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| 19-1872; Rev 0; 1/01 MAX2654/MAX2655/MAX2656 Evaluation Kits 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. Features o Easy Evaluation of MAX2654/MAX2655/MAX2656 o +2.7V to +5.5V Single-Supply Operation o RF Input and Output Matched to 50 o Jumper Included for Gain/Shutdown Setting o Fully Assembled and Tested Evaluate: MAX2654/MAX2655/MAX2656 Ordering Information PART MAX2654EVKIT MAX2655EVKIT MAX2656EVKIT TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C IC PACKAGE 6 SC70-6 6 SC70-6 6 SC70-6 Component List MAX2654 DESIGNATION C1 C2 C3, C8 C4 C5 C6 R4 R5 L1 L2 U1 RFIN, RFOUT VCC, GND JU1 JU1 -- QTY 1 1 2 1 1 1 1 1 1 1 1 2 2 1 1 1 DESCRIPTION 6pF 0.5pF ceramic capacitor (0402), Murata GRM36COG060D050A 1.6pF 0.1pF ceramic capacitor (0402), Murata GRM36COG1R6B050A 100pF 5% ceramic capacitors (0603), Murata GRM36COG101J050 22pF 5% ceramic capacitor (0603), Murata GRM36COG220J050 4.7F tantalum capacitor `C' case AVX TAJC475K020 Not installed 0 resistor (0603) 10k 1% resistor (0402) 5.6nH inductor Murata LQW1608A5N6C00T1 0nH inductor (0402) MAX2654EXT 6-pin SC70 SMA connectors (edge mount) tab contact, EFJohnson 142-0701-851 Test points, Digi-Key 5000K-ND 1 3 header (0.1in centers) Digi-Key S1012-36-ND Shunt, Digi-Key S9000-ND MAX2654 EV kit circuit board, rev A R1 R2 R3 R4 R5 L1 Component List MAX2655 DESIGNATION C1 C2 C3, C8 C4 C5 C6 C7 QTY 1 1 2 1 1 1 1 1 1 1 1 1 1 DESCRIPTION 1800pF 10% ceramic capacitor (0402), Murata GRM36X7R182K050A 1.5pF 0.1pF ceramic capacitor (0603), Murata GRM39COG1R5B050A 100pF 5% ceramic capacitors (0402), Murata GRM36COG101J050A 12pF 5% ceramic capacitor (0603) Murata GRM39COG120J050A 4.7F tantalum capacitor `C' case AVX TAJC475K025 Not installed 27pF 5% ceramic capacitor (0402) Murata GRM36COG270J050A 698 1% resistor (0603) 511 1% resistor (0603) 357 1% resistor (0603) 0 resistor (0603) 10k 1% resistor (0402) 5.6nH inductor Murata LQW1608A5N6C00T1 ________________________________________________________________ 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. MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 Component List MAX2655 (continued) DESIGNATION L2 L3 U1 RFIN, RFOUT VCC, GND JU1 JU2, JU3, JU4 JU1, JU2, JU3, JU4 -- QTY 1 1 1 2 2 1 3 4 1 DESCRIPTION 0nH inductor (0402) 3.3nH inductor Toko LL1005-FH3N3J MAX2655EXT, 6-pin SC70 SMA connectors (edge mount) tab contact, EFJohnson 142-0701-851 Test points, Digi-Key 5000K-ND 1 3 header (0.1in centers) Digi-Key S1012-36-ND 1 2 header (0.1in centers) Digi-Key S1012-36-ND Shunts Digi-Key S9000-ND MAX2655 EV kit circuit board, rev B L2 U1 RFIN, RFOUT VCC, GND JU1 JU2, JU3, JU4 1 1 2 2 1 3 4 1 R5 L1 1 1 12k 1% resistor (0402) 4.7nH inductor Murata LQW1608A4N7C00T1 0nH inductor (0402) MAX2656EXT, 6-pin SC70 SMA connectors (edge mount) tab contact, Johnson 142-0701-851 Test points, Digi-Key 5000K-ND 1 3 header (0.1in centers) Digi-Key S1012-36-ND 1 2 headers (0.1in centers) Digi-Key S1012-36-ND Shunts Digi-Key S9000-ND MAX2655/MAX2656 EV kit circuit board, rev A R2 R3 R4 Component List MAX2656 (continued) DESIGNATION QTY 1 1 1 DESCRIPTION 511 1% resistor (0603) 392 1% resistor (0603) 0 resistor (0603) Component List MAX2656 DESIGNATION C1 C2 C3, C7, C8 C4 C5 C6 R1 QTY 1 1 3 1 1 1 1 DESCRIPTION 1800pF 10% ceramic capacitor (0402), Murata GRM36X7R182K050 1.2pF 0.1pF ceramic capacitor (0402) 100pF 5% ceramic capacitors (0402), Murata GRM36COG101J050 680pF 10% ceramic capacitor (0603), Murata GRM39X7R681K050 4.7F tantalum capacitor `C' case AVX TAJC475K025 Not installed 715 1% resistor (0603) JU1, JU2, JU3, JU4 -- 2 _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits Quick Start 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. 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. Evaluate: MAX2654/MAX2655/MAX2656 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 50 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) 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. 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. Component Suppliers SUPPLIER Coilcraft Murata Electronics Taiyo Yuden PHONE 847-639-6400 800-831-9172 800-348-2496 FAX 847-639-1469 814-238-0490 408-434-0375 WEB www. coilcraft.com www. murata.com www. t-yuden.com _______________________________________________________________________________________ 3 MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 VCC JU1 C8 100pF 0.017in WIDTH 0.035in LENGTH 1 GND RFOUT U1 MAX2654 GND GND 6 C6 OPEN 5 GND R5 L2 0nH 10k C3 100pF RFOUT SMA 2 C1 6pF C2 1.6pF RFIN SMA L1 5.6nH 3 RFIN VCC 4 C4 22pF R4 0 C5 4.7F VCC Figure 1. MAX2654 EV Kit Schematic VCC R3 357 R2 511 JU4 C8 100pF 1 C7 27pF 2 U1 MAX2655 GND GND 5 6 C6 OPEN R5 10k JU1 JU3 JU2 L3 L2 3.3nH 0nH BIAS RFOUT C3 100pF RFOUT SMA R1 698 GND C1 RFIN 1800pF SMA C2 1.5pF L1 5.6nH 3 RFIN VCC 4 C4 12pF R4 0 C5 4.7F VCC Figure 2. MAX2655 EV Kit Schematic 4 _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 VCC R3 392 R2 511 JU4 C8 100pF JU1 JU3 JU2 1 C7 100pF 2 BIAS RFOUT U1 MAX2656 6 C6 OPEN R5 L2 12k 0nH C3 100pF RFOUT SMA R1 715 GND GND 5 GND C1 RFIN 1800pF SMA C2 1.2pF L1 4.7nH 3 RFIN VCC 4 R4 0 C4 680pF C5 4.7F VCC Figure 3. MAX2656 EV Kit Schematic 1.0" Figure 4. MAX2654 EV Kit Component Placement Guide-- Component Side 1.0" Figure 5. MAX2654 EV Kit PC Board Layout--Component Side _______________________________________________________________________________________ 5 MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 1.0" Figure 6. MAX2654 EV Kit PC Board Layout--Ground Layer 2 1.0" Figure 7. MAX2654 EV Kit PC Board Layout--Ground Layer 3 1.0" Figure 8. MAX2654 EV Kit PC Board Layout--Solder Side 1.0" Figure 9. MAX2655 EV Kit Component Placement Guide-- Component Side 6 _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 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 1.0" Figure 13. MAX2655 EV Kit PC Board Layout--Solder Side _______________________________________________________________________________________ 7 MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 1.0" Figure 14. MAX2656 EV Kit Component Placement Guide-- Component Side 1.0" Figure 15. MAX2656 EV Kit PC Board Layout--Component Side 1.0" Figure 16. MAX2656 EV Kit PC Board Layout--Ground Layer 2 1.0" Figure 17. MAX2656 EV Kit PC Board Layout--Ground Layer 3 8 _______________________________________________________________________________________ MAX2654/MAX2655/MAX2656 Evaluation Kits Evaluate: MAX2654/MAX2655/MAX2656 1.0" 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 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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