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 low-
noise 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 single-
ended VCO configuration. The signal inputs and out-
puts 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 output-
matching 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
50Ω 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
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
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
0.068µF ±10%, 10V ceramic
capacitor (0402)
Murata GRM36X5R683K010
Not installed
0.5pF ±0.1pF, 50V ceramic
capacitor (0402)
Murata GRM36COG0R5B050
0.01µF ±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
0.01µF ±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
10µF ±20%, 10V tantalum
capacitor (B case)
AVX TAJB106M010R
2.2nH ±10% inductors (0402)
Coilcraft 0402CS-2N2XKBG
27nH ±5% inductors (0603)
Coilcraft 0603CS-27NXJBC
0Ω resistors (0402)
5.6nH ±5% inductor (0402)
Coilcraft 0402CS-5N6XJBG
20Ω ±5% resistor (0402)
10kΩ ±5% resistors (0402)
10kΩ ±1% resistor (0402)
24kΩ ±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
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.
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 cen-
ter 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 indi-
cate a magnitude of approximately -15dBm in high-
gain 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 con-
nector. Set the spectrum analyzer to a center fre-
quency of 190MHz and a total span of 10MHz.
2
_______________________________________________________________________________________
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 approxi-
mately -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
_______________________________________________________________________________________
3
Evaluate: MAX2387/MAX2388/MAX2389
MAX2387/MAX2388/MAX2389 Evaluation Kits
4
R5
24kΩ
1%
SMA
LNA_IN
L4
2.2nH
C27
0.8pF
12
11
10
LNA_IN
9
V
CC
C18
6800pF
C21
10µF
10V
C19
6800pF
C26
0.01µF
C25
0.01µF
C20
0.01µF
(0603)
GND
BIAS_SET
1
LNA_OUT
VCC
C22
6800pF
C23
22pF
VCC
GND
2
GAIN
C15
39pF
C16
22pF
L3
27nH
(0603)
VCC
C11
0.5pF
C12
0.01µF
L2
27nH
(0603)
C17
OPEN
IF+
8
SMA
IF
4
6
T1
617DB-1018
3
2
1
VCC
R1
20Ω
5%
C1
6800pF
L1
2.2nH
SMA
C2
LNA_OUT 0.8pF
Figure 1. MAX2387/MAX2388/MAX2389 EV Kit Schematic
MAX2387
MAX2388
MAX2389
R4
10kΩ
1%
7
C14
39pF
C7
OPEN
L5
0Ω
IF-
LO-
6
C3
82pF
L7
5.6nH
C6
OPEN
SMA
LO1
C9
0Ω
C5
82pF
3
MIX_IN
SHDN
4
LO+
5
C8
OPEN
C24
0.01µF
L6
0Ω
4 OUT-
OUT+ 3
5
2
GND
GND
6
1
UNUSED INPUT
T2
BALUN_LDB15C20
R3
10kΩ
5%
VCC
1
2
3
JU1
R2
10kΩ
5%
C13
0.01µF
SMA
MIX_IN
C4
0.068µF
VCC
1
2
JU2
_______________________________________________________________________________________
3
MAX2387/MAX2388/MAX2389 Evaluation Kits
Evaluate: MAX2387/MAX2388/MAX2389
1.0"
Figure 2. MAX2387/MAX2388/MAX2389 EV Kit Component
Placement Guide—Component Side
1.0"
Figure 3. MAX2387/MAX2388/MAX2389 EV Kit Component
Placement Guide—Solder Side
1.0"
Figure 4. MAX2387/MAX2388/MAX2389 EV Kit PC Board
Layout—Component Side
1.0"
Figure 5. MAX2387/MAX2388/MAX2389 EV Kit PC Board
Layout—Ground Layer 2
_______________________________________________________________________________________
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
