19-4008; Rev 0; 2/06
MAX2335 Evaluation Kit
General Description
The MAX2335 evaluation kit (EV kit) simplifies evalua-
tion 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 pro-
vides 50Ω 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
-40°C to +85°C
*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
0.01µF ±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
22µF ±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
1kΩ ±5% resistors (0402)
Open
18.2kΩ ±1% resistor (0402)
1kΩ ±1% resistor (0402)
24.3kΩ ±1% resistor (0603)
0Ω ±5% resistors (0402)
20Ω ±1% resistor (0402)
475Ω ±1% resistor (0603)
Balun transformer
TOKO B5F 458DB-1011
MAX2335ETI 28-pin TQFN-EP
Test points
Digi-Key 5000K-ND
________________________________________________________________
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.
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 typ-
ical 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 perfor-
mance of the LNA.
1)
2)
Downconverter, High-Gain High-Linearity Mode
Turn off the DC supply.
Remove the network analyzer from the LNA input
and output connections. The DC supply connec-
tions for testing the downconverter mixer are the
same as the LNA section.
Set the LO/2 jumper (JU5) to VCC to enable the LO
divider circuit.
The mode setting for testing the downconverter
mixer is the same as the LNA section.
Connect an RF signal generator (with output dis-
abled) to the LOIN connector. Set the frequency to
1150MHz and the output power to -7dBm.
Connect another RF signal generator (with output
disabled) to the MIXIN SMA connector. Set the fre-
quency to 465MHz and the output power to -40dBm.
Connect the spectrum analyzer to the IFOUT SMA
connector. Set the spectrum-analyzer center fre-
quency to 110MHz.
Turn on the DC supply. Enable the LO signal gener-
ator and RF input signal generator outputs.
Measure the peak of the 110MHz IF signal on the
spectrum analyzer. Compensate the IF signal con-
version 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.
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
sec-
tion for proper device evaluation.
3)
4)
5)
Connections and Setup
This section provides a step-by-step guide to setting
up the MAX2335 EV kit and testing the LNA and down-
converters.
Do not turn on the DC power or RF sig-
nal 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 oper-
ate 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 ana-
lyzer at a -30dBm power level over a 400MHz to
500MHz frequency range.
6)
7)
8)
9)
10)
2
_______________________________________________________________________________________
MAX2335 Evaluation Kit
Checking Noise Figure
Noise
figure
measurements are sensitive to board and
lab setup losses and parasitics. There are many tech-
niques and precautions for measuring a low noise
fig-
ure.
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
20Ω
JU2
L1
18nH
R15
475Ω
VCC
L2
0Ω
C8
OPEN
J5
OPEN
C3
OPEN
C4
OPEN
C1
0.01µF
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
V
CC
25
N.C.
24
N.C.
23
I.C.
22
MIXIN
21
R
BIAS
IF_CDMA+
U1
20
C9
0.01µF
C10
OPEN
MIXIN
LNAOUT N.C.
1 DEGEN
2
R
LNA
GND
R3
18.2kΩ
C21
OPEN
C23
6.8pF
C24
100pF
C25
6.8pF
3
2
1
L10
OPEN
J1
OPEN
C14
OPEN
R16
0Ω
C16
6800pF
VCC
R7
1kΩ
JU6
R10
24.3kΩ
L5
22nH
C17
OPEN
L7
270nH
L8
270nH
VCC
4
6
IFOUT
3
IF_CDMA- 19
N.C. 18
BUFFEN 17
V
CC
16
LNAIN
VCC
VCC
VCC
JU3
JU4
4 LNAIN
5 MODE0
MAX2335
R8
1kΩ
C26
1000pF
C27
100pF
C28
1000pF
JU7
VCC
C29
22µF
C31
OPEN
VCC
T1
BALUN TOKO 85F
45808-1011
JU1
R4
1kΩ
R5
1kΩ
R1
1kΩ
VCC
C11
1000pF 6
MODE1
C18
1000pF
7 MODE2
C19
N.C.
1000pF
8
R6
1kΩ
GND
LO/2
9
LO_IN
10
JU5
C20
1000pF
LOIN
C22
100pF
V
CC
15
N.C.
I.C. LO_OUT N.C.
L11
11
12
13
14
OPEN
VCC
JU8
R12
R13
OPEN
OPEN
R9
OPEN
J2
OPEN
L13
47nH
LOOUT
R11
0Ω
C33
OPEN
C30
C12
OPEN OPEN
J3
OPEN
Figure
1. MAX2335 EV Kit Schematic
_______________________________________________________________________________________
3
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
