19-2869; Rev 0; 5/03 MAX2396 Evaluation Kit 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 board. Component Suppliers Features ♦ EV Kit Is Fully Assembled and Tested ♦ Fully Monolithic Direct-Conversion Receiver Includes: Fully Integrated On-Chip RF VCO Eliminates: External IF SAW + IF AGC + I/Q Demodulator ♦ Meets All 3GPP Receiver’s Standard Requirements with at Least 3dB Margin on Eb/No ♦ Operates from a Single +2.7V to +3.3V Supply ♦ Over 90dB of Gain-Control Range ♦ Channel Selectivity Fully On-Chip, with Superior ACS (>39dB) Coilcraft 800-322-2645 www.coilcraft.com ♦ SPI™-/QSPI™-/MICROWIRE™-Compatible 3-Wire Serial Interface ♦ Receiver Current Consumption ≈ 31mA Digi-Key 800-344-4539 www.digikey.com ♦ On-Chip DC Offset Cancellation Johnson 507-833-8822 www.johnsoncomponents.com ♦ Small 28-Pin QFN Leadless Package Mini-Circuits 718-934-4500 www.minicircuits.com Murata 770-436-1300 www.murata.com Taiyo Yuden 800-322-2496 www.t-yuden.com SUPPLIER PHONE WEBSITE Note: When contacting these suppliers, please specify you are using the MAX2396. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Ordering Information TEMP RANGE PART* IC APPLICATION PACKAGE MAX2396EVKIT -40°C to +85°C 28 QFN IMT2000/UMTS *Contact factory for pricing and availability. Component List DESIGNATION QTY DESCRIPTION AGC, TCXO 2 10kΩ variable resistors (potentiometer) BG, CSB, I+, I-, LOCK, Q+, Q-, TAGC, TUNE 9 Digi-Key 5000K-ND C1, C7, C14, C16, C17, C24, C41, C50, C51, C55, C56, C57, C59, C60 DESIGNATION QTY DESCRIPTION C10–C13, C15, C23, C29, C30, C31 9 Not installed C26 1 1µF capacitor (0603) Taiyo Yuden JMK107BJ105MA-B 14 100pF capacitors (0402) Murata GRP1555C1H101J C39, C43, C46, C47 4 10µF tantalum capacitors (2012) (R code/case 0805-compatible) AVX TAJR106K006 C49 1 C2, C32 2 10nF capacitors (0402) Murata GRP155R71C103K 47nF capacitor (0402) Murata GRP155R71A473K 1 2 1000pF capacitors (0402) Murata GRP155R71H102K C52 C3, C22 4.7nF capacitor (0402) Murata GRP155R71H472K C4, C5 2 0Ω resistors (0402) C53 1 39pF capacitor (0402) Murata GRP1555C1H390J C6, C27, C28, C33–C38, C40, C42, C44, C45, C48, C54, C58 16 100nF capacitors (0402) Murata GRP155R61A104K C89 1 0.1µF capacitor (0805) Murata GRM21BR71E104K ________________________________________________________________ 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: MAX2396 General Description The MAX2396 evaluation kit (EV kit) simplifies the evaluation of the MAX2396 WCDMA direct-downconversion receive IC. It is fully assembled and tested at the factory. Standard 50Ω SMA and BNC connectors are included on the EV kit to allow quick and easy evaluation on the test bench. Evaluates: MAX2396 MAX2396 Evaluation Kit Component List (continued) DESIGNATION QTY 2 DESCRIPTION C90 1 1.0µF capacitor (1206) Murata GRM31MR71C105MA01L C101 1 0.01µF capacitor (0805) Murata GRM216R71H103K FL1 1 2140MHz saw filter (2140MHz) Murata SAFSD2G14FA0T00R00 GND, GND2, GND3, JU37, JU38, VCC_EXT, VCC_IC 7 — G_LNA, G_MXR, SHDNB 3 DESIGNATION QTY DESCRIPTION L5 1 1.3pF capacitor (0402) Murata GRP1555C1H1R3B LD LNA_IN, LNA_OUT, LO_TEST, MXR_IN, REF_IN 1 — 5 SMA end launch jack receptacles 0.031in Johnson Components 142-0701-881 R13, R14 2 2.0pF capacitors (0402) Murata GPR1555C1H2R0B R2, R10, R11, R16, R17 5 0Ω resistors (0402) Open R7, R22 2 Open resistors (0402) (not installed) R8 1 100Ω resistor (0402) R9, R18 2 10kΩ resistors (0402) R12, R15 2 50Ω resistors (0402) R19, R25 2 1kΩ resistors (0402) R23 1 330Ω resistor (0402) RBIAS 1 12kΩ ±1% resistor (0402) U1 1 MAX2396EGI WCDMA receiver U2 1 Open broadband RF balun (not installed) TDK HHM1537 U3, U4 2 MAX4444 low-distortion, differentialto-single-ended line drivers U5 1 Frac-N sigma delta synthesizer MAX2150EGI U9 1 MAX8867EUK28 linear regulator Y1 1 15.36MHz volt control TCXO (19.2MHz) Kinseki VC-TCXO-208C3-15.36 I, Q 2 BNC (50Ω) PC board receptacles (jacks) Amphenol 31-5239-52RFX J9 1 — JU20, JVCO, VCC_BB, VCC_CP, VCC_DIG, VCC_LNA, VCC_LOGIC, VCC_MXR, VCC_REF, VCC_TCXO, VCC_VCO 11 L1 1 3.3nH inductor (0402) Coilcraft 0402CS_3N3X L2 1 Open inductor (0402) (not installed) L4 1 1.8nH inductor (0402) TOKO LL1005-FH1N8S Open _______________________________________________________________________________________ MAX2396 Evaluation Kit The MAX2396 EV kit is fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. Test Equipment Required This section lists the recommended test equipment to verify the operation of the MAX2396 EV kit. It is intended as a guide only, and some substitutions are possible: • DC supply capable of delivering 200mA continuous current at +5.0V • DC supply capable of delivering 200mA continuous current at -5.0V • DC supply capable of delivering 50mA continuous current at +2.8V • DMM, to measure IC supply current • HP 8648C or equivalent signal source capable of generating -30dBm up to 2.2GHz • HP 8561E or equivalent RF spectrum analyzer (baseband spectrum only) • TDS3012 or equivalent digitizing oscilloscope • Windows® 95/98/2000 PC with an available parallel port Connections and Setup This section provides a step-by-step guide to testing the basic functionality of the EV kit: 1) Install the MAX2396 control software on a PC. This software uses a 3rd-party DLL to allow communication through the parallel port: “DriverLINX” by Scientific Software Tools (www.sstnet.com). The Maxim installer installs this DLL for you automatically. 2) Connect the interface board and cable from the PC parallel port to the EV kit header. Pin 1 on the ribbon cable is indicated with a stripe, and pin 1 on the header is nearest to the corner of the board. The interface board is just populated with logic buffers to protect the parallel port against accidental shorts, but be careful with these connections. 3) Calibrate the power meter, with the low-power head, at 2140MHz. A rough interpolation of the cal factor does not introduce noticeable error if reading the cal factor from a table. 4) Set the signal generator for a 2140.18MHz CW (unmodulated) output at -27dBm, and connect a 3dB pad to the DUT side of the SMA cable. Use the power meter to set the input power to the DUT at -30dBm. Use measured attenuators and/or the signal generator’s internal step attenuators (-40dB) to reduce the signal to -90dBm. 5) Connect the RF source’s SMA cable and attenuators to the EV kit’s LNAIN SMA input. 6) Connect the BNC cable from either I or Q to the spectrum analyzer. Connect the other output into the oscilloscope—be sure to set the oscilloscope’s inputs to 50Ω, and not 1MΩ. Cable loss at 180kHz is negligible; as long as cables are about the same length, no calibration is required at the output to observe proper signal level, as well as proper I/Q gain-and-phase balance. 7) Set one of the DC supplies to 2.8V and set a current limit of 100mA (if available). Connect this supply through the ammeter to VCC_IC, and readjust the supply, if necessary, to get 2.8V at the IC when powered up. This supply connection only powers the IC on the EV kit—read the ammeter to watch IC supply current for the receiver. Connect another line directly from the 2.8V supply to VCC_EXT to supply the external logic on the kit. Not having the voltage drop of the ammeter in line means the voltage is slightly higher than VCC_IC, but this does not cause a problem. 8) Set the other supplies for ±5.0V with a current limit of about 100mA. Connect these supplies to the +5V, GND, and -5V on the opposite side of the kit. These are the bipolar supplies for the MAX4444 differential line drivers that buffer the I/Q outputs. Note that all GND test points are connected to the same ground plane—it is only necessary to use one of them. 9) Set the spectrum analyzer to span from DC (minimum sweep) to 2MHz. Set the reference level to +10dBm. 10) Set the oscilloscope for a sweep rate of about 1µs/div, DC-coupling, with an amplitude scale of about 100mV/div. Windows is a registered trademark of Microsoft Corp. _______________________________________________________________________________________ 3 Evaluates: MAX2396 Quick Start Evaluates: MAX2396 MAX2396 Evaluation Kit Testing the WCDMA Receiver The power-up default state of the MAX2396 receiver is for: • LO midband (2140MHz) • LNA high gain • Mixer high gain, normal linearity • Powered on (out of shutdown) 1) Verify that the IC itself is drawing about 31mA (from VCC_IC). The two MAX4444 differential line drivers at the baseband outputs should draw about 80mA from each of their supplies. 2) Use the AGC adjust potentiometer on the board to set VAGC at +2.2V (maximum gain). 3) Spot-check the VCO tuning voltage (TUNE) to see that the synthesizer on the MAX2150 is locked. The voltage should be about midsupply with the RFLO running at its power-up default of 2140MHz. Disconnect any leads from this before continuing, as the noise pickup onto the tuning line directly frequency modulates the VCO, and degrades LO phase noise. 5) The on-board TCXO has a fine-tuning control—the other potentiometer on the EV kit allows for external temperature compensation of the TCXO to further decrease frequency error. Adjust the TCXO potentiometer if desired to bring the output tone exactly to 180kHz. 6) Observe the other output on the oscilloscope. At these input power levels, the SNR is typically much too low to see the output tone through the noise. If available, use the internal lowpass filter option (often 20MHz) and lots of averaging. 7) To make a gain/phase error measurement, connect both outputs to the scope. Increase the input power to about -50dBm, and back off the AGC until the outputs are swinging about 0.42VP-P. Again, use digital averaging to get both I and Q sinusoids visible on the scope. If automated measurements for phase and amplitude are not available, use the cursors to make the measurement. Calculate phase error in degrees, and gain error in dB, and verify that the results are better than 2 degrees and 0.6dB, respectively. 4) Observe the 180kHz tone on the spectrum analyzer. Adjust AGC to achieve a -3.5dBm output level. 4 _______________________________________________________________________________________ MAX2396 Evaluation Kit Evaluates: MAX2396 Figure 1a. MAX2396 EV Kit Schematic (Sheet 1 of 3) _______________________________________________________________________________________ 5 Evaluates: MAX2396 MAX2396 Evaluation Kit Figure 1b. MAX2396 EV Kit Schematic (Sheet 2 of 3) 6 _______________________________________________________________________________________ MAX2396 Evaluation Kit Evaluates: MAX2396 Figure 1c. MAX2396 EV Kit Schematic (Sheet 3 of 3) _______________________________________________________________________________________ 7 MAX2396 Evaluation Kit Evaluates: MAX2396 PC Board Artwork 1.0" Figure 2. MAX2396 EV Kit Component Placement Guide—Top Silkscreen 8 _______________________________________________________________________________________ MAX2396 Evaluation Kit Figure 3. MAX2396 EV Kit Metal Layer 2—Ground Plane _______________________________________________________________________________________ 9 Evaluates: MAX2396 PC Board Artwork (continued) MAX2396 Evaluation Kit Evaluates: MAX2396 PC Board Artwork (continued) Figure 4. MAX2396 EV Kit PC Board Layout Metal Layer 2—Ground Plane 10 ______________________________________________________________________________________ MAX2396 Evaluation Kit Figure 5. MAX2396 EV Kit PC Board Layout—Top Silkscreen ______________________________________________________________________________________ 11 Evaluates: MAX2396 PC Board Artwork (continued) MAX2396 Evaluation Kit Evaluates: MAX2396 PC Board Artwork (continued) Figure 6. MAX2396 EV Kit PC Board Layout—Top Silkscreen 12 ______________________________________________________________________________________ MAX2396 Evaluation Kit Figure 7. MAX2396 EV Kit PC Board Layout—Top Solder Mask 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 ____________________ 13 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Evaluates: MAX2396 PC Board Artwork (continued)