19-2592; Rev 0; 9/02 MAX9987/MAX9988 Evaluation Kits Features ♦ Fully Assembled and Tested This document provides a list of equipment required to evaluate the device, a straight-forward test procedure to verify functionality, a circuit schematic for the EV kits, a bill of materials (BOM) for the EV kits, and artwork for each layer of the PC boards. ♦ Isolated PLL Output (+3dBm) ♦ Two-Way Power Splitting ♦ +14dBm to +20dBm Output Power ♦ ±1dB Output Power Variation ♦ Low Output Noise -170dBc/Hz at +17dBm ♦ 40dB Reverse Isolation ♦ More than 30dB Output-to-Output Isolation ♦ 160mA Supply Current at +17dBm ♦ ESD Protection Ordering Information Component Suppliers SUPPLIER Johnson Murata PHONE WEBSITE 507-833-8822 www.johnsoncomponents.com 770-436-1300 www.murata.com TEMP RANGE PART IC FREQUENCY PACKAGE RANGE (MHz) MAX9987EVKIT -40°C to +85°C 20 QFN 700 to1100 MAX9988EVKIT -40°C to +85°C 20 QFN 1500 to 2200 MAX9988 Component List MAX9987 Component List DESIGNATION QTY 0.1µF ±5% capacitors (0603) Murata GRM188R71C104K C1, C3, C6 3 0.1µF ±5% capacitors (0603) Murata GRM188R71C104K 10 47pF ±5% capacitors (0603) Murata GRM1885C1H470J C2, C4, C5, C7, C8, C9, C12–C15 10 22pF ±5% capacitors (0603) Murata GRM1885C1H220J C3 1 100pF ±5% capacitors (0603) Murata GRM1885C1H101J C10, C11 2 10pF ±5% capacitors (0603) Murata GRM1885C1H100J C10, C11 2 5pF ±0.25pF capacitors (0603) Murata GRM1885C11H5R0C J1–J4 4 J1–J4 4 PC board edge-mount SMA connectors (Flat tab launch) Johnson 142-0741-856 PC board edge-mount SMA connectors (Flat tab launch) Johnson 142-0741-856 R1, R2, R4, R5 4 Not installed R3 1 100Ω ±5% resistor (0603) R1, R2, R4, R5 4 Not installed R3 1 100Ω ±5% resistor (0603) TP1 1 Large test point for 0.062in PC board (red) Mouser 151-107 TP1 1 Large test point for 0.062in PC board (red) Mouser 151-107 TP2 1 Large test point for 0.062in PC board (black) Mouser 151-103 TP2 1 Large test point for 0.062in PC board (black) Mouser 151-103 U1 1 MAX9988EGP-T U1 1 MAX9987EGP-T DESIGNATION QTY C1, C6 2 C2, C4, C5, C7, C8, C9, C12–C15 DESCRIPTION DESCRIPTION ________________________________________________________________ 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: MAX9987/MAX9988 General Description The MAX9987/MAX9988 evaluation kits (EV kits) simplify the evaluation of the MAX9987/MAX9988 LO buffers/splitters. They are fully assembled and tested at the factory. Standard 50Ω SMA connectors are included on the EV kits for the input and all three outputs to allow quick and easy evaluation on the test bench. Evaluate: MAX9987/MAX9988 MAX9987/MAX9988 Evaluation Kits Quick Start The MAX9987/MAX9988 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. Test Equipment Required Table 1 lists the equipment required to verify the operation of the MAX9987/MAX9988 EV kits. It is intended as a guide only, and some substitutions are possible. Connections and Setup This section provides a step-by-step guide to testing the basic functionality of the EV kits. As a general precaution to prevent damaging the outputs by driving high-VSWR loads, do not turn on DC power or RF signal generators until all connections are made. 1) Calibrate the power meter at 900MHz for the MAX9987, or at 1800MHz for the MAX9988. Important: Use a power sensor rated to at least 0dBm. Measure the loss in the 20dB attenuator (pad) that will be connected to OUT1; account for this loss as an offset in the power meter. 2) Connect the 20dB pad to OUT1. The 20dB pad maintains a reasonable load VSWR for the output driver and protects the RF equipment from accidental overload. 3) Connect a 50Ω termination to OUT2. 4) For the MAX9987, set the RF signal generator for 900MHz CW (i.e., unmodulated) at +10dBm (accounts for 3dB loss of input pad); for the MAX9988, set the generator for 1800MHz at +12dBm. Connect generator to EV kit input through a 3dB pad. Disable the RF output until all connections are made. 5) Connect the power sensor to OUT1’s 20dB pad. 6) Set DC supply to +5.0V (set current limit around 250mA, if possible), and connect supplies to the EV kit through the ammeter. Testing the Buffers/Splitters 1) From the procedure above, the power meter should be reading a power of about +17dBm. 2) Ensure that the supply current is not more than 175mA at VCC = 5.25V and PIN = +10dBm. 3) Disable the RF generator, turn off the DC supply and swap the power detector/power pad to OUT2 (moving the 50Ω termination to OUT1), and recheck output power level and stability over supply, input power, and frequency, if desired. 4) Leaving the 20dB pad and 50Ω termination connected to OUT2 and OUT1, move the power detector to OUTPLL and verify an output level of around +3dBm. Table 1. List of Required Equipment EQUIPMENT QTY DESCRIPTION HP E3631A 1 Power supply Fluke 75 series II 1 Digital MultiMeter HP/Agilent 8648B 1 RF signal generator HP 437B 1 RF power meter HP 8482A 1 High-power sensor (power head) 20dB pad 1 20dB (1W) attenuators 50Ω termination 1 50Ω (1W) termination Layout Considerations A properly designed PC board is an essential part of any RF/microwave circuit. Keep RF signal lines as short as possible to reduce losses, radiation, and inductance. For best performance, route the ground pin traces directly to the exposed paddle underneath the package. This paddle should be connected to the ground plane of the board by using multiple vias under the device to provide the best RF/thermal conduction path. Solder the exposed paddle, on the bottom of the device package, to a PC board exposed pad. 7) Enable the RF signal generator’s output. 2 _______________________________________________________________________________________ MAX9987/MAX9988 Evaluation Kits Evaluate: MAX9987/MAX9988 POWER SUPPLY 3-OUT, HPIB (AG E3631A) + - + - 50Ω VCC OUTPLL OUT1 GND RF SIGNAL GENERATOR (HP 8648B) 3dB (1W) 50Ω MAX9987/MAX9988 EV KIT IN RF HIGHPOWER SENSOR OUT2 20dB (1W) RF POWER METER (GIGA 80701A, HP 437B) Figure 1. Test Setup Diagram _______________________________________________________________________________________ 3 C2 C1 C3 R3 100Ω C4 J3 SMA OUT 1 GND IN +5.0V VCCREF C6 C7 GND REF 2 GND OUT1 16 +5.0V 15 MAX9987 MAX9988 C5 J1 SMA IN 1 17 20 SMA OUTPLL GND C13 C14 J2 18 TP2 GND VCC1 C15 +5.0V +5.0V +5.0V 19 TP1 VCC OUTPLL Evaluate: MAX9987/MAX9988 MAX9987/MAX9988 Evaluation Kits 14 3 13 4 12 BIAS 11 5 VCC2 VCC2 C11 C12 GND VCC3 +5.0V VCC3 R4* 10 9 C9 OUT2 GND GND 8 7 BIASOUT BIASIN 6 C10 J4 R5* C8 R1* R2* *THESE RESISTORS ARE LEFT UNINSTALLED FROM FACTORY. REFER TO TABLE 1 IN THE MAX9987/MAX9988 DATA SHEET FOR INFORMATION ON SELECTING OPTIONAL VALUES TO SET OUTPUT POWER. Figure 2. MAX9987/MAX9988 EV Kit Schematic 4 _______________________________________________________________________________________ SMA OUT2 MAX9987/MAX9988 Evaluation Kits Evaluate: MAX9987/MAX9988 1.0" 1.0" Figure 3a. MAX9987 EV Kit PC Board Layout—Top Silkscreen Figure 3b. MAX9988 EV Kit PC Board Layout—Top Silkscreen 1.0" 1.0" Figure 4. MAX9987/MAX9988 EV Kit PC Board Layout—Top Soldermask Figure 5. MAX9987/MAX9988 EV Kit PC Board Layout—Top Layer _______________________________________________________________________________________ 5 Evaluate: MAX9987/MAX9988 MAX9987/MAX9988 Evaluation Kits 1.0" Figure 6. MAX9987/MAX9988 EV Kit PC Board Layout—Inner Layer 2 (Gnd) 1.0" Figure 8. MAX9987/MAX9988 EV Kit PC Board Layout—Bottom Layer 6 1.0" Figure 7. MAX9987/MAX9988 EV Kit PC Board Layout—Inner Layer 3 (Routes) 1.0" Figure 9. MAX9987/MAX9988 EV Kit PC Board Layout—Bottom Soldermask _______________________________________________________________________________________ MAX9987/MAX9988 Evaluation Kits Figure 10. MAX9987/MAX9988 EV Kit PC Board Layout— Bottom Silkscreen 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 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Evaluate: MAX9987/MAX9988 1.0"