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19-2355; Rev 0; 2/02
MAX2371/MAX2373 Evaluation Kits
General Description
The MAX2371/MAX2373 evaluation kits (EV kits) simplify evaluation of the MAX2371/MAX2373 low-noise amplifiers (LNAs). They enable testing of the devices' radio frequency (RF) performance and require no additional support circuitry. The EV kits' signal inputs and outputs use SMA connectors to facilitate the connection of RF test equipment.
Features
o Easy Evaluation of the MAX2371/MAX2373 o 2.65V to 3.3V Single-Supply Operation o Jumpers for Analog/Digital Control o All Critical Peripheral Components Included o Fully Assembled and Tested
Evaluate: MAX2371/MAX2373
Ordering Information
PART MAX2371EVKIT MAX2373EVKIT TEMP RANGE -40C to +85C -40C to +85C IC PACKAGE 12 QFN 12 QFN
MAX2371 Component List
DESIGNATION QTY C1, C3, C7 C2 3 1 Open 15pF 5% capacitor Taiyo Yuden 0402_UMK105CH150JW-B 1500pF 10% capacitors Murata 0402_GRP155R71H152K 6.8pF 0.5pF capacitor Murata 0402_GRP1555C1H6R8DZ01E 1.0F 20% capacitor Taiyo Yuden 0805_LMK212BJ105MG-B 10nF 10% capacitor Murata 0402_GRP155R71C103K 0.015F 10% capacitor Taiyo Yuden 0402_EMK105B153KW-B 100nF 10% capacitor Murata 0402_GRP155R61A104K DESCRIPTION DESIGNATION QTY R1 R2 R3 L1 L2 L4 L5 U1 J1, J2, J3 J4 J5, J6 P1, P2 1 1 1 1 1 1 1 1 3 1 2 2 DESCRIPTION 1.10k 1% resistor CC0402 750 1% resistor CC0402 0 resistor CC0402 Open 56nH inductor Coilcraft 1008CS-560XJBC 33nH 5% inductor Murata 0603_LQG18HN33NJ00 120nH 5% inductor Coilcraft 1008CS-121XJBB MAX2371EGC Maxim MAX2371EGC 1 3-pin headers Digi-Key S1012-36-ND 1 6-pin header Digi-Key S1012-36-ND 1 2-pin headers Digi-Key S1012-36-ND SMA connectors (edge mount) Johnson 142-0701-801
C4, C5
2
C6
1
C8
1
C9
1
C10
1
C19
1
________________________________________________________________ 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.
MAX2371/MAX2373 Evaluation Kits Evaluate: MAX2371/MAX2373
MAX2373 Component List
DESIGNATION QTY C11 1 DESCRIPTION 100nF 10% capacitor Murata 0402_GRP155R61A104K 0.015F 10% capacitor Taiyo Yuden 0402_EMK105B153KW-B 100pF 5% capacitors Murata 0402_GRP1555C1H101J 1.3pF 0.1pF capacitor Murata 0402_GRP1555C1H1R3B 1.0F 20% capacitor Taiyo Yuden 0805_LMK212BJ105MG-B Open 10nF 10% capacitor Murata 0402_GRP155R71C103K 1.10k 1% resistor CC0402 1.5k 1% resistor CC0402 0 resistor CC0402 15nH 5% inductor Coilcraft 0402CS-15NXJBW 4.7nH 0.2nH inductor Murata 0402_LQP15MN4N7C00 1.8nH 0.3nH inductor Murata 0402_LQG15HN1N8S00 12nH 5% inductor Murata 0402_LQG15HN12NJ00 MAX2373EGC Maxim MAX2373EGC 1 3-pin headers Digi-Key S1012-36-ND 1 6-pin header Digi-Key S1012-36-ND 1 2-pin headers Digi-Key S1012-36-ND SMA connectors (edge mount) Johnson 142-0701-801 SUPPLIER CoilCraft Digi-Key Murata Taiyo Yuden
Component Suppliers
PHONE 847-639-6400 800-344-4539 770-436-1300 800-348-2496 FAX 847-639-1469 218-681-3380 770-436-3030 847-925-0899
C12
1
Note: Please indicate that you are using the MAX2371/MAX2373 when contacting these component suppliers.
C13, C14 C15
2 1
Quick Start
The MAX2371/MAX2373 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation.
C16 C17 C18 R4 R5 R6 L6 L8 L9 L10 U2 J7, J8, J9 J10 J11, J12 P3, P4
1 1 1 1 1 1 1 1 1 1 1 3 1 2 2
Test Equipment Required
This section lists the recommended test equipment to verify operation of the MAX2371/MAX2373. It is intended as a guide only, and some substitutions are possible. * Two RF signal generators capable of delivering at least 5dBm of output power at the operating frequency (HPE4433B or equivalent) * One RF power sensor capable of handling at least 20dBm of output power at the operating frequency (HP8482A or equivalent) * One RF power meter capable of measuring up to 20dBm of output power at the operating frequency (HP437B or equivalent) * An RF spectrum analyzer that covers the MAX2371/MAX2373 operating frequency range, as well as a few harmonics (FSEB20, for example) * A network analyzer (HP8753D, for example) to measure small-signal return loss and gain (optional) * Two power supplies capable of up to 1A at 2.65V to 3.3V * An optional ammeter for measuring the supply current * SMA cables
Connections and Setup
This section provides a step-by-step guide to operating the EV kits and testing the devices' function. Do not turn on the DC power or RF signal generators until all connections are made: 1) Connect a DC supply set to 2.775V (through an ammeter if desired) to the VCC and GND on the EV kit. Do not turn on the supply. 2) Connect one RF signal generator to the LNA_IN
2
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MAX2371/MAX2373 Evaluation Kits
SMA connector. Do not turn on the generator's output. Set the generator for proper output frequency and power level. 3) Connect the spectrum analyzer to LNA_OUT. Set the spectrum analyzer to a center frequency of 150MHz (MAX2371) or 900MHz (MAX2373). 4) Connect the jumpers to set the desired mode of operation (RX Enable/Disable, High/Low Attenuation, High/Low Current). 5) Connect a DC supply set to 1.3875V (V CC/2 for maximum gain) to AGC. Do not turn on the supply. 6) Turn on the DC supplies. 7) Activate the RF generator's output. Refer to the Electrical Characteristics Table in the data sheet for specifications in different operation modes. 8) Another method for determining gain is by using a network analyzer (optional). This has the advantage of displaying gain versus a swept-frequency band, in addition to displaying input return loss. Refer to the network analyzer manufacturer's user manual for setup details.
Evaluate: MAX2371/MAX2373
Layout Issues
A good PC board is an essential part of an RF circuit design. The EV kit PC board can serve as a guide for laying out a board using the MAX2371/MAX2373. Keep traces carrying RF signals as short as possible to minimize radiation and insertion loss. Use impedance control on all RF signal traces. VCC nodes on the PC board should have decoupling capacitors to the closest ground. Refer to the Layout section of the MAX2371/ MAX2373 data sheet for more information.
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3
MAX2371/MAX2373 Evaluation Kits Evaluate: MAX2371/MAX2373
VCC C4 1500pF R1 1.1k SMA_EDGE_62 P1 1 2 L1 OPEN C2 15pF C1 OPEN C19 100nF 1 C3 OPEN 12 GND LNA_IN 11 RF_VCC 10 RSET AGC_BYP 9 C10 0.015F VCC
L2 56nH
U1
2 L4 33nH LNA_E
MAX2371
LNA_VCC
8 C5 1500pF L5 120nH R2 750
3 VCC 1 2 J1 3 C7 OPEN
RX_EN RF_ATTN 4 VCC 2 C9 10nF R3 0 AGC 5
LNA_OUT LNA_I 6
7
C6 SMA_EDGE_62 6.8pF P2 1 2
VCC 1 2 J3 3 VCC J4-6
VCC J5 C8 1F
1
J2
J6
J4-1
3 J4-2
J4-3
J4-4
Figure 1. MAX2371 EV Kit Schematic 4 _______________________________________________________________________________________
J4-5
MAX2371/MAX2373 Evaluation Kits Evaluate: MAX2371/MAX2373
VCC2 C13 100pF R4 1.1k SMA_EDGE_62 P3 1 2 L6 15nH C11 100nF L8 4.7nH 12 GND 1 LNA_IN 11 RF_VCC 10 RSET AGC_BYP 9 C12 0.015F VCC2
U2
2 L9 1.8nH LNA_E
MAX2373
LNA_VCC
8 C14 100pF L10 12nH R5 1.5k
3 VCC2 1 2 J7 3 C17 OPEN
RX_EN RF_ATTN 4 VCC2 2 C18 10nF R6 0 AGC 5
LNA_OUT LNA_I 6
7
C15 SMA_EDGE_62 1.3pF P4 1 2
VCC2 1 2 J9 3 VCC2 J10-6
VCC2 J11 C16 1F
1
J8
J12
J10-1
3 J10-2
J10-3
J10-4
Figure 2. MAX2373 EV Kit Schematic _______________________________________________________________________________________ 5
J10-5
MAX2371/MAX2373 Evaluation Kits Evaluate: MAX2371/MAX2373
1.0"
1.0"
Figure 3. MAX2371/MAX2373 EV Kit Component Placement Guide--Component Side
Figure 4. MAX2371/MAX2373 EV Kit PC Board Layout--Layer 2
1.0"
1.0"
Figure 5. MAX2371/MAX2373 EV Kit PC Board Layout--Layer 3
Figure 6. MAX2371/MAX2373 EV Kit PC Board Layout-- Primary Component Side
6
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MAX2371/MAX2373 Evaluation Kits Evaluate: MAX2371/MAX2373
1.0"
Figure 7. MAX2371/MAX2373 EV Kit PC Board Layout-- Secondary 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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