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19-1834; Rev 1; 5/01
MAX2387/MAX2388/MAX2389 Evaluation Kits
General Description
The MAX2387/MAX2388/MAX2389 evaluation kits (EV kits) simplify evaluation of the MAX2387/MAX2388/ MAX2389. The EV kits allow the evaluation of the lownoise amplifier (LNA) as well as the downconverter mixer without the use of any additional support circuitry. The board comes in a single-ended IF load and singleended VCO configuration. The signal inputs and outputs use SMA connectors to simplify the connection of RF test equipment. The MAX2387/MAX2388/MAX2389 are assembled with an associated IC and incorporate input- and outputmatching components optimized for RF frequencies from 2.11GHz to 2.17GHz and an IF frequency of 190MHz.
Features
o +2.7V to +3.3V Single-Supply Operation o 50 SMA Inputs and Outputs on RF, IF, and LO Ports for Easy Testing o All Matching Components Included o Fully Assembled and Tested
Evaluate: MAX2387/MAX2388/MAX2389
Ordering Information
PART MAX2387EVKIT MAX2388EVKIT MAX2389EVKIT TEMP RANGE -40C to +85C -40C to +85C -40C to +85C IC PACKAGE 12 QFN 12 QFN 12 QFN
Component List
DESIGNATION QTY C1, C18, C19, C22 C2, C27 4 DESCRIPTION 6800pF 10%, 10V ceramic capacitors (0402) Murata GRM36X7R682K025 0.8pF 0.1pF, 50V ceramic capacitors (0402) Murata GRM36COG0R8B050 82pF 5%, 10V ceramic capacitors (0402) Murata GRM36COG820J050 0.068F 10%, 10V ceramic capacitor (0402) Murata GRM36X5R683K010 Not installed 0.5pF 0.1pF, 50V ceramic capacitor (0402) Murata GRM36COG0R5B050 0.01F 10%, 16V ceramic capacitors (0402) Murata GRM36X7R103K016 or Taiyo Yuden EMK105B103KW 39pF 5%, 50V ceramic capacitors (0402) Murata GRM36COG390J050 22pF 5%, 050 ceramic capacitors (0402) Murata GRM36COG220J050 or Taiyo Yuden UMK105CH220JW 0.01F 10%, 16V ceramic capacitor (0603) Murata GRM39X7R103K016 DESIGNATION QTY C21 L1, L4 L2, L3 C9, L5, L6 L7 R1 R2, R3 R4 R5 T1 T2 LNA_IN, LNA_OUT, LO, MIX_IN, IF JU1, JU2 None VCC, GND 1 2 2 3 1 1 2 1 1 1 1 5 2 2 2 DESCRIPTION 10F 20%, 10V tantalum capacitor (B case) AVX TAJB106M010R 2.2nH 10% inductors (0402) Coilcraft 0402CS-2N2XKBG 27nH 5% inductors (0603) Coilcraft 0603CS-27NXJBC 0 resistors (0402) 5.6nH 5% inductor (0402) Coilcraft 0402CS-5N6XJBG 20 5% resistor (0402) 10k 5% resistors (0402) 10k 1% resistor (0402) 24k 1% resistor (0402) Balun transformer (B4F type) Toko 617DB-1018 Balun transformer Murata LDB15C201A2400 SMA connectors (PC-edge mount) EFJohnson 142-0701-801 or Digi-Key J502-ND 3-pin headers Digi-Key S1012-36-ND or equivalent Shunts for JU1-JU12 Digi-Key S9000-ND or equivalent Test points Mouser 151-203 or equivalent
2
C3, C5
2
C4 C6, C7, C8, C17 C11
1 0 1
C12, C13, C24, C25, C26
5
C14, C15
2
C16, C23
2
C20
1
________________________________________________________________ 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.
MAX2387/MAX2388/MAX2389 Evaluation Kits Evaluate: MAX2387/MAX2388/MAX2389
Component Suppliers
SUPPLIER AVX Coilcraft Murata PHONE 847-946-0690 847-639-6400 770-436-1300 FAX 803-626-3123 847-639-1469 770-436-3030 RF Spectrum Analyzer Power Supply
Table 1. Test Equipment
EQUIPMENT RF Signal Generators DESCRIPTION Capable of delivering at least 0dBm of output power up to 2.5GHz (HP 8648C or equivalent) Capable of covering the operating frequency range of the devices as well as a few harmonics (HP 8561E or equivalent) Capable of up to 40mA at +2.7V to +3.3V To measure supply current (optional) To measure small-signal return loss and gain (optional, HP 8753D or equivalent)
Toko 708-297-0070 708-699-1194 Note: Please indicate that you are using the MAX2387/ MAX2388/MAX2389 when contacting these component suppliers.
Quick Start
The MAX2387/MAX2388/MAX2389 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation.
Ammeter Network Analyzer
Test Equipment Required
Table 1 lists the test equipment required to verify MAX2387/MAX2388/MAX2389 operation. It is intended as a guide only, and some substitutions are possible.
Connections and Setup
This section provides a step-by-step guide to operating the EV kits and testing the devices' functions. Do not turn on DC power or RF signal generators until all connections are made. Testing the LNA 1) Set the SHDN jumper (JU2) on the EV kit to VCC. This enables the device. 2) Set the GAIN jumper (JU1) on the EV kit to VCC (high-gain mode) or to GND (low-gain mode). 3) Connect a DC supply set to +2.7V (through an ammeter if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 20mA. Do not turn on the supply. 4) Connect one RF signal generator to the LNA_IN SMA connector. Do not turn on the generator's output. Set the generator to an output frequency of 2.14GHz and set the generator power level to -30dBm. 5) Connect the spectrum analyzer to the LNA_OUT SMA connector. Set the spectrum analyzer to a center frequency of 2.14GHz and a total span of 10MHz. 6) Turn on the DC supply; the supply current should read approximately 6.5mA (low-gain mode) or 9.5mA (high-gain mode), depending on the part version.
7) Activate the RF generator's output. A 2.14GHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -15dBm in highgain mode. In low-gain mode the magnitude should read approximately -46.5dBm for the MAX2387 and -33dBm for the MAX2388/MAX2389. Be sure to account for cable losses (between 0.5dB and 2dB) and circuit board losses (approximately 0.5dB) when computing gain and noise figure. 8) (Optional) Another method for determining gain is by using a network analyzer. This has the advantage of displaying gain over a swept frequency band, in addition to displaying input and output return loss. Refer to the network analyzer manufacturer's user manual for setup details. Testing the Mixer 1) Connect a DC supply set to +2.7V (through an ammeter if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 20mA. Do not turn on the supply. 2) Connect one RF signal generator to the LO SMA connector. Do not turn on the generator output. Set the frequency to 2.33GHz, and output power to -10dBm (MAX2387/MAX2388) or -4dBm (MAX2389). This is the LO signal. 3) Connect another RF signal generator to the MIX_IN SMA connector. Do not turn on the generator output. Set the signal generator to 2.14GHz and output power level to -30dBm. 4) Connect the spectrum analyzer to the IF SMA connector. Set the spectrum analyzer to a center frequency of 190MHz and a total span of 10MHz.
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MAX2387/MAX2388/MAX2389 Evaluation Kits
5) Turn on the DC supply and the signal generator outputs. 6) A 190MHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -20dBm, indicating a conversion gain of 10dB. Be sure to account for cable losses (between 0.5dB and 2dB) and circuit board losses including the balun (approximately 1.0dB) when computing gain and noise figure.
Layout
A good PC board layout is an essential part of an RF circuit design. The EV kit's PC board can serve as a guide for laying out a board using the MAX2387/ MAX2388/MAX2389. Keep RF signal lines as short as possible to minimize losses and radiation. Always use controlled impedance lines on all high-frequency inputs and outputs and use low-inductance connections to ground on all GND pins. At the mixer outputs, keep the differential lines together and of the same length to ensure signal balance.
Evaluate: MAX2387/MAX2388/MAX2389
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Evaluate: MAX2387/MAX2388/MAX2389
MAX2387/MAX2388/MAX2389 Evaluation Kits
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C1 6800pF C23 22pF 12 11 10 LNA_IN 9 VCC C18 6800pF C19 6800pF C26 0.01F C25 0.01F C20 0.01F (0603) C21 10F 10V GND BIAS_SET 1 LNA_OUT VCC C27 0.8pF R5 24k 1% SMA LNA_IN L4 2.2nH C22 6800pF VCC GND R2 10k 5% 2 GAIN C13 0.01F SMA MIX_IN C4 0.068F 3 MIX_IN SHDN 4 LO+ 5 C8 OPEN C24 0.01F L6 0 4 OUTOUT+ 3 5 2 GND GND 6 1 UNUSED INPUT T2 BALUN_LDB15C20 C9 0 L5 0 L7 5.6nH C3 82pF C7 OPEN C5 82pF VCC R3 10k 5% IFLO6 7 C14 39pF R4 10k 1% C11 0.5pF L2 27nH (0603) L3 27nH (0603) VCC C12 0.01F C15 39pF C16 22pF IF+ 8 C17 OPEN SMA IF 4 6 T1 617DB-1018 3 2 1
VCC
R1 20 5%
L1 2.2nH
SMA C2 LNA_OUT 0.8pF
Figure 1. MAX2387/MAX2388/MAX2389 EV Kit Schematic
MAX2387 MAX2388 MAX2389
1 2 JU2 3 C6 OPEN SMA LO1
VCC
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1 2 3
JU1
MAX2387/MAX2388/MAX2389 Evaluation Kits Evaluate: MAX2387/MAX2388/MAX2389
1.0"
Figure 2. MAX2387/MAX2388/MAX2389 EV Kit Component Placement Guide--Component Side
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Figure 3. MAX2387/MAX2388/MAX2389 EV Kit Component Placement Guide--Solder Side
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Figure 4. MAX2387/MAX2388/MAX2389 EV Kit PC Board Layout--Component Side
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Figure 5. MAX2387/MAX2388/MAX2389 EV Kit PC Board Layout--Ground Layer 2
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MAX2387/MAX2388/MAX2389 Evaluation Kits Evaluate: MAX2387/MAX2388/MAX2389
1.0"
Figure 6. MAX2387/MAX2388/MAX2389 EV Kit PC Board Layout--Ground Layer 3
1.0"
Figure 7. MAX2387/MAX2388/MAX2389 EV Kit PC Board Layout--Solder 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) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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