19-0773; Rev 0; 3/07 MAX2585 Evaluation Kit The MAX2585 evaluation kit (EV kit) simplifies evaluation of the MAX2585 RF-to-baseband receiver IC. The EV kit enables testing of the device’s RF performance and requires no additional support circuitry. The EV kit’s signal inputs and outputs use SMA and BNC connectors for easy connection to RF test equipment. Features ♦ Easy Evaluation of the MAX2585 ♦ On-Board +2.85V Regulators Allow Operation from +5V and -5V Supplies ♦ On-Board Op Amps Convert Differential I/Q Baseband Signals into Single-Ended Signals ♦ Jumpers for Supply Pins, Digital Power Control, and Shutdown ♦ All Critical Peripheral Components Included Ordering Information PART TEMP RANGE PINPACKAGE MAX2585EVKIT -40°C to +85°C 48 fcLGA-EP* PKG CODE L4877F-1 *EP = Exposed paddle. MAX2585 Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY C14, C24, C26, C29, C51, C61, C62, C63, C64, C98, C100, C101, C124 DESCRIPTION 13 100pF ±5% capacitors (0402) Murata GRM1555C1H101J C17, C94 2 1000pF ±10% capacitors (0402) Murata GRM155R71H102K C18, C90, C91 3 10µF ±10% capacitors (0805) Murata GRM21BR60J106K C22 1 470pF ±10% capacitor (0402) Murata GRM155R71H471K C1, C3, C6, C7, C8, C10, C15, C25, C27, C31, C34, C35, C36, C39, C43, C47, C48, C54, C55, C56, C58, C59, C60, C65–C68, C69, C71, C87, C88, C99, C114–C120 0 C2, C4 2 6800pF ±10% capacitors (0402) Murata GRM155R71E682K C28 1 0.047µF ±10% capacitor (0402) Murata GRM155R71C473K C5, C32 2 1.5pF ±0.1pF capacitors (0402) Murata GRM1555C1H1R5B C30, C79, C82 3 10µF ±10% capacitors (1206) Murata GRM31CR60J106K C9, C16 2 0.033µF ±10% capacitors (0402) Murata GRM155R71A333K C33, C95 2 1.0µF ±10% capacitors (0805) Murata GRM40X7R105K010 C11 1 6800pF ±5% capacitor (0805) Murata GRM2165C1H682J C37, C38, C40, C41, C42, C44, C45, C46 8 0.1µF ±10% capacitors (0402) Murata RM155R61A104K C12, C86, C123 3 0.01µF ±10% capacitors (0402) Murata GRM155R71C103K C49 1 22pF ±5% capacitor (0402) Murata GRM1555C1H220J C13 1 0.033µF ±10% capacitor (0603) Murata GRM188R71E333K C50 1 0.033µF ±5% capacitor (1206) Murata GRM3195C1H333J Not installed, capacitors ________________________________________________________________ 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 Evaluates: MAX2585 General Description MAX2585 Evaluation Kit Evaluates: MAX2585 Component List (continued) DESIGNATION QTY C72, C74, C76 3 0.1µF ±10% capacitors (0603) Murata GRM188R71C104K C73, C78 2 0.01µF ±10% capacitors (0805) Murata GRM21BR72A103K C75, C77, C80, C81 4 1.0µF ±10% capacitors (1206) Murata GRM319R71C105K C96, C97 2 22µF ±20% capacitors (0805) TDK C2012X5R0J226M FL1 0 Not installed FL3 1 220Ω surface-mount EMI filter (0603) Murata BLM18AG221SN1D FL4 FL5 J1, J6, J9–J15 J2, J3, J7, J8 J4, J5 J17 1 1 0 4 2 1 JU1, JU2, JU3, JU13, JU16, JU19, JU23, JU25, JU26, JU28, JU36, JU38 12 JU7, JU33, JU37, JU39 0 DESCRIPTION Cellular RX filter Fujitsu FAR-F5EA-881M50-D27B PCS RX filter Fujitsu FAR-F6EA-1G9600-D2AC Not installed, 0.062in SMA endlaunch jack receptacles Johnson 142-0701-801 0.062in SMA end-launch jack receptacles Johnson 142-0701-801 50Ω BNC PCB receptacles (jack) Amphenol 31-5329-52RFX 2 x 10 header dual in-line header (100 mil) Sullins PTC36SAAN 1 x 2 header, 2-pin in-line headers (100 mil) Sullins PTC36SAAN Not installed, in-line headers Sullins PTC36SAAN DESIGNATION QTY DESCRIPTION JU9, JU10, JU24, JU30 4 1 x 3 header, 3-pin in-line headers (100 mil) Sullins PTC36SAAN JU11, JU12, JU20, JU21, TP9, TP11, TP12 7 Test points Keystone S9000-ND L2, L5 2 43nH ±5% inductors (0603) Murata LQG15HN43NJ02 L3 1 2.2nH ±0.3nH inductor (0402) Murata LQG15HN2N2S00 L4, L8, L9 0 Not installed, inductors L10, L11 2 33nH ±5% inductors (0402) Murata LQG15HN33NJ00 R1, R6, R7, R20, R34–R37 8 1kΩ ±1% resistors (0402) R2, R9–R12, R30, R33, R38, R39 9 0Ω ±5% resistors (0402) R3 1 47kΩ ±5% resistor (0402) R4 1 3.01Ω ±1% resistor (0402) R5, R18, R19, R22–R29, R31, R32, R50, R57, R58, R59, R60, R61, R62 0 Not installed, resistors R8, R17 2 51Ω ±5% resistors (0402) R13 1 4.7kΩ ±5% resistor (0402) R14, R15 2 20kΩ ±1% resistors (0402) R16 1 10kΩ variable resistor Bournes 3296W-1-103 R21 1 22Ω ±5% resistor (0402) T1 1 Balun TOKO 617DB-1675 TP2, TP13–TP16 0 Not installed U1 1 MAX2585 CDMA receiver Maxim MAX2585ELM 11 Shunts (JU9, JU10, JU16, JU19, JU23, JU24, JU26, JU28, JU30, JU36, JU38) Sullins STC02SYAN — 2 _______________________________________________________________________________________ MAX2585 Evaluation Kit DESIGNATION QTY U2, U3 2 MAX4444 differential-to-singleended line receivers Maxim MAX4444ESE 0 Not installed 2088-2174MHz single-band RX VCO GPS and tri-mode ALPS Electric Co. UCVA4X211A U4 DESCRIPTION U5, U7 2 MAX8877 low-dropout linear regulators Maxim MAX8877EUK28 U6 1 19.2MHz voltage-controlled TCXO Kyocera KT5032N19200DCB28PLA 0 Not installed MAX4747 50Ω low-voltage quad SPST/dual SPDT analog switches in UCSP Maxim MAX4747EBE-T U10 Note: Components listed in bold are on backside of the board. Quick Start The MAX2585 EV kit is fully assembled and factory tested. Follow the instructions in the Connections and Setup section. Required Test Equipment This section lists the recommended test equipment to verify the operation of the MAX2585. It is intended as a guide only, and substitutions may be possible: • DC supply capable of delivering +5.0V and 250mA of continuous current • DC supply capable of delivering -5.0V and 250mA of continuous current • DC supply capable of delivering +2.5V at low current (< 1mA) for the gain control voltage (optional) • Signal source capable of operating up to 2.5GHz Connections and Setup This section provides step-by-step instructions for getting the EV kit up and running in cellular band CDMA mode: 1) Verify shunts JU1, JU2, JU3, JU9, JU10, JU16, JU19, JU23, JU24, JU26, JU28, JU30, JU36, and JU38 are in place. 2) Verify shunts JU9, JU10, and JU30 are in the ON (VCC) position. 3) The gain control pin voltage of the MAX2585 can be controlled by an on-board variable resistor or by an additional DC power supply. To use the variable resistor to adjust the gain control voltage, install a shunt across the two pins of JU24 closest to the edge of the board. Remove JU24 and connect a DC power supply to the VGC connector (TP8) on the board to use an external supply to adjust the gain control voltage. 4) Connect the INTF2300 interface cable to the EV kit’s 20-pin connector (J17). Note: Pin 1 of the interface cable corresponds to the red wire. Pin 1 of the connector is indicated on the printed circuit board (PCB) by a flattened corner in the J17 silkscreen outline. 5) With their outputs turned off, connect a +5.0V power supply to the header labeled +5V (JU11), and a -5.0V power supply to the header labeled -5V (JU20). Connect the power-supply ground to the header labeled GND (JU12 or JU21). 6) Install and run the MAX2585 control software (available from the factory). 7) With the MAX2585 control software active in the entry view screen, select the appropriate device type. 8) In the register-view screen of the control software, set the registers to typical cellular band CDMA settings as shown in Table 1. 9) Turn on the +5.0V and -5.0V power supplies. Then turn on the gain control power supply (optional). 10) Select the resend registers button at the top of the screen to send all registers to the MAX2585. • RF spectrum analyzer with a minimum 1kHz-to-3GHz frequency range 11) With its output turned off, connect a continuous wave RF signal source to CLNA_IN (J3). Set the RF frequency to 881.1MHz with a -104dBm power level. • IBM PC or compatible with Windows® 95/98/2000/ NT 4.0/XP, or later operating system and an available parallel port 12) In either the entry view or register view screen of the control software, toggle the DC cal pin box from 1 to 0, and then back to 1. • INTF2300 interface board (supplied with the EV kit) 13) Enable the output of the RF signal source. Windows is a registered trademark of Microsoft Corp. _______________________________________________________________________________________ 3 Evaluates: MAX2585 Component List (continued) Evaluates: MAX2585 MAX2585 Evaluation Kit PCB Construction 14) Connect Q_OUT (J5) or I_OUT (J4) to the spectrum analyzer. Set the spectrum analyzer to span from 1kHz to 640kHz. Set the resolution bandwidth to 3kHz and the reference level to 0dBm. 15) Observe the 100kHz output tone on the spectrum analyzer display. Adjust the VGC voltage to obtain an output power level of -28.5dBm. 16) To evaluate the MAX2585 in PCS CDMA mode, enter the typical PCS band CDMA register settings as shown in Table 1 and repeat the steps above with the signal source frequency set to 1960.1MHz and power level set to -104dBm. Connect the signal source to PLNA_IN (J2) for PCS band operation. The MAX2585 EV kit PCB uses a 10-mil-wide trace for 50Ω transmission line. The PCB has a 6-mil-layer profile on FR4 with a dielectric constant of 4.5. INTF2300 SPI Interface Board The INTF2300 interface board is used to interface 3-wire SPI™ protocol from a PC’s parallel port to the EV kit. This board translates 5V logic from the PC to VCC of the EV kit. The INTF2300 also provides buffering and EMI filtering. Its absolute maximum supply voltage is 4.6V, limited by the breakdown of the buffer IC. The recommended operating supply voltage range is +2.7V to +3.6V. The INTF2300 gets its power-supply voltage from the MAX2585 board if the shunt on the INTF2300 board is installed in the VCC position. Layout Considerations The MAX2585 EV kit can serve as a guide for board layout. Keep PC board trace lengths as short as possible to minimize parasitics. Also, keep decoupling capacitors as close to the IC as possible with a direct connection to the ground plane. SPI is a trademark of Motorola, Inc. Table 1. Register Conditions Table REGISTER SETTINGS MODE REG 8: BIAS REG 9: DCCAL REG A: NDIV REG B: PLLCONF REG C: OPCTRL REG D: RESERVED1 REG E: RESERVED2 REG F: TEST PCS Band CDMA 0AAAF 62000 09920 28160 16EDD 00304 55C00 13830 Cellular Band CDMA 0AAAF 62000 15824 A8320 16EDE 00304 55C00 13830 4 _______________________________________________________________________________________ MAX2585 Evaluation Kit Evaluates: MAX2585 Figure 1. MAX2585 EV Kit Schematic (Sheet 1 of 2) _______________________________________________________________________________________ 5 Evaluates: MAX2585 MAX2585 Evaluation Kit Figure 1. MAX2585 EV Kit Schematic (Sheet 2 of 2) 6 _______________________________________________________________________________________ MAX2585 Evaluation Kit 1 2 Evaluates: MAX2585 GND VCC JU1 DB25M 3 1 2 11 12 19 20 2 1 1 TO PC PARALLEL PORT 20 INTF2300 1 MAX2585EVKIT VCCOUT 20 12 11 20 19 GND Figure 2. INTF2300 Schematic _______________________________________________________________________________________ 7 Evaluates: MAX2585 MAX2585 Evaluation Kit Figure 3. MAX2585 EV Kit PCB Layout—Top Silkscreen 8 _______________________________________________________________________________________ MAX2585 Evaluation Kit Evaluates: MAX2585 Figure 4. MAX2585 EV Kit PCB Layout—Primary Component Side _______________________________________________________________________________________ 9 Evaluates: MAX2585 MAX2585 Evaluation Kit Figure 5. MAX2585 EV Kit PCB Layout—Inner Layer 2 10 ______________________________________________________________________________________ MAX2585 Evaluation Kit Evaluates: MAX2585 Figure 6. MAX2585 EV Kit PCB Layout—Inner Layer 3 ______________________________________________________________________________________ 11 Evaluates: MAX2585 MAX2585 Evaluation Kit Figure 7. MAX2585 EV Kit PCB Layout—Inner Layer 4 12 ______________________________________________________________________________________ MAX2585 Evaluation Kit Evaluates: MAX2585 Figure 8. MAX2585 EV Kit PCB Layout—Inner Layer 5 _______________________________________________________________________________________ 13 Evaluates: MAX2585 MAX2585 Evaluation Kit Figure 9. MAX2585 EV Kit PCB Layout—Secondary Component Side 14 ______________________________________________________________________________________ MAX2585 Evaluation Kit Evaluates: MAX2585 Figure 10. MAX2585 EV Kit PCB 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 ____________________ 15 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.