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| 19-2703; Rev 0; 11/02 MAX9989/MAX9990 Evaluation Kits General Description The MAX9989/MAX9990 evaluation kits (EV kits) simplify the evaluation of the MAX9989/MAX9990 LO buffers. They are fully assembled and tested at the factory. Standard 50 SMA connectors are included for the input and both outputs to allow quick and easy evaluation on the test bench. This document provides a list of equipment required to evaluate the device, a straightforward test procedure to verify functionality, a circuit schematic, a bill of materials (BOM), and artwork for each layer of the PC boards. Contact MaximDirect sales at 888-629-4642 to check on pricing and availability for these kits. o Fully Assembled and Tested EV Kits o +14dBm to +20dBm Adjustable Output Power o 1dB Output Power Variation o Isolated PLL Output (+3dBm) o Low Output Noise: -170dBc/Hz at +17dBm o 40dB Reverse Isolation o Better than 35dB Main Driver Output to PLL Amp Output Isolation o 110mA Supply Current at +17dBm o ESD Protection Features Evaluate: MAX9989/MAX9990 Component Suppliers SUPPLIER Johnson Murata PHONE 507-833-8822 770-436-1300 WEBSITE www.johnsoncomponents.com www.murata.com MAX9989EVKIT MAX9990EVKIT PART Ordering Information TEMP RANGE -40C to +85C -40C to +85C IC PACKAGE FREQUENCY RANGE (MHz) 700 to 1100 1500 to 2200 20 Thin QFN-EP* 20 Thin QFN-EP* Component List (MAX9989) DESIGNATION C1, C2, C4, C6, C8, C9, C10 QTY 7 DESCRIPTION 47pF 5%, 50V C0G-type ceramic capacitors (0603) Murata GRM1885C1H470J 0.1F 10%, 16V X7R-type ceramic capacitors (0603) Murata GRM188R71C104K 5pF 0.25pF, 50V C0G-type ceramic capacitor (0603) Murata GRM1885C1H5R0C PC board edge-mount SMA RF connectors (flat-tab launch) Johnson 142-0741-856 100 5% resistor (0603) Not installed Large test point for 0.062in PC board (red) Mouser 151-107 or equivalent Large test point for 0.062in PC board (black) Mouser 151-103 or equivalent MAX9989ETP-T *EP = Exposed paddle. Component List (MAX9990) DESIGNATION C1, C2, C4, C5, C6, C8, C9, C10 QTY 8 DESCRIPTION 22pF 5%, 50V C0G-type ceramic capacitors (0603) Murata GRM1885C1H220J 0.1F 10%, 16V X7R-type ceramic capacitors (0603) Murata GRM188R71C104K PC board edge-mount SMA RF connectors (flat-tab launch) Johnson 142-0741-856 100 5% resistor (0603) Not installed Large test point for 0.062in PC board (red) Mouser 151-107 or equivalent Large test point for 0.062in PC board (black) Mouser 151-103 or equivalent MAX9990ETP-T C3, C7, C11 3 C5 1 C3, C7, C11 3 J1, J2, J3 R1 R2-R5 TP1 3 1 4 1 J1, J2, J3 R1 R2-R5 TP1 3 1 4 1 TP2 U1 1 1 TP2 U1 1 1 ________________________________________________________________ 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. MAX9989/MAX9990 Evaluation Kits Evaluate: MAX9989/MAX9990 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. Testing the Buffer 1) From the procedure above, the power meter should be reading a power of about +17dBm. Keep in mind that because of a 2nd harmonic component in the output, these measured results are slightly higher than the true on-frequency RF power. 2) Ensure that the supply current is not more than 122mA at VCC = 5.25V and PIN = +10dBm. 3) Leaving the 20dB power pad connected to OUTLO, move the power detector to OUTPLL (removing the 50 termination) and verify an output level of about +3dBm. Be sure to turn off the 20dB offset. 4) After testing, disable the RF generator, disconnect the supply, then disconnect the RF cables. Test Equipment Required Table 1 lists the equipment required to verify the operation of the MAX9989/MAX9990 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 the RF signal generator until all connections are made: 1) Calibrate the power meter at 900MHz for the MAX9989, or at 1800MHz for the MAX9990. Be sure to use a power sensor rated to at least 20dBm. Measure the loss of the 20dB attenuator (pad) that is connected to OUTLO; account for this loss as an offset in the power meter. 2) Connect a 20dB pad to the LO driver output (OUTLO). The 20dB pad maintains a reasonable load VSWR for the output drivers and protects the RF equipment from accidental overload. 3) Connect a 50 termination to OUTPLL. 4) For the MAX9989, set the RF signal generator for 900MHz CW (i.e., unmodulated) at +10dBm (accounts for 3dB loss of input pad); for the MAX9990, set the generator for 1800MHz at +12dBm. Connect the generator to the EV kit input through a 3dB pad. Disable the RF output until all connections are made. 5) Connect the power sensor to OUTLO's 20dB pad. 6) Set the DC supply to +5.0V (set the current limit to around 250mA, if possible). Disable the output voltage and connect the supply to the EV kit through the ammeter. 7) Enable the supply. 8) Enable the RF signal generator's output. 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. Table 1. List of Required Equipment EQUIPMENT HP E3631A Fluke 75 series II HP/Agilent 8648B HP 437B HP 8482A 20dB pad 3dB pad 50 termination QTY 1 1 1 1 1 1 1 1 DESCRIPTION DC power supply Digital multimeter RF signal generator RF power meter High-power sensor (power head) 20dB (1W) attenuator 3dB attenuator 50 (1W) termination 2 _______________________________________________________________________________________ MAX9989/MAX9990 Evaluation Kits Evaluate: MAX9989/MAX9990 BENCH MULTIMETER HPIB (HP 34401A) POWER SUPPLY 3-OUT, HPIB (AG E3631A) (AMMETER) + - + - 50 +5V GND OUTPLL RF SIGNAL GENERATOR (HP 8648B) MAX9989/MAX9990 EV KIT IN 3dB OUTLO 20dB (1W) RF HIGHPOWER SENSOR RF POWER METER (GIGA 80701A, HP 437B) Figure 1. Test Setup Diagram _______________________________________________________________________________________ 3 MAX9989/MAX9990 Evaluation Kits Evaluate: MAX9989/MAX9990 5.0V TP1** +5V C11 TP2 GND SMA OUTPLL 5.0V 5.0V C10 C7 C8 R1 100 OUTPLL C9 VCC1 GND GND GND 16 GND 15 20 GND C1 19 18 17 1 SMA IN 5.0V C3 IN 2 MAX9989 MAX9990 14 GND VCCREF C2 GND 3 13 GND VCC2 4 BIAS 5 11 12 VCC2 C5 6 BIASIN 7 BIASOUT 8 GND 9 GND 10 OUTLO C4 C6 5.0V REF SMA OUTLO R4* R5* R2* R3* *THESE RESISTORS ARE LEFT UNINSTALLED FROM FACTORY. REFER TO TABLE 1 IN THE MAX9989/MAX9990 DATA SHEET FOR INFORMATION ON SELECTING OPTIONAL VALUES TO SET OUTPUT POWER. **SINCE +5V MUST BE APPLIED AT THE SAME TIME FOR ALL VCC PINS, ALL VCC PINS ARE ROUTED TO ONE COMMON PORT. Figure 2. MAX9989/MAX9990 EV Kit Schematic 4 _______________________________________________________________________________________ MAX9989/MAX9990 Evaluation Kits Evaluate: MAX9989/MAX9990 1.0" Figure 3a. MAX9989 EV Kit Component Placement Guide-- Top Silkscreen 1.0" Figure 3b. MAX9990 EV Kit Component Placement Guide-- Top Silkscreen 1.0" Figure 4. MAX9989/MAX9990 EV Kit PC Board Layout--Top Soldermask 1.0" Figure 5. MAX9989/MAX9990 EV Kit PC Board Layout--Top Layer Metal 5 _______________________________________________________________________________________ MAX9989/MAX9990 Evaluation Kits Evaluate: MAX9989/MAX9990 1.0" Figure 6. MAX9989/MAX9990 EV Kit PC Board Layout--Inner Layer 2 (GND) 1.0" Figure 7. MAX9989/MAX9990 EV Kit PC Board Layout--Inner Layer 3 (Routes) 1.0" Figure 8. MAX9989/MAX9990 EV Kit PC Board Layout--Bottom Layer Metal 6 1.0" Figure 9. MAX9989/MAX9990 EV Kit PC Board Layout--Bottom Soldermask _______________________________________________________________________________________ MAX9989/MAX9990 Evaluation Kit Evaluate: MAX9989/MAX9990 1.0" Figure 10. MAX9989/MAX9990 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 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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