19-1507; Rev 1; 12/00 MAX2310/MAX2314 Evaluation Kits The MAX2310/MAX2314 evaluation kits (EV kits) simplify testing of the MAX2310/MAX2314 IF receivers. These kits allow evaluation of the devices’ variable-gain amplifier (VGA), I/Q demodulator, dual-band voltage-controlled oscillators (VCOs), synthesizer, 3-wire programming interface and power-management features. Figures 1 and 2 show MAX2310 and MAX2314 kit schematics, respectively. The EV kits provide 50Ω SMA connectors for all signal inputs and outputs. A varactor-based tank circuit is provided for the on-chip VCO and can be tuned by a potentiometer or an external voltage or phase locked with the on-chip phase-locked loop (PLL). PC board pads (J12, J13, J14, J15) are available for installing low-inductance oscilloscope probe points, if desired. Features ♦ 3-Wire Interface ♦ Differential Baseband Outputs ♦ +2.7V to +5.5V Single-Supply Operation ♦ SMA Connectors on All Signal Ports ♦ Low-Power Shutdown Mode ♦ PC Control Software (available at www.maxim-ic.com) Ordering Information PART TEMP. RANGE IC PACKAGE MAX2310EVKIT -40°C to +85°C 28 QSOP MAX2314EVKIT -40°C to +85°C 28 QSOP Note: To evaluate the MAX2312 or MAX2316, order the MAX2312EVKIT or MAX2316EVKIT. Component List DESIGNATION QTY C1, C33, C34 3 C2 DESCRIPTION DESIGNATION QTY DESCRIPTION 47pF ±10%, 25V min ceramic capacitors (0402) C27 1 10µF ±10%, 16V min tantalum cap AVX TAJC106K016 1 5pF ±0.1pF, 25V min ceramic capacitor (0402) C29 1 0.033µF ±10%, 25V min ceramic capacitor (0402) C3, C4 2 18pF ±10%, 25V min ceramic capacitors (0402) C30 1 3300pF ±10%, 25V min ceramic capacitor (0402) C5 1 1.5pF ±0.1pF, 25V min ceramic capacitor (0402) (MAX2310) D1 1 Open 1 2 12pF ±10%, 25V min ceramic capacitors (0402) (MAX2310) D3 C6, C7 Varactor diode Alpha SMV1255-003 C8, C12, C23, C24, C25 330pF ±10%, 25V min ceramic capacitors (0402) D4 1 5 Varactor diode (MAX2310) Alpha SMV1255-003 INTF2300 Interface Board 1 3-wire programming and interface board L1 1 68nH inductor Coilcraft 0805CS-680 XJBC L2 1 18nH inductor (MAX2310) Coilcraft 0805CS-220 XJBC L3 1 1µH inductor Coilcraft 1008CS-102 XKBC C9, C10, C11, C13, C14, C15, C18, C21, C22, C28, C35, C37, C38, C42, C46 15 C16, C26, C31, C32, C36, C39, C40, C41, C45 9 Open C17 1 10pF ±10%, 25V min ceramic capacitor (0402) 2 8pF ±10%, 25V min ceramic capacitors (0402) C19, C20 0.01µF ±10%, 25V min ceramic capacitors (0402) L4 1 L5 1 180nH inductor Coilcraft 0805CS-181TKBC (MAX2310) 680nH inductor Coilcraft 0805CS-681TKBC (MAX2314) 270nH inductor Coilcraft 0805CS-271 XKBC ________________________________________________________________ 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: MAX2310/MAX2314 General Description Evaluate: MAX2310/MAX2314 MAX2310/MAX2314 Evaluation Kits Component List (continued) DESIGNATION QTY Q1 1 Open DESCRIPTION R1, R10, R12, R31–R34 6 0Ω resistors (0402) R11 1 0Ω resistors (0402) (MAX2310) R4, R5 2 10kΩ ±5% (0402) (MAX2310) R2, R3, R23 3 10kΩ ±5% resistors (0402) C43 1 1000pF ±10% (0402) (MAX2314) R6 EQUIPMENT DESCRIPTION RF Signal Generators (2) HP 8648A or equivalent. Capable of delivering -70dBm to -10dBm of output power in the 10MHz to 500MHz frequency range. One generator is required to test the receive signal path and the other is for the reference frequency. 1 100Ω ±5% resistor (0402) (MAX2310) Oscilloscope For viewing the demodulator outputs, 3-wire serial interface, and other functions R8, R14, R16, R18 4 100Ω ±5% resistors (0402) Power Supply Capable of providing at least 100mA at +2.7V to +5.5V R7 1 49.9Ω ±1% resistor (0402) R9 1 680Ω ±1% resistor (0402) Additional Voltage Source For external control of VGA functions (optional) R13, R24 2 10kΩ Bourns variable resistors Digi-Key 3296W-104-ND Personal Computer 486DX33 or better, with Windows95® or Windows98® operating system and a functional parallel port. R15, R17, R19, R20, R21, R25, R27–R30, R35 11 Open INTF2300 Interface Board Provided with EV kit R22, R26 2 47kΩ ±5% resistors (0402) T1 1 Balun transformer Toko DB458-1011 U1 1 Maxim MAX2310EEI or MAX2314EEI IC None 1 MAX2310/MAX2314 circuit board None 1 MAX2310/MAX2312/MAX2314/ MAX2316 data sheet None 1 20-pin ribbon cable SUPPLIER Windows95 and Windows98 are registered trademarks of Microsoft Corp. Recommended Test Equipment The test equipment recommended to verify MAX2310/ MAX2314 operation is listed in Table 1. This list is intended as a guide only; substitutions may be possible. Connections and Setup The following sections provide instructions for getting the EV kit running in both the CDMA and FM modes. Component Suppliers PHONE FAX Alpha Industries 617-935-5150 617-933-2359 AVX 803-946-0690 803-626-3123 Coilcraft 847-639-6400 847-639-1469 Digi-Key 218-681-6674 218-681-3380 Murata 949-852-2001 949-852-2002 Toko 708-297-0070 708-699-1194 Quick Start The MAX2310/MAX2314 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section. 2 Table 1. Recommended Equipment CDMA Mode Perform the following steps to evaluate the MAX2310/ MAX2314 in CDMA mode: 1) Verify that shunts JU3, JU10, and JU11 are in place. 2) Connect the INTF2300 interface cable as shown in Figure 8. (Pin 1 of the interface cable corresponds to the red wire; pin 1 is designated in silk screen on each of the PC boards.) 3) Connect a +2.75V power supply to the VCC and GND terminals. 4) Install and run Maxim’s CDMA control software (available at www.maxim-ic.com). Click on the Maxim CDMA software on the Windows task bar. On the IC selection form, click on the MAX2310/ MAX2314 control button. _______________________________________________________________________________________ MAX2310/MAX2314 Evaluation Kits VOUTp−p Gain = 20log 2 2 VIN PIN(dBm) 10 VIN (RMS) = 1/2 × 10 Gain = approximately 60dB Note: The balun loss is not taken into account. This loss is typically less than 0.5dB. FM Mode Perform the following steps to change to FM mode: 1) With the MAX2310/MAX2314 control screen active, bring the MODE pin low by clicking on the "L" control button located near the middle of the screen (MAX2310). Set the IN_SEL bit to "0." Click on the “send data” button (MAX2314). 2) Connect a signal generator with 85.48MHz at -66dBm and apply it to the FM port. 3) Configure an oscilloscope to measure a highimpedance (10kΩ), 1Vp-p, 100kHz, differential waveform. Connect it to the I or Q output. Adjustments and Control VGC Adjust The MAX2310/MAX2314 EV kits are configured with a 10kΩ trim pot for setting and adjusting the VGA gain. An external supply can be used by removing the 2-pin shunt (JU3) and by directly connecting the supply to JU2. The VGC voltage must be clean to minimize undesired amplitude modulation. Interface Control The interface port is designed to use a 20-pin ribbon cable. Ten pins are signal lines, and the other 10 pins are digital grounds. Pin 1 of the interface cable is red. Pin 1 is also designated in silk screen on each of the PC boards. Detailed Description The following sections cover the EV kits’ circuit blocks in detail. (Refer to the MAX2310/MAX2312/MAX2314/ MAX2316 data sheet for additional information.) CDMA Inputs The CDMA+ and CDMA- pins are differential inputs to the VGAs of the MAX2310/MAX2314. The EV kit is configured for single-ended (50Ω) operation at the CDMA differential input connector. The on-board balun converts this input to a differential signal for the MAX2310/MAX2314. The impedance is set by the combination of L4, R9, C19, C20, and the 4:1 impedance ratio of the input balun. FM Inputs The FM+ and FM- pins are differential inputs to the VGAs of the MAX2310/MAX2314. The EV kit is configured for single-ended (50Ω) operation at the FM connector. The matching network transforms 50Ω to 850Ω. REF Inputs The REF port is AC-coupled and terminated for use with a 50Ω signal source. I/Q Outputs The I/Q outputs are self-biased baseband outputs. PC Board Layout/Construction The MAX2310/MAX2314 EV kits can serve as board layout guides. Keep PC board trace lengths as short as possible to minimize parasitics. Keep decoupling capacitors close to the device, with a low-inductance via connection to the ground plane. The MAX2310/MAX2314 EV kits’ PC boards use 14milwide traces for 50Ω traces. The PC board has an 8millayer profile on FR4, with a 4.5 dielectric and 75mil trace-to-ground-plane spacing. _______________________________________________________________________________________ 3 Evaluate: MAX2310/MAX2314 5) With the MAX2310/MAX2314 control screen active, bring the SHDN pin high by clicking on the "H" control button located near the middle of the screen. 6) (MAX2310 only) With the MAX2310/MAX2314 control screen active, bring the MODE pin high by clicking on the "H" control button located near the middle of the screen. The mode pin is floated on the MAX2314 board. In the control register set the DIV_SEL bit and the VCO_SEL bit to “0.” Click on the “send data” button. 7) Connect a function generator to the REF port, configured for a sine wave with a 19.68MHz frequency and a -10dBm amplitude. (The REF port is 50Ω terminated.) 8) Connect a signal generator with 210.48MHz (MAX2310) or 85.48MHz (MAX2314) at -66dBm and apply it to the CDMA differential port. 9) Set VGC to 2.5VDC by rotating potentiometer R13. Optionally, an external VGC voltage may be used by removing jumper JU3 and applying a DC voltage to JU2. 10) Configure an oscilloscope to measure a highimpedance (10kΩ), 1Vp-p, 100kHz differential waveform. Connect it to the I or Q output. Voltage gain can be calculated by: 4 REF IOUT- IOUT+ R11 0Ω R10 0Ω JU1 C36 OPEN R23 10kΩ R24 10kΩ J2 J1 J3 R5 10kΩ R4 10kΩ R3 10kΩ R2 10kΩ D4 D3 C29 R1 0Ω 0.033µF VCC R32 0Ω R31 0Ω R7 49.9Ω C7 12pF C4 18pF C3 18pF C2 5pF SHDN C11 0.01µF C9 0.01µF C10 0.01µF VCCD MODE C5 1.5pF C6 12pF C30 3300pF VCCA L2 18nH MODE REF 14 IOUT- 13 IOUT+ 12 SHDN 11 9 V CC 10 GND 8 7 TANK_H- 6 TANK_H+ 5 TANK_L- 4 TANK_L+ 2 CP_OUT 3 GND BYP 1 DR Figure 1. MAX2310EV Kit Schematic _______________________________________________________________________________________ VCC 15 LOCK R22 47kΩ MAX2310 BYP 18 19 20 21 22 23 R9 680Ω 24 25 QOUT- LOCK 16 QOUT+ 17 CLK EN DATA VCC VGC CDMA- CDMA+ FM+ FM- C14 C15 C13 0.01µF 0.01µF 0.01µF 28 27 26 L1 68nH C46 0.01µF C1 47pF VCCA CLK EN DATA VCCA C35 0.01µF C22 0.01µF R12 0Ω L4 180nH C17 10pF L3 1µH C20 8pF 8pF C19 R33 0Ω J8 J7 J4 JU3 T1 QOUT- QOUT+ JU2 TOKO DB458-1011 C18 0.01µF C21 0.01µF R34 0Ω L5 270nH J5 FM VGC VCC R13 10kΩ CDMA DIFF Evaluate: MAX2310/MAX2314 MAX2310/MAX2314 Evaluation Kits _______________________________________________________________________________________ GND VCC DATA SHDN MODE C23 330pF VCC EN C12 330pF C8 330pF C27 10µF C24 330pF L6 270nH VCC R8 100Ω C28 0.01µF CLK C42 0.01µF C25 330pF 100Ω R16 LOCK ICCD JU11 ICCA JU10 100Ω R14 C38 0.01µF C37 0.01µF 100Ω R18 VCC C34 47pF C33 47pF 9 OPEN 1 VCCD VCCA 2 LOCK 3 CLK 4 EN 5 DATA 6 FILTERED VCC 7 SHDN 8 MODE 10 OPEN Evaluate: MAX2310/MAX2314 R6 100Ω MAX2310/MAX2314 Evaluation Kits Figure 1. MAX2310EV Kit Schematic (continued) 5 6 REF IOUT- IOUT+ R10 0Ω J2 J1 J3 R3 10kΩ R32 0Ω C11 0.01µF C9 0.01µF VCCA REF GND VCC BYP N.C. 14 IOUT- 13 IOUT+ 12 SHDN 11 10 9 8 7 6 N.C. 5 TANK_L- 4 TANK_L+ 3 GND 2 CP_OUT BYP 1 DR Figure 2. MAX2314EV Kit Schematic _______________________________________________________________________________________ VCC 15 LOCK R22 47kΩ MAX2314 BYP 18 19 20 22 23 R9 680Ω 24 25 QOUT- LOCK 16 QOUT+ 17 CLK EN DATA VCC VGC CDMA- CDMA+ FM+ FM- C14 C15 C13 0.01µF 0.01µF 0.01µF 28 27 26 L1 68nH C46 0.01µF C10 0.01µF VCCD C2 5pF SHDN C4 18pF C3 18pF C30 3300pF R31 0Ω R7 49.9Ω C43 1000pF Alpha SMV 1255-003 D4 C29 0.033µF R2 10kΩ R1 0Ω R23 10kΩ C1 47pF VCCA CLK EN DATA VCCA C35 0.01µF C22 0.01µF R12 0Ω L4 680nH C17 10pF L3 1µH R33 0Ω R34 0Ω J8 J7 J4 JU3 QOUT- QOUT+ JU2 TOKO DB458-1011 C18 0.01µF C21 0.01µF C20 15pF C19 15pF L5 270nH FM J5 VGC VCC R13 10kΩ CDMA DIFF Evaluate: MAX2310/MAX2314 MAX2310/MAX2314 Evaluation Kits _______________________________________________________________________________________ GND VCC DATA SHDN C23 330pF VCC EN C12 330pF C27 10µF C24 330pF L6 270nH VCC C28 0.01µF CLK C42 0.01µF C25 330pF 100Ω R16 LOCK ICCD JU11 ICCA JU10 100Ω R14 C38 0.01µF C37 0.01µF 100Ω R18 VCC C34 47pF C33 47pF 9 OPEN 1 VCCD VCCA 2 LOCK 3 CLK 4 EN 5 DATA 6 FILTERED VCC 7 SHDN 8 10 OPEN Evaluate: MAX2310/MAX2314 R8 100Ω MAX2310/MAX2314 Evaluation Kits Figure 2. MAX2314EV Kit Schematic (continued) 7 Evaluate: MAX2310/MAX2314 MAX2310/MAX2314 Evaluation Kits 1.0" 1.0" Figure 3. MAX2310/MAX2314 EV Kit Component Side— Layer 1 Figure 4. MAX2310/MAX2314 EV Kit Ground Plane—Layer 2 1.0" Figure 5. MAX2310/MAX2314 EV Kit Inner Layer—Layer 3 8 _______________________________________________________________________________________ MAX2310/MAX2314 Evaluation Kits Evaluate: MAX2310/MAX2314 1.0" 1.0" Figure 6. MAX2310/MAX2314 EV Kit Solder Side— Layer 4 Figure 7. MAX2310/MAX2314 EV Kit Silk Screen _______________________________________________________________________________________ 9 Evaluate: MAX2310/MAX2314 MAX2310/MAX2314 Evaluation Kits INTF2300 Interface Board The INTF2300 interface board is used to control the 3wire interface of a device under test from the parallel port of a PC. This board level translates 5V logic from the PC to VCC of the device under test. The INTF2300 GND also provides buffering and EMI filtering. The recommended operating supply voltage range is +2.7V to +3.6V. For operation of the MAX2310/MAX2314 above +3.6V, jumper JU1 may be removed and an external supply voltage of +3.6V may be applied between VCC (pin 2) and GND (pin 1) (Figure 8). VCC JU1 1 2 3 DB25M 1 1 TO PC PARALLEL PORT 20 6 10 INTF2300 10 DUT MAX2310 MAX2314 VCCD 6 20 1 1 Figure 8. INTF2300 Interface Board 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.