19-1872; Rev 0; 1/01 MAX2654/MAX2655/MAX2656 Evaluation Kits Features ♦ Easy Evaluation of MAX2654/MAX2655/MAX2656 ♦ +2.7V to +5.5V Single-Supply Operation ♦ RF Input and Output Matched to 50Ω ♦ Jumper Included for Gain/Shutdown Setting ♦ Fully Assembled and Tested Ordering Information PART TEMP. RANGE IC PACKAGE MAX2654EVKIT -40°C to +85°C 6 SC70-6 MAX2655EVKIT -40°C to +85°C 6 SC70-6 MAX2656EVKIT -40°C to +85°C 6 SC70-6 Component List MAX2654 Component List MAX2655 DESIGNATION QTY DESCRIPTION DESIGNATION QTY C1 1 6pF ±0.5pF ceramic capacitor (0402), Murata GRM36COG060D050A C1 1 1800pF ±10% ceramic capacitor (0402), Murata GRM36X7R182K050A C2 1 1.6pF ±0.1pF ceramic capacitor (0402), Murata GRM36COG1R6B050A C2 1 1.5pF ±0.1pF ceramic capacitor (0603), Murata GRM39COG1R5B050A C3, C8 2 100pF ±5% ceramic capacitors (0603), Murata GRM36COG101J050 C3, C8 2 100pF ±5% ceramic capacitors (0402), Murata GRM36COG101J050A C4 1 22pF ±5% ceramic capacitor (0603), Murata GRM36COG220J050 C4 1 12pF ±5% ceramic capacitor (0603) Murata GRM39COG120J050A C5 1 4.7µF tantalum capacitor ‘C’ case AVX TAJC475K020 C5 1 4.7µF tantalum capacitor ‘C’ case AVX TAJC475K025 C6 1 Not installed C6 1 Not installed R4 1 0Ω resistor (0603) C7 1 R5 1 10kΩ ±1% resistor (0402) 27pF ±5% ceramic capacitor (0402) Murata GRM36COG270J050A 1 698Ω ±1% resistor (0603) 1 5.6nH inductor Murata LQW1608A5N6C00T1 R1 L1 R2 1 511Ω ±1% resistor (0603) L2 1 0nH inductor (0402) R3 1 357Ω ±1% resistor (0603) U1 1 MAX2654EXT 6-pin SC70 R4 1 0Ω resistor (0603) RFIN, RFOUT 2 SMA connectors (edge mount) tab contact, EFJohnson 142-0701-851 R5 1 10kΩ ±1% resistor (0402) VCC, GND 2 Test points, Digi-Key 5000K-ND L1 1 5.6nH inductor Murata LQW1608A5N6C00T1 JU1 1 1 ✕ 3 header (0.1in centers) Digi-Key S1012-36-ND JU1 1 Shunt, Digi-Key S9000-ND — 1 MAX2654 EV kit circuit board, rev A DESCRIPTION ________________________________________________________________ Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Evaluate: MAX2654/MAX2655/MAX2656 General Description The MAX2654/MAX2655/MAX2656 evaluation kits (EV kits) simplify evaluation of the MAX2654/MAX2655/ MAX2656 low-noise amplifiers (LNAs). These kits enable testing of the devices’ performance and require no additional support circuitry. The signal input and output use SMA connectors to facilitate connection of RF test equipment. The MAX2654/MAX2655/MAX2656 EV kits are fully assembled with the MAX2654/MAX2655/MAX2656 on board, and incorporate input matching components optimized for specific frequency operation. Evaluate: MAX2654/MAX2655/MAX2656 MAX2654/MAX2655/MAX2656 Evaluation Kits Component List MAX2655 (continued) DESIGNATION QTY L2 1 L3 DESCRIPTION DESIGNATION QTY 0nH inductor (0402) R2 1 511Ω ±1% resistor (0603) 1 3.3nH inductor Toko LL1005-FH3N3J R3 1 392Ω ±1% resistor (0603) R4 1 0Ω resistor (0603) U1 1 MAX2655EXT, 6-pin SC70 1 12kΩ ±1% resistor (0402) 2 SMA connectors (edge mount) tab contact, EFJohnson 142-0701-851 R5 RFIN, RFOUT L1 1 4.7nH inductor Murata LQW1608A4N7C00T1 L2 1 0nH inductor (0402) U1 1 MAX2656EXT, 6-pin SC70 RFIN, RFOUT 2 SMA connectors (edge mount) tab contact, Johnson 142-0701-851 VCC, GND 2 Test points, Digi-Key 5000K-ND JU1 1 1 ✕ 3 header (0.1in centers) Digi-Key S1012-36-ND JU2, JU3, JU4 3 1 ✕ 2 headers (0.1in centers) Digi-Key S1012-36-ND JU1, JU2, JU3, JU4 4 Shunts Digi-Key S9000-ND — 1 MAX2655/MAX2656 EV kit circuit board, rev A VCC, GND 2 Test points, Digi-Key 5000K-ND JU1 1 1 ✕ 3 header (0.1in centers) Digi-Key S1012-36-ND JU2, JU3, JU4 3 1 ✕ 2 header (0.1in centers) Digi-Key S1012-36-ND JU1, JU2, JU3, JU4 4 Shunts Digi-Key S9000-ND — 1 MAX2655 EV kit circuit board, rev B Component List MAX2656 DESIGNATION 2 Component List MAX2656 (continued) QTY DESCRIPTION C1 1 1800pF ±10% ceramic capacitor (0402), Murata GRM36X7R182K050 C2 1 1.2pF ±0.1pF ceramic capacitor (0402) C3, C7, C8 3 100pF ±5% ceramic capacitors (0402), Murata GRM36COG101J050 C4 1 680pF ±10% ceramic capacitor (0603), Murata GRM39X7R681K050 C5 1 4.7µF tantalum capacitor ‘C’ case AVX TAJC475K025 C6 1 Not installed R1 1 715Ω ±1% resistor (0603) DESCRIPTION _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits The MAX2654/MAX2655/MAX2656 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. Test Equipment Required • An RF signal generator capable of delivering -30dBm of output power and a frequency range covering the MAX2654/MAX2655/MAX2656 (1400MHz to 2000MHz, for example) • An RF spectrum analyzer that covers the operating frequency range • A DC power supply capable of supplying +2.7V to +5.5V • Two 50Ω coaxial cables with SMA connectors • An ammeter to measure supply current (optional) • A noise figure meter (optional) • A network analyzer for measuring gain and return loss (optional) Connections and Setup Checking Power Gain 1) Connect a DC supply (preset to +3.0V) to the VCC and GND terminals (through an ammeter, if desired) on the EV kit. 2) Set the RF generator for a desired frequency at a power level of -30dBm. Connect the RF generator’s output to the RFIN SMA connector. 3) Connect the coaxial cable from the RFOUT SMA connector to the spectrum analyzer. 4) Turn on the DC supply. The supply current should read approximately 6mA for MAX2654, 8mA for MAX2655, and 11mA for MAX2656. 5) Activate the RF generator’s output. A signal on the spectrum analyzer’s display should indicate a typical gain as shown on the device data sheet after accounting for cable and board losses. 6) Optional: For the MAX2656, set the jumper JU2 to the VCC position. The power gain should now be about 1dB. 7) Optional: Another method of 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 and output return loss. Refer to the user manual of the network analyzer for setup details. Checking Noise Figure Noise figure measurements on low-noise devices are extremely sensitive to board and lab setup losses and parasitics. There are many techniques and precautions for measuring low noise figure. A detailed explanation of these items would exceed the scope of this document. Take into account PC board and external components loss when performing noise-figure measurements. The typical input losses on these EV kits is 0.2dB at 1575MHz and 0.25dB at 1960MHz. For more information on how to perform this level of noise-figure measurement, refer to the noise-figure meter operating manual and to Hewlett Packard’s application note #57-2, Noise Figure Measurement Accuracy. Layout Considerations Good PC board layout is an essential part of an RF circuit’s design. The EV kit PC board can serve as a guide for laying out a board using the MAX2654/ MAX2655/MAX2656. Generally, the VCC node on the PC board should have a decoupling capacitor located close to the device, and additional capacitors may be needed for long V CC lines. This minimizes supply coupling. Proper grounding of the GND pins is essential. Connect the GND pins to the ground plane either directly, through vias, or both. For MAX2654, connect pin 1 to the PC board ground plane through a 0.017in width by 0.035in length line. Component Suppliers SUPPLIER PHONE FAX WEB Coilcraft 847-639-6400 847-639-1469 www. coilcraft.com Murata Electronics 800-831-9172 814-238-0490 www. murata.com Taiyo Yuden 800-348-2496 408-434-0375 www. t-yuden.com _______________________________________________________________________________________ 3 Evaluate: MAX2654/MAX2655/MAX2656 Quick Start Evaluate: MAX2654/MAX2655/MAX2656 MAX2654/MAX2655/MAX2656 Evaluation Kits VCC JU1 C8 100pF R5 L2 0nH 10kΩ 0.017in WIDTH ✕ 0.035in LENGTH 1 2 RFIN C1 6pF L1 5.6nH SMA 3 GND RFOUT C6 OPEN U1 MAX2654 GND GND RFIN 6 C3 100pF RFOUT SMA VCC GND 5 R4 0Ω 4 C5 4.7µF C4 22pF C2 1.6pF VCC Figure 1. MAX2654 EV Kit Schematic VCC R3 357Ω JU4 R2 511Ω JU3 R5 10kΩ C8 100pF JU2 1 2 C1 RFIN 1800pF L1 5.6nH SMA C2 1.5pF BIAS RFOUT 6 C7 27pF R1 698Ω 3 RFIN C3 100pF RFOUT SMA C6 OPEN U1 MAX2655 GND L3 L2 3.3nH 0nH JU1 GND VCC GND 5 R4 0Ω 4 C4 12pF VCC C5 4.7µF Figure 2. MAX2655 EV Kit Schematic 4 _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 VCC R3 392Ω JU4 R2 511Ω JU3 JU1 C8 100pF JU2 1 BIAS RFOUT 6 C7 100pF R1 715Ω 2 C1 RFIN 1800pF L1 4.7nH SMA 3 RFIN C2 1.2pF C3 100pF RFOUT SMA C6 OPEN U1 MAX2656 GND R5 L2 12kΩ 0nH GND VCC GND 5 4 R4 0Ω C4 680pF VCC C5 4.7µF Figure 3. MAX2656 EV Kit Schematic 1.0" 1.0" Figure 4. MAX2654 EV Kit Component Placement Guide— Component Side Figure 5. MAX2654 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 5 Evaluate: MAX2654/MAX2655/MAX2656 MAX2654/MAX2655/MAX2656 Evaluation Kits 1.0" Figure 6. MAX2654 EV Kit PC Board Layout—Ground Layer 2 1.0" Figure 8. MAX2654 EV Kit PC Board Layout—Solder Side 6 1.0" Figure 7. MAX2654 EV Kit PC Board Layout—Ground Layer 3 1.0" Figure 9. MAX2655 EV Kit Component Placement Guide— Component Side _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits 1.0" Figure 10. MAX2655 EV Kit PC Board Layout—Component Side 1.0" Figure 11. MAX2655 EV Kit PC Board Layout—Ground Layer 2 1.0" Figure 12. MAX2655 EV Kit PC Board Layout—Ground Layer 3 Figure 13. MAX2655 EV Kit PC Board Layout—Solder Side _______________________________________________________________________________________ 7 Evaluate: MAX2654/MAX2655/MAX2656 1.0" Evaluate: MAX2654/MAX2655/MAX2656 MAX2654/MAX2655/MAX2656 Evaluation Kits 1.0" Figure 14. MAX2656 EV Kit Component Placement Guide— Component Side 1.0" Figure 16. MAX2656 EV Kit PC Board Layout—Ground Layer 2 8 1.0" Figure 15. MAX2656 EV Kit PC Board Layout—Component Side 1.0" Figure 17. MAX2656 EV Kit PC Board Layout—Ground Layer 3 _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits Figure 18. MAX2656 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. 9 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Evaluate: MAX2654/MAX2655/MAX2656 1.0"