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| 19-2869; Rev 0; 5/03 MAX2396 Evaluation Kit 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 50 SMA and BNC connectors are included on the EV kit 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 board. Features o EV Kit Is Fully Assembled and Tested o Fully Monolithic Direct-Conversion Receiver Includes: Fully Integrated On-Chip RF VCO Eliminates: External IF SAW + IF AGC + I/Q Demodulator o Meets All 3GPP Receiver's Standard Requirements with at Least 3dB Margin on Eb/No o Operates from a Single +2.7V to +3.3V Supply o Over 90dB of Gain-Control Range o Channel Selectivity Fully On-Chip, with Superior ACS (>39dB) o SPITM-/QSPITM-/MICROWIRETM-Compatible 3-Wire Serial Interface o Receiver Current Consumption 31mA o On-Chip DC Offset Cancellation o Small 28-Pin QFN Leadless Package Evaluates: MAX2396 Component Suppliers SUPPLIER Coilcraft Digi-Key Johnson Mini-Circuits Murata Taiyo Yuden PHONE 800-322-2645 800-344-4539 507-833-8822 718-934-4500 770-436-1300 800-322-2496 WEBSITE www.coilcraft.com www.digikey.com www.johnsoncomponents.com www.minicircuits.com www.murata.com www.t-yuden.com Ordering Information PART* TEMP RANGE IC APPLICATION PACKAGE IMT2000/UMTS 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. MAX2396EVKIT -40C to +85C 28 QFN *Contact factory for pricing and availability. Component List DESIGNATION QTY AGC, TCXO BG, CSB, I+, I-, LOCK, Q+, Q-, TAGC, TUNE C1, C7, C14, C16, C17, C24, C41, C50, C51, C55, C56, C57, C59, C60 C2, C32 C3, C22 C4, C5 C6, C27, C28, C33-C38, C40, C42, C44, C45, C48, C54, C58 2 9 DESCRIPTION 10k variable resistors (potentiometer) Digi-Key 5000K-ND DESIGNATION QTY C10-C13, C15, C23, C29, C30, C31 C26 14 100pF capacitors (0402) Murata GRP1555C1H101J C39, C43, C46, C47 C49 C52 C53 C89 9 DESCRIPTION Not installed 1F capacitor (0603) Taiyo Yuden JMK107BJ105MA-B 10F tantalum capacitors (2012) (R code/case 0805-compatible) AVX TAJR106K006 47nF capacitor (0402) Murata GRP155R71A473K 4.7nF capacitor (0402) Murata GRP155R71H472K 39pF capacitor (0402) Murata GRP1555C1H390J 0.1F capacitor (0805) Murata GRM21BR71E104K 1 4 2 2 2 10nF capacitors (0402) Murata GRP155R71C103K 1000pF capacitors (0402) Murata GRP155R71H102K 0 resistors (0402) 100nF capacitors (0402) Murata GRP155R61A104K 1 1 1 1 16 ________________________________________________________________ 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. MAX2396 Evaluation Kit Evaluates: MAX2396 Component List (continued) DESIGNATION QTY C90 C101 FL1 GND, GND2, GND3, JU37, JU38, VCC_EXT, VCC_IC G_LNA, G_MXR, SHDNB 1 1 1 DESCRIPTION 1.0F capacitor (1206) Murata GRM31MR71C105MA01L 0.01F capacitor (0805) Murata GRM216R71H103K 2140MHz saw filter (2140MHz) Murata SAFSD2G14FA0T00R00 DESIGNATION QTY L5 LD LNA_IN, LNA_OUT, LO_TEST, MXR_IN, REF_IN R13, R14 R2, R10, R11, R16, R17 3 Open R7, R22 R8 2 1 BNC (50) PC board receptacles (jacks) Amphenol 31-5239-52RFX -- R9, R18 R12, R15 R19, R25 R23 RBIAS U1 U2 11 Open U3, U4 U5 1 1 1 3.3nH inductor (0402) Coilcraft 0402CS_3N3X Open inductor (0402) (not installed) 1.8nH inductor (0402) TOKO LL1005-FH1N8S U9 Y1 2 1 1 1 1 1 DESCRIPTION 1.3pF capacitor (0402) Murata GRP1555C1H1R3B -- SMA end launch jack receptacles 0.031in Johnson Components 142-0701-881 2.0pF capacitors (0402) Murata GPR1555C1H2R0B 0 resistors (0402) Open resistors (0402) (not installed) 100 resistor (0402) 10k resistors (0402) 50 resistors (0402) 1k resistors (0402) 330 resistor (0402) 12k 1% resistor (0402) MAX2396EGI WCDMA receiver Open broadband RF balun (not installed) TDK HHM1537 MAX4444 low-distortion, differentialto-single-ended line drivers Frac-N sigma delta synthesizer MAX2150EGI MAX8867EUK28 linear regulator 15.36MHz volt control TCXO (19.2MHz) Kinseki VC-TCXO-208C3-15.36 5 7 -- 2 5 2 1 2 2 2 1 1 1 1 I, Q J9 JU20, JVCO, VCC_BB, VCC_CP, VCC_DIG, VCC_LNA, VCC_LOGIC, VCC_MXR, VCC_REF, VCC_TCXO, VCC_VCO L1 L2 L4 2 _______________________________________________________________________________________ MAX2396 Evaluation Kit Quick Start The MAX2396 EV kit is fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. 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 50, and not 1M. 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 1s/div, DC-coupling, with an amplitude scale of about 100mV/div. Evaluates: MAX2396 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(R) 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. Windows is a registered trademark of Microsoft Corp. _______________________________________________________________________________________ 3 MAX2396 Evaluation Kit Evaluates: MAX2396 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. 4) Observe the 180kHz tone on the spectrum analyzer. Adjust AGC to achieve a -3.5dBm output level. 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 _______________________________________________________________________________________ MAX2396 Evaluation Kit Evaluates: MAX2396 Figure 1a. MAX2396 EV Kit Schematic (Sheet 1 of 3) _______________________________________________________________________________________ 5 MAX2396 Evaluation Kit Evaluates: MAX2396 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 PC Board Artwork (continued) Evaluates: MAX2396 Figure 3. MAX2396 EV Kit Metal Layer 2--Ground Plane _______________________________________________________________________________________ 9 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 PC Board Artwork (continued) Evaluates: MAX2396 Figure 5. MAX2396 EV Kit PC Board Layout--Top Silkscreen ______________________________________________________________________________________ 11 MAX2396 Evaluation Kit Evaluates: MAX2396 PC Board Artwork (continued) Figure 6. MAX2396 EV Kit PC Board Layout--Top Silkscreen 12 ______________________________________________________________________________________ MAX2396 Evaluation Kit PC Board Artwork (continued) Evaluates: MAX2396 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 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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