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19-4008; Rev 0; 2/06
MAX2335 Evaluation Kit
General Description
The MAX2335 evaluation kit (EV kit) simplifies evaluation of the MAX2335 450MHz, CDMA/OFDM LNA/mixer. This kit allows evaluation of the device's low-noise amplifier (LNA), downconverter, and buffer. Figure 1 shows the MAX2335 EV kit schematic. The EV kit provides 50 SMA connectors for all RF and IF input and output signals.
Features
Easy Evaluation of the MAX2335 +2.9V to +3.3V Single-Supply Operation All Critical Matching Components Included CDMA-Band RF Ports Matched to 450MHz SMA Connectors for All RF and IF Signal Ports Easy Configuration of Operating Modes
Evaluates: MAX2335
Ordering Information
PART TEMP RANGE IC PACKAGE 28 Thin QFN-EP* MAX2335EVKIT -40C to +85C *EP = Exposed paddle.
Component List
DESIGNATION C1, C9 C2, C22, C24, C27 C3-C6, C8, C10, C12, C14, C17, C21, C30, C31, C33 C7 C11, C18, C19, C20, C26, C28 C16 C23, C25 C29 J1-J5 JU1, JU3, JU4, JU5, JU7 JU1-JU8, JU10 JU2, JU6, JU8, JU10 L1 L3, L10, L11, L12 QTY 2 4 DESCRIPTION 0.01F 10% capacitors GRM155R71C103K 100pF 5% capacitors TDK C1005C0G1H101J DESIGNATION L5 L6 L7, L8 0 Open L9 1 6 1 2 1 5 5 9 4 1 4 3.9pF 5% capacitor EMK105SJ3R9JW-B 1000pF 10% capacitors TDK C1005X7R1H102K 6800pF capacitor TDK C1005X7R1E682K 6.8pF 5% capacitors EMK105RH6R8JW-B 22F 5% capacitor TAJC226K010 Open 1 x 3 headers Sullins PTC36SAAN Shunts Sullins STC02SYAN 1 x 2 headers Sullins PTC36SAAN 18nH 5% inductor (0402) TOKO LL1608-FH18NJ Open VCC, GND 2 L13 LNAOUT, IFOUT, LNAIN, LOIN MIXIN, LOOUT R1, R4, R5, R6, R8 R2, R9, R12, R13 R3 R7 R10 R11, R16, L2 R14 R15 T1 U1 1 1 4 2 5 4 1 1 1 3 1 1 1 1 QTY 1 1 2 DESCRIPTION 22nH 5% inductor (0402) TOKO LL1608-FH22NJ 47nH 5% inductor (0603) Coilcraft CS-47NXJBC 270nH 5% inductors (0805) TOKO LL2012-FHLR27J 1nH 5% inductor (0402) Coilcraft CS-1N0XJBW 47nH 2% inductor (0402) Coilcraft CS-47NXGBW SMA connectors Johnson 142-0701-801 SMA connectors Johnson 142-0701-201 1k 5% resistors (0402) Open 18.2k 1% resistor (0402) 1k 1% resistor (0402) 24.3k 1% resistor (0603) 0 5% resistors (0402) 20 1% resistor (0402) 475 1% resistor (0603) Balun transformer TOKO B5F 458DB-1011 MAX2335ETI 28-pin TQFN-EP Test points Digi-Key 5000K-ND
________________________________________________________________ Maxim Integrated Products
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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.
MAX2335 Evaluation Kit Evaluates: MAX2335
Component Suppliers
SUPPLIER AVX EF Johnson Kamaya Murata PHONE 803-946-0690 402-474-4800 219-489-1533 949-852-2001 FAX 803-626-2123 402-474-4858 219-489-2261 949-852-2002 WEBSITE www.avx-corp.com www.efjohnson.com www.kamaya.com www.murata.com www.toko.com
TOKO 708-297-0070 708-699-1194 Note: Indicate that you are using the MAX2335 when contacting these suppliers.
Recommended Test Equipment
* Power supply capable of providing 100mA at +2.9V to+3.3V * Two RF signal generators capable of delivering -70dBm to -10dBm of output power from 450MHz to 1200MHz (HP 8658C or equivalent) * Network analyzer covering the MAX2335 operating frequency range (HP 8753 or equivalent) * Spectrum analyzer covering the MAX2335 operating frequency range (HP 8561E or equivalent) * Ammeter (optional) for measuring supply current * Noise figure meter (optional) for measuring the noise figure of the LNA and downconverters (HP 8970B or equivalent)
4) Connect port 1 and port 2 of the network analyzer to LNAIN and LNAOUT, respectively, to measure the gain at 465MHz. 5) The network-analyzer display should indicate a typical gain of 16dB at 465MHz after accounting for board losses. The input and output board losses are 0.3dB at the 465MHz band. These losses are to be added to the measurements to obtain the performance of the LNA. Downconverter, High-Gain High-Linearity Mode 1) Turn off the DC supply. 2) Remove the network analyzer from the LNA input and output connections. The DC supply connections for testing the downconverter mixer are the same as the LNA section. 3) Set the LO/2 jumper (JU5) to VCC to enable the LO divider circuit. 4) The mode setting for testing the downconverter mixer is the same as the LNA section. 5) Connect an RF signal generator (with output disabled) to the LOIN connector. Set the frequency to 1150MHz and the output power to -7dBm. 6) Connect another RF signal generator (with output disabled) to the MIXIN SMA connector. Set the frequency to 465MHz and the output power to -40dBm. 7) Connect the spectrum analyzer to the IFOUT SMA connector. Set the spectrum-analyzer center frequency to 110MHz. 8) Turn on the DC supply. Enable the LO signal generator and RF input signal generator outputs. 9) Measure the peak of the 110MHz IF signal on the spectrum analyzer. Compensate the IF signal conversion gain of the balun and the board losses. The balun loss is approximately 0.3dB and the input and output board losses are 0.1dB each. 10) The conversation gain is approximately 13dB after corrections from step 9 are applied.
Quick Start
The MAX2335 EV kit is fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation.
Connections and Setup
This section provides a step-by-step guide to setting up the MAX2335 EV kit and testing the LNA and downconverters. Do not turn on the DC power or RF signal generators until all connections are made. Low-Noise Amplifier, High-Gain High-Linearity Mode 1) Set Mode 0 (JU1), Mode 1 (JU3), and Mode 2 (JU4) on the EV kit to VCC (high). This enables the LNA to operate in the high-gain and high-linearity mode. 2) Connect a DC supply preset to +3V (through an ammeter, if desired) to the EV kit's VCC and GND terminals. Do not turn on the supply. 3) Perform a full two-port calibration on a network analyzer at a -30dBm power level over a 400MHz to 500MHz frequency range.
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MAX2335 Evaluation Kit
Checking Noise Figure Noise figure measurements are sensitive to board and lab setup losses and parasitics. There are many techniques and precautions for measuring a low noise figure. Detailed explanation of these items goes beyond the scope of this document. For more information on how to perform this level of noise figure measurement, refer to the noise figure meter operating manual, as well as to the Hewlett Packard Application Note #57-2, Noise Figure Measurement Accuracy. PC Board Layout Considerations The MAX2335 EV kit can serve as a board layout guide. Keep PC board trace lengths as short as possible to minimize parasitics. Keep decoupling capacitors close to the device, with a low-inductance connection to the ground plane.
Evaluates: MAX2335
VCC JU10 R14 20 JU2 L1 18nH R15 475 VCC L2 0 C8 OPEN J5 OPEN C3 OPEN C4 OPEN
C1 0.01F
C2 100pF
L3 OPEN C6 OPEN
C5 OPEN L12 OPEN
LNAOUT R2 OPEN L9 1nH
C7 3.9pF
J4 OPEN
L6 47nH 28 27 26 VCC 25 N.C. 24 N.C. 23 I.C. 22 MIXIN 21 RBIAS IF_CDMA+ U1 20
C9 0.01F C10 OPEN
MIXIN LNAOUT N.C. 1 DEGEN 2 RLNA GND R3 18.2k C21 OPEN C23 6.8pF C24 100pF C25 6.8pF 3 2 1 L10 OPEN
J1 OPEN
C14 OPEN R16 0 C16 6800pF
R10 24.3k L5 22nH C17 OPEN
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IF_CDMA- 19 N.C. 18 BUFFEN 17 VCC 16
VCC JU6 R7 1k
L7 270nH L8 270nH VCC
4 6
IFOUT
LNAIN VCC VCC VCC JU3 JU4
4 LNAIN 5 MODE0 C11 1000pF 6 MODE1 C18 1000pF 7 MODE2 C19 N.C. 1000pF 8 R6 1k
MAX2335
R8 1k C26 1000pF C27 100pF C28 1000pF JU7 VCC C29 22F C31 OPEN VCC
T1 BALUN TOKO 85F 45808-1011
JU1 R4 1k R5 1k
R1 1k
GND
VCC
LO/2 9
LO_IN 10
N.C. 11
JU5
C20 1000pF LOIN
C22 100pF
VCC 15 I.C. LO_OUT N.C. L11 12 13 14 OPEN VCC JU8 R12 R13 OPEN OPEN L13 47nH LOOUT
R11 0 C33 OPEN
C30 C12 OPEN OPEN
J3 OPEN
R9 OPEN J2 OPEN
Figure 1. MAX2335 EV Kit Schematic
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MAX2335 Evaluation Kit Evaluates: MAX2335
Figure 2. MAX2335 EV Kit PC Board Layout--Front Side 4 _______________________________________________________________________________________
MAX2335 Evaluation Kit Evaluates: MAX2335
Figure 3. MAX2335 EV Kit PC Board Layout--Ground Layer 2
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MAX2335 Evaluation Kit Evaluates: MAX2335
Figure 4. MAX2335 EV Kit PC Board Layout--Ground Layer 3 6 _______________________________________________________________________________________
MAX2335 Evaluation Kit Evaluates: MAX2335
Figure 5. MAX2335 EV Kit PC Board Layout--Back Side
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MAX2335 Evaluation Kit Evaluates: MAX2335
Figure 6. MAX2335 EV Kit Component Placement Guide--Top Silk 8 _______________________________________________________________________________________
MAX2335 Evaluation Kit Evaluates: MAX2335
Figure 7. MAX2335 EV Kit Component Placement Guide--Bottom Silk
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 _____________________ 9 (c) 2006 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.

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