement Guide—Component Side 8 _______________________________________________________________________________________ MAX2840/MAX2841 Evaluation Kits 1.0" Figure 9. MAX2841 EV Kit PC Board Layout—Layer 2 1.0" Figure 10. MAX2841 EV Kit PC Board Layout—Layer 3 1.0" Figure 11. MAX2841 EV Kit PC Board Layout—Primary Component Side Figure 12. MAX2841 EV Kit PC Board Layout—Secondary 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 _____________________ 9 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Evaluate: MAX2840/MAX2841 1.0"