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19-1807; Rev 1; 4/03
MAX2338 Evaluation Kit
General Description
The MAX2338 evaluation kit (EV kit) simplifies evaluation of the MAX2338 dual-band, triple-mode LNA and mixers. This kit allows evaluation of the device's low noise amplifiers (LNA), downconverters and buffers. Figure 1 shows the MAX2338 EV kit schematic. The EV kit provides 50 SMA connectors for all RF and IF input and output signals. o Easy Evaluation of the MAX2338 o +2.7V to +3.3V Single Supply Operation o All Critical Matching Components Included o Cellular-Band RF Ports Matched to 880MHz o PCS-Band RF Ports Matched to 1960MHz o SMA Connectors for all RF and IF Signal Ports o Easy Configuration of Operating Modes
Features
Evaluates: MAX2338
Component Suppliers
SUPPLIER AVX EFJohnson Kamaya Murata Toko PHONE 803-946-0690 402-474-4800 219-489-1533 949-852-2001 708-297-0070 FAX 803-626-3123 402-474-4858 219-489-2261 949-852-2002 708-699-1194 WEB avx-corp.com efjohnson.com kamaya.com murata.com toko.com
Ordering Information
PART MAX2338EVKIT TEMP RANGE -40C to +85C IC PACKAGE 28 QFN
Note: When contacting these suppliers, please specify that you are using the MAX2338.
DESIGNATION C1, C4, C9 QTY 3 DESCRIPTION 0.1F 10% ceramic capacitors (0402) Murata GRM39X7R103K016A 100pF 5% ceramic capacitors (0402) Murata GRM36COG101J050A 6800pF 10% ceramic capacitors (0402) Murata GRM36X7R682025A Not Installed 2.7pF 0.1pF ceramic capacitor (0402) Murata GRM36COG2R7B050A 0.75pF 0.1pF ceramic capacitor (0402) Murata GRM36COGR75B050A 7pF 0.1pF ceramic capacitor (0402) Murata GRM36COG070B050A 1000pF 10% ceramic capacitors (0402) Murata GRM36X7R102050A 0 resistor (0402) DESIGNATION C22 QTY 1
Component List
DESCRIPTION 22pF 5% ceramic capacitor (0402) Murata GRM36COG220J050A 4.0pF 0.1pF ceramic capacitors (0402) Murata GRM36COG040B050A 22F, 10V min tantalum capacitor AVX TAJC226K010 15pF 5% ceramic capacitor (0603) Murata GRM39COG150J050A 4.7pF 0.1pF ceramic capacitors (0402) Murata GRM36COG4R7B050 1k 5% resistors (0402) 24.3 1% resistors (0402) 3.3k 1% resistor (0402) 0 resistors (0402) 8.25k 5% resistor (0402) Not installed 20 1% resistor (0402) 8.2nH inductor Toko LL1608-FS8N2J
C2, C3, C24, C27
6
C23, C25
2
C5, C14, C16 C6, C13, C15, C17, C21 C7
3
C29
1
3
C30
1
1
C31 R1, R4, R5, R6, R8 R2, R3 R7 R9, R10 R11 R12, R13 R14 L1
1
C8
1
5 2 1 2 1 2 1 1
C10
1
C11, C18, C19, C20, C26, C28, C33 C12
7 1
Note: Components in bold text are on the backside of the PC board. ________________________________________________________________ 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.
MAX2338 Evaluation Kit Evaluates: MAX2338
Component List (continued)
DESIGNATION L2, L12 L3 L4 L5 L6 L7, L8, L11 L10 T1 QTY 2 1 1 1 1 3 1 1 DESCRIPTION 2.7nH inductors Toko LL1608-FS2N7S 0 resistor (0603) 2.2nH inductor Toko LL1608-FS2N2S 3.9nH inductor Toko LL1608-FS2N9J 15nH inductor Toko LL1608-FS15J 120nH inductors Toko LL1608-FS15J Not installed Balun transformer Toko B5F 458Db-1011 MAX2338EGI 44-pin QFN NOTE: U1 HAS AN EXPOSED PADDLE WHICH IS SOLDERED TO THE CIRCUIT BOARD GROUND PLANE. DESIGNATION JU2 JU6, JU8, JU10 JU1, JU3, JU4, JU5, JU7 JU1, JU3, JU4, JU5, JU6, JU7, JU8, JU10 PMIXIN, CMIXIN, CLOOUT CLNAOUT, IFOUT, PLNAOUT, PLNAIN, CLNAIN, LOIN, PLOOUT, FMOUT VCC, GND None None None QTY 1 3 5 DESCRIPTION 20 1% resistor (0603) 1 2 headers (0.1 inch centers) 1 3 headers (0.1 inch centers)
8
Shunts
3
SMA connectors ( PC mount ) Johnson 142-0701-201
8
SMA connectors ( edge mount ) Johnson 142-0701-801
U1
1
2 1 1 1
Test points MAX2338 data sheet MAX2338 EV kit data sheet MAX2338 Rev A EV kit circuit board
________________________________________________________ Recommended Test Equipment
Power Supply RF Signal Generators (2) Network Analyzer Spectrum Analyzer Cables (50) Ammeter (optional) Noise Figure Meter (optional) Capable of providing at least 100mA at +2.7V to +3.3V. HP 8648C or equivalent, capable of delivering -50dBm to -10dBm of output power from 800MHz to 2500MHz. HP8753 or equivalent, covering the MAX2338 operating frequency range. HP8561E or equivalent, covering MAX2338 operating frequency range. Three 50 cables with SMA connectors. For measuring supply current. HP8970B or equivalent, for measuring the noise figure of the LNA and downconverters.
Quick Start
The MAX2338 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 MAX2338 EV kit and testing the LNA and downconverters. Do not turn on the DC power or RF signal generators until all connections are made.
2
_______________________________________________________________________________________
MAX2338 Evaluation Kit
Low-Noise Amplifier, High-Gain High-Linearity Mode 1) Set the GAIN jumper (JU4) on the EV kit to VCC (HIGH). This enables the LNA to operate in high gain mode. 2) Set the BAND jumper (JU1) on the EV kit to VCC (HIGH) to test cellular band [JU1 to GND for PCS]. 3) Set the LIN jumper (JU3) on the EV kit to V CC (HIGH) to test the amplifiers in high linearity mode. 4) 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. 5) Perform a full two-port calibration on a network analyzer at a power level of -30dBm over frequency range of 800MHz to 900MHz for cellular band [1900MHz to 2000MHz for PCS band]. 6) Connect port 1 and port 2 of the network analyzer to CLNAIN [PLNAIN for PCS] and CLNAOUT [PLNAOUT for PCS] respectively to measure the cellular [PCS] band gain. 7) Turn on the DC supply. If an ammeter is connected, the supply current should read approximately 28mA for cellular band [25mA for PCS]. 8) The network analyzer display should indicate a typical gain of 15.7dB for cellular band and 15.3dB for PCS band after accounting for board losses. The input and output board losses are 0.12dB for the cellular band. The input and output board losses for PCS band are 0.17dB and 0.3dB, respectively. These losses are to be added to the measurements to obtain the performance of the LNAs. Downconverter 1) Turn off the DC supply. 2) Remove the network analyzer from the LNA input and output connections. The DC supply connections needed for testing the downconverter mixer are the same as in the LNA section. 3) Set the LO/2 jumper (JU5) to VCC (ON) to enable the LO divider circuit for cellular band. When testing PCS band, this jumper setting has no effect. 4) Set the BAND jumper (JU1) on the EV kit to VCC (HIGH) to test cellular band [JU1 to GND for PCS]. 5) Set the LIN jumper (JU3) on the EV kit to V CC (HIGH) to test cellular and PCS downconverters in high-linearity mode. 6) Connect an RF signal generator (with output disabled) to the LOIN connector. Set the frequency to 2126MHz for cellular band [2143MHz for PCS] and the output power to -3dBm. 7) Connect another RF signal generator (with output disabled) to the CMIXIN SMA connector. Set the frequency to 880MHz for cellular band [1960MHz for PCS band] and the output power to -25dBm. 8) Connect the spectrum analyzer to the IFOUT SMA connector. Set the spectrum analyzer center frequency to 183MHz. 9) Turn on the DC supply. Enable the LO signal generator and RF input signal generator outputs. 10) Measure the peak of the 183MHz IF signal on the spectrum analyzer. Compensate the IF signal conversion gain for the balun and board losses. Balun loss is 0.3dB and the input and output board losses are 0.1dB each. 11) The conversion gain for cellular and PCS band are typically +13.3dB and +14.5dB respectively, after corrections from step 10 are applied.
Evaluates: MAX2338
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 Hewlett Packard application note #57-2, Noise Figure Measurement Accuracy.
PC Board Layout Considerations
The MAX2338 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.
_______________________________________________________________________________________
3
Evaluates: MAX2338
MAX2338 Evaluation Kit
Figure 1. MAX2338 EV Kit Schematic
4
VCC JU10 R14 20 L2 2.7nH SMA C8 0.75pF PLNAOUT L6 15nF R2 24.3k 1 2 PLNAIN GND U1 IF- 19 GND 18 BUFFEN 17 VCC 16 C27 100pF C26 1000pF C28 1000pF R8 1k VCC JU7 VCC C29 22F C31 4.7pF R11 8.25k C30 C12 15pF 0 GND VCC L8 120nH IF+ 20 VCC JU6 R7 3.32k L7 120nH 3 4 CLNAIN C21 OPEN C24 100pF C25 4.0pF CLNAOUT GND PLNAOUT GND RLNA GND PMIXIN CMIXIN 21 RBIAS C23 4.0pF C10 7pF C13 OPEN L4 C15 OPEN 2.2nH L5 3.9nH 28 R3 24.3k 27 26 25 24 23 22 L10 OPEN C6 OPEN C9 0.01F L12 2.7nH SMA PMIXIN L3 0 C5 6800pF JU2 L1 8.2nH VCC C3 100pF C4 0.01F C1 0.01F C7 2.7pF C2 100pF SMA CMIXIN 3 2 1 4 6 T1 BALUNTOKO85F 45808-1011 SMA IFOUT
SMA CLNAOUT
SMA PLNAIN
C14 6800pF
SMA CLNAIN
C16 6800pF
MAX2338
VCC VCC 5 BAND R1 1k
C17 OPEN
JU1 R4 1k R5 1k R6 1k C20 1000pF SMA LOIN SMA PLOOUT R9 0 R10 0 SMA CLOOUT
VCC
JU3
JU4 LO/2 LOIN 9 10 C22 22pF
VCC
C11 1000pF 6 LIN C18 1000pF 7 GAIN C19 GND 1000pF 8 FM 15 GND PLOOUT CLOOUT N/C L11 120nH 11 12 13 14 VCC JU8 R12 R13 OPEN OPEN
SMA FMOUT
_______________________________________________________________________________________
C33 1000pF
JU5
MAX2338 Evaluation Kit Evaluates: MAX2338
1.0"
1.0"
Figure 2. MAX2338 EV Kit PC Board Layout--Front Side
Figure 3. MAX2338 EV Kit PC Board Layout--Ground Layer 2
1.0"
1.0"
Figure 4. MAX2338 EV Kit PC Board Layout--Ground Layer 3
Figure 5. MAX2338 EV Kit PC Board Layout--Back Side
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5
MAX2338 Evaluation Kit Evaluates: MAX2338
1.0"
Figure 6. MAX2338 EV Kit Component Placement Guide--Front Side
1.0"
Figure 7. MAX2338 EV Kit Component Placement Guide--Back Side
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.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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