19-2793; Rev 0a; 4/03
MAX2045/MAX2046/MAX2047 Evaluation Kits
General Description
The MAX2045/MAX2046/MAX2047 evaluation kits
(EV kits) simplify evaluation of the MAX2045/MAX2046/
MAX2047 vector multipliers. Each kit enables testing of
the device’s RF performance and requires no additional
support circuitry. The EV kit input and output use SMA
connectors and baluns (for single-ended-to-differential
conversions) to facilitate the connection to RF test
equipment.
Each EV kit is assembled with either the MAX2045,
MAX2046, or MAX2047 and incorporates all matching
components optimized for the corresponding band of
frequency operation.
Features
o
Easy Evaluation of the MAX2045/MAX2046/
MAX2047
o
+4.75V to +5.25V Single-Supply Operation
o
Include RF Input and Output Matching
2040MHz to 2240MHz (MAX2045)
1740MHz to 2060MHz (MAX2046)
790MHz to 1005MHz (MAX2047)
o
Configurable for Current-Control Mode and
Single-Ended and Differential Voltage-Control
Mode
o
Fully Assembled and Tested
Evaluate: MAX2045/MAX2046/MAX2047
Component Suppliers
SUPPLIER
Murata
Toko
PHONE
800-831-9172
800-745-8656
FAX
814-238-0490
—
PART
MAX2045EVKIT
MAX2046EVKIT
MAX2047EVKIT
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
IC PACKAGE
32 QFN-EP*
32 QFN-EP*
32 QFN-EP*
Note:
When contacting these suppliers, please indicate that
you are using the MAX2045/MAX2046/MAX2047.
*EP
= Exposed paddle.
MAX2045 Component List
DESIGNATION
C1, C4–C16
QTY
14
DESCRIPTION
22pF
±5%,
50V C0G ceramic
capacitors (0402)
Murata GRP1555C1H220J
220pF
±10%,
50V X7R ceramic
capacitors (0402)
Murata GRP155R71H221K
0.01µF
±10%,
25V X7R ceramic
capacitor (0402)
Murata GRP155R71E103K
PC board edge-mount SMA RF
connectors (flat-tab launch)
EFJohnson 142-0741-856
Header, 10 x 2, 0.100in spacing
Molex 10-89-1201
DESIGNATION
L1
QTY
1
DESCRIPTION
1.5pF
±0.1pF,
50V C0G ceramic
capacitor (0402)
Murata GRP1555C1H1R5B
8.2nH
±5%
chip inductor (0402)
Toko LL1005-FH8N2J
280Ω
±1%
resistor (0402)
Any
Not installed
0Ω resistors (0402)
Any
1:1 balun (50:50)
Murata LDB15C500A1900
4:1 balun (200:50)
Murata LDB15C201A1900
MAX2045ETJ-T (32-pin QFN)
L2
R1
R2, R4, R6
R3, R5
T1
T2
U1
1
1
0
2
1
1
1
C2, C3
2
C17
1
J1, J2
2
J3
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.
MAX2045/MAX2046/MAX2047 Evaluation Kits
Evaluate: MAX2045/MAX2046/MAX2047
MAX2046 Component List
DESIGNATION
C1
QTY
1
DESCRIPTION
3.9pF
±0.1pF,
50V C0G ceramic
capacitor (0402)
Murata GRP1555C1H3R9B
220pF
±10%,
50V X7R ceramic
capacitors (0402)
Murata GRP155R71H221K
22pF
±5%,
50V C0G ceramic
capacitors (0402)
Murata GRP1555C1H220J
6.2pF
±0.25pF,
50V C0G ceramic
capacitor (0402)
Murata GRP1555C1H6R2C
0.01µF
±10%,
25V X7R ceramic
capacitor (0402)
Murata GRP155R71E103K
PC board edge-mount SMA RF
connectors (flat-tab launch)
EFJohnson 142-0741-856
Header 10 x 2, 0.100in spacing
Molex 10-89-1201
1.5pF
±0.1pF,
50V C0G ceramic
capacitor (0402)
Murata GRP1555C1H1R5B
12nH
±5%
chip inductor (0402)
Toko LL1005-FH12NJ
280Ω
±1%
resistor (0402)
Any
Not installed
0Ω resistors (0402)
Any
1:1 balun (50:50)
Murata LDB15C500A1900
4:1 balun (200:50)
Murata LDB15C201A1900
MAX2046ETJ-T (32-pin QFN)
MAX2047 Component List
DESIGNATION
C1–C16
QTY
16
DESCRIPTION
47pF
±5%,
50V C0G ceramic
capacitors (0402)
Murata GRP1555C1H470J
0.01µF
±10%,
25V X7R ceramic
capacitor (0402)
Murata GRP155R71E103K
PC board edge-mount SMA RF
connectors (flat-tab launch)
EFJohnson 142-0741-856
Header 10 x 2, 0.100in spacing
Molex 10-89-1201
15nH
±5%
chip inductor (0402)
Toko LL1005-FH15NJ
39nH
±5%
chip inductor (0402)
Toko LL1005-FH39NJ
280Ω
±1%
resistor (0402)
Any
Not installed
0Ω resistors (0402)
Any
1:1 balun (50:50)
Murata LDB20C500A900
4:1 balun (200:50)
Murata LDB20C201A900
MAX2047ETJ-T (32-pin QFN)
C2, C3
2
C17
1
C4–C13,
C15, C16
12
J1, J2
2
C14
1
J3
L1
1
1
1
1
0
2
1
1
1
C17
1
L2
R1
R2, R4, R6
R3, R5
T1
T2
U1
J1, J2
2
J3
1
L1
1
L2
R1
R2, R4, R6
R3, R5
T1
T2
U1
1
1
0
2
1
1
1
Quick Start
The MAX2045/MAX2046/MAX2047 EV kits are fully
assembled and factory tested. Follow the instructions
in the
Connections and Setup
section for proper
device evaluation. The EV kits come configured for sin-
gle-ended, voltage-control operation. For differential
voltage- or current-mode operation, see the
Detailed
Description
section.
Test Equipment Required
Table 1 lists the required test equipment to verify the
MAX2045/MAX2046/MAX2047 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 operat-
ing the EV kits and testing the devices’ functions. Do
not turn on DC power or RF signal generators until all
connections are made.
2
_______________________________________________________________________________________
MAX2045/MAX2046/MAX2047 Evaluation Kits
Table 1. Required Test Equipment
EQUIPMENT
Power supply
Power supplies
Current sources
(optional)
Low-noise RF signal
generators
Network analyzer
Ammeter/voltmeters
50Ω SMA cables
QTY
1
2
2
2
1
2
2
DESCRIPTION
Capable of delivering up to
250mA at 4.75V to 5.25V
Capable of swinging from 0
to +5.5V
Capable of delivering 5mA of
current
HP 8648B or equivalent
HP 8753ES or equivalent
—
—
4) Configure the network analyzer to measure S21. The
analyzer should read approximately 6.2dB gain at f
IN
= 2140MHz (MAX2045), 6.6dB gain at f
IN
=
1900MHz (MAX2046), and 8.1dB gain at f
IN
=
915MHz (MAX2047).
5) Changing the current source value changes the
magnitude of the gain. To adjust the phase, use sep-
arate current sources on the II1 and IQ1 terminals.
Evaluate: MAX2045/MAX2046/MAX2047
Detailed Description
The EV kits come with all necessary components for
easy testing. For each kit, make sure all ground pins on
the 20-lead header are connected to ground. The
REFOUT voltage can be monitored from pins 17 and 18
on the 20-lead header by installing a 0Ω resistor for R6.
To operate the device in differential voltage-control
mode, remove R5 and R3, and install 0Ω resistors for
R2 and R4. Figure 1 shows the connections on the 20-
pin header corresponding to the voltage- and current-
control inputs. Using this configuration, an external DC
source can also be applied to VI2 and VQ2 for single-
ended operation using an external regulated voltage.
For current-mode operation, leave the VI and VQ (header
pins 1, 2, 5, and 6) open, and remove R3 and R5.
Testing the Supply Current
1) If available, set the current limit of the power supply
to 250mA. Do not turn on the supply. Connect the
DC supply set to 5V, through an ammeter, to the
VCC and GND terminals on the EV kit. Use a volt-
meter to verify that the voltage is at V
CC
= 5V.
2) Turn on the DC supply; the supply current should
read approximately 160mA.
Testing the Gain (Single-Ended Voltage Mode)
1) Connect a DC supply set to +3.2V to the VI1 and
VQ1 terminals (Figure 1).
2) Using a calibrated network analyzer, connect port 1
to the RF_IN terminal (SMA J1) and port 2 to the
RF_OUT terminal (SMA J2).
3) Configure the network analyzer to measure S21. The
analyzer should read approximately 7dB gain at f
IN
= 2140MHz (MAX2045), 7.4dB gain at f
IN
=
1900MHz (MAX2046), and 8.4dB gain at f
IN
=
915MHz (MAX2047).
4) Changing the DC supply on the VI1 and VQ1 termi-
nals changes the magnitude of the gain. To adjust
the phase, use separate DC supplies on the VI1 and
VQ1 terminals.
Testing the Gain (Current Mode)
1) Configure the evaluation kits for current mode (see
the
Detailed Description
section).
2) Connect a current source set to 4mA to the II1 and
IQ1 terminals. Leave II2, IQ2, and all voltage-control
pins open (Figure 1).
3) Using a calibrated network analyzer, connect port 1
to the RF_IN terminal (SMA J1) and port 2 to the
RF_OUT terminal (SMA J2).
Bias Resistor
The bias resistor value (280Ω) was optimized during
characterization at the factory. This value should not be
adjusted. If the 280Ω (±1%) resistor is not readily avail-
able, substitute a standard 280Ω (±5%) resistor.
On-Chip Reference Voltage
An on-chip, 2.5V reference voltage is provided for sin-
gle-ended control mode. REFOUT is connected,
through R3 and R5, to VI2 and VQ2 to provide a stable
reference voltage. The equivalent output resistance of
the REFOUT pin is approximately 80Ω. REFOUT is
capable of sourcing 1mA of current with <10mV drop
in voltage.
Capacitors
Ceramic capacitors C16 and C17 provide bypass on
the supply. Place C16 as close to the part as possible
for high-frequency bypassing. C4–C11 are bypass
capacitors for the control inputs. C1 and C14 are DC-
blocking capacitors for the on-board baluns. DC-block-
ing capacitors prevent DC current from flowing into the
transformers and can be used as part of the matching
circuit. Capacitors C13 and C15 are used to provide an
RF ground for transformer T2. Capacitor C12 is used to
bypass the 2.5V reference in case the reference is
used. As the differential RF outputs are relatively high
_______________________________________________________________________________________
3
MAX2045/MAX2046/MAX2047 Evaluation Kits
Evaluate: MAX2045/MAX2046/MAX2047
impedance, they are more susceptible to component
parasitics. It is often good practice to relieve the
ground plane directly underneath large components to
reduce associated shunt-C parasitics.
er and of the same length to ensure signal balance. The
PC board layout should provide a large ground pad
under the device for proper RF grounding and thermal
performance. This pad should be connected to the
ground plane of the board by using multiple vias. To
minimize inductance, route the ground pins of the
device to the large ground pad. Solder the exposed pad
on the bottom of the device package to the PC board
exposed pad (refer to the MAX2045/MAX2046/
MAX2047 data sheet).
The MAX2045/MAX2046/MAX2047 EV kits can be used
as a reference for board layout. Gerber files are avail-
able upon request at www.maxim-ic.com.
Layout
The EV kit’s PC board can serve as a guide for laying
out a board using the MAX2045/MAX2046/MAX2047.
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 all differential ports, keep the differential lines togeth-
J1
RF_IN
C1
L1
T1
C2
C3
RFIN2
RFIN1
GND
GND
GND
GND
GND
GND
26
25
31
30
29
28
J3
1
2
R2
OPEN
3
C5
C4
VI2
2
CONTROL
AMPLIFIER I
90°
PHASE
SHIFTER
VI1
1
24
32
27
GND
GND
23
RBIAS
GND
21
U1
VQ1
R4
OPEN
C6
VQ2
C7
II1
C8
5
4
3
22
MAX2045
MAX2046
MAX2047
CONTROL
AMPLIFIER Q
VECTOR
MULTIPLIER
R1
280Ω
GND
20
GND
II2
C9
IQ1
C10
IQ2
C11
6
2.5V
REFERENCE
OUTPUT
STAGE
19
V
CC
V
CC
C16
17
V
CC
C17
7
18
8
10
11
12
13
14
VREF
R5
R6
OPEN 0Ω
R3
0Ω
C12
V
CC
RF_OUT
REFOUT
RFOUT1
RFOUT2
GND
GND
15
GND
5V
19
20
J2 C14
L2
C15
C13
GND
GND
T2
Figure 1. MAX2045/MAX2046/MAX2047 EV Kit Schematic
4
_______________________________________________________________________________________
16
9
NOTE:
PLEASE SEE THE PART-SPECIFIC
COMPONENT LIST FOR COMPONENT VALUES.
MAX2045/MAX2046/MAX2047 Evaluation Kits
Evaluate: MAX2045/MAX2046/MAX2047
1.0"
Figure 2. MAX2045 EV Kit Component Placement Guide—Top
Silkscreen
1.0"
Figure 3. MAX2045 EV Kit Component Placement Guide—
Bottom Silkscreen
1.0"
Figure 4. MAX2045 EV Kit PC Board Layout—Primary
Component Side
1.0"
Figure 5. MAX2045 EV Kit PC Board Layout —Ground Layer
(Layer 2)
5
_______________________________________________________________________________________
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
