MAX3521EVKIT [MAXIM]
All Critical Peripheral Components Included;
| 型号： | MAX3521EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | All Critical Peripheral Components Included |
| 文件： | 总11页 (文件大小：422K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Evaluates: MAX3521
MAX3521 Evaluation Kit
General Description
Features
● Easy Evaluation of the MAX3521
The MAX3521 evaluation kit (EV kit) simplifies the testing
and evaluation of the MAX3521 DOCSIS 3.0 upstream
amplifier. The EV kit is fully assembled and tested at the
factory. Standard 50Ω SMA connectors are included on
the EV kit for the inputs and outputs to allow quick and
easy evaluation on the test bench.
● 50Ω SMA Connectors
● All Critical Peripheral Components Included
● Proven PCB Layout
● Fully Assembled and Tested
This document provides a list of equipment required to
evaluate the device, a straightforward test procedure to
verify functionality, a description of the EV kit circuit, the
circuit schematic, a list of components for the EV kit, and
artwork for each layer of the PCB.
● PC Control Software
(Available at www.maximintegrated.com)
Ordering Information appears at end of data sheet.
Component List
DESIGNATION QTY
DESCRIPTION
Ferrite beads (0805)
DESIGNATION QTY
DESCRIPTION
PC mini red test point
Keystone 5000
B1, B2
B3
2
1
JP3 (+5V)
JP4 (GND)
1
1
Murata BLM21AG601SN1
Ferrite bead 1206,
Murata BLM31PG121SN1
PC mini black test point
Keystone 5001
R1
R2, R6
R3
1
2
1
1
2
100kΩ ±5% resistor (0603)
100Ω ±1% resistors (0603)
43.2Ω ±1% resistor (1206)
86.6Ω ±1% resistor (1206)
37.4Ω ±1% resistors (0603)
0.01µF ±10% ceramic capacitors
(0603)
Murata GRM188R71H103K
C1–C4, C8
C5, C9
C6
5
2
1
1
R4
5.6pF ±0.1pF ceramic capacitors
(0603)
Murata GRM1885C1H5R6B
R5, R7
SMA end-launch jack receptacles
Emerson (Johnson) 142-0701-801
RFIN, RFOUT
2
1
1
10µF ±10% ceramic capacitor
(0805)
Murata GRM21BR61A106K
1:4 transformer
TOKO 617PT-1664
T1
T2
1:2 transformer
TOKO 617PT-2270
0.1µF ±10% ceramic capacitor
(0402)
C7
Murata GRM155R71A104K
DOCSIS 3.0 upstream amplifier
(20 TQFN-EP*)
Maxim MAX3521ETP+
U1
1
1
10pF ±5% ceramic capacitors
(0603)
Murata GRM1885C1H100J
C10, C11
JP2
2
1
PCB: MAX3521 EVALUATION
KIT#
—
20-pin (2 x 10) dual inline header
Sullins PEC36DAAN
*EP = Exposed pad.
19-6774; Rev 1; 6/16
Evaluates: MAX3521
MAX3521 Evaluation Kit
Component Suppliers
SUPPLIER
Emerson Network Power
Keystone Electronics Corp.
Murata Americas
PHONE
WEBSITE
507-833-8822
800-221-5510
800-241-6574
760-545-6700
847-297-0070
www.emersonnetworkpower.com
www.keyelco.com
www.murataamericas.com
www.sullinselectronics.com
www.tokoam.com
Sullins Electronics Corp.
TOKO America, Inc.
Note: Indicate that you are using the MAX3521 when contacting these component suppliers.
3) With its output disabled, set the DC power supply to
Quick Start
+5V. Connect the power supply to the +5V (through
an ammeter if desired) and GND terminals on the EV
kit. If available, set the current limit to 650mA.
Test Equipment Required
●
●
●
Power supply capable of supplying at least 750mA
at +5V
4) With its output disabled, set the other DC power-
supply voltage to +3.3V. Connect the power supply
to the VPULL and GND terminals on the INTF3000+
interface board.
Power supply capable of supplying at least 5mA at
+3.3V (sets logic level on INTF3000+ interface board)
RF signal generator capable of delivering at least
-10dBm of output power at 40MHz frequency
(e.g., HP8482A or equivalent)
5) With its output disabled, set the RF signal generator
to a 40MHz frequency and a -20dBm power level.
Connect the output of the RF signal generator to the
SMA connector labeled RFIN on the evaluation board.
●
RF spectrum analyzer capable of covering the
operating frequency range of the device
6) Install and run the MAX3521 EV kit software, available
●
●
●
●
●
●
Windows® PC with a spare USB port
USB cables
for download HERE
.
7) Turn on the +3.3V power supply, followed by the
+5V power supply. The supply current from the +5V
supply should read approximately 5mA. Be sure to
adjust the power supply to account for any voltage
drop across the ammeter.
50Ω SMA cables
(Optional) Multichannel digital oscilloscope
(Optional) Network analyzer to measure return loss
(Optional) Ammeter to measure supply current
8) Load the default register settings from the control
Connections and Setup
software by clicking on the Defaults button.
This section provides a step-by-step quide to testing the
basic functionality of the EV kit. Caution: Do not turn on
DC power or RF signal generators until all connections
are completed.
9) Connect the SMA connector labeled RFOUT on the
evaluation board to a spectrum analyzer or to an
oscilloscope. Set TXEN = 1. The supply current from
the +5V supply should read approximately 475mA.
1) Verify that the shunt across jumper JU1 on the
INTF3000+ interface board has been removed.
10) Enable the RF signal generator’s output. Check the
output level on the spectrum analyzer or oscilloscope.
Expected power level is about +12.3dBm under
default setting
2) Connect 20-pin header J1 on the INTF3000+ interface
board to 20-pin header JP2 on the EV kit using the
supplied ribbon cable. Note: Pin 1 of the interface
cable corresponds to the red wire. Pin 1 is designated
in the silkscreen on each of the PCBs.
11) Set the gain code using the control software.
Check the output level on the spectrum analyzer or
oscilloscope.
Windows is a registered trademark and registered service mark
of Microsoft Corporation.
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Layout Considerations
Detailed Description
The EV kit can serve as a guide for PCB layout. Keep
RF signal lines as short as possible to minimize losses
and radiation. To minimize second-order distortion, traces
in the balanced input and output circuitry should be
as symmetric as possible. The exposed pad must be
soldered evenly to the board’s ground plane for proper
operation. Use abundant vias beneath the exposed pad
for maximum heat dissipation. Use abundant ground vias
between RF traces to minimize undesired coupling.
Gain Calculations
The 1:4 impedance ratio transformer (T1) on the EV kit
converts the unbalanced 50Ω impedance of the signal
generator to a balanced 200Ω, matching the input of the
device. T1 is included to assist in evaluation of the device
using standard 50Ω lab equipment. It is not required for
most applications.
A 1:4 impedance ratio corresponds to a 1:2 voltage ratio,
or 6dB voltage gain. The power loss of T1, which must
be included, is approximately 0.3dB across the operating
frequency range of the device, giving a total voltage gain
due to T1 of 5.7dB.
To minimize coupling between different sections of the
device, the ideal power-supply layout is a star configuration,
which has a large decoupling capacitor at the central
V
node. The V
traces branch out from this node,
CC
CC
A minimum loss pad (MLP) on the output of T2 trans-
forms the 75Ω output impedance of the device to 50Ω
test-equipment impedance, with a voltage loss of 7.4dB.
Because the 1:2 impedance ratio output transformer (T2)
is required in the application, we do not include the loss in
this transformer in the voltage-gain calculation.
with each trace going to separate V
pins of the device.
CC
Each V
pin must have a bypass capacitor with low
CC
impedance to ground at the frequency of interest. Do
not share ground vias among multiple connections to the
PCB ground plane.
To calculate the voltage gain of the device from 50Ω
power measurements at RFIN and RFOUT on the EV kit:
A = P (dBm) + 7.4dB (MLP) - [P (dBm) + 5.7dB (T1)]
V OUT IN
= P (dBm) - PIN(dBm) + 1.7dB
OUT
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Figure 1. MAX3521 EV Kit Schematic
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Figure 2. MAX3521 EV Kit Component Placement Guide
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Figure 3. MAX3521 EV Kit PCB Layout—Primary Component Side
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Figure 4. MAX3521 EV Kit PCB Layout—Inner Layer 2
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Figure 5. MAX3521 EV Kit PCB Layout—Inner Layer 3
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Figure 6. MAX3521 EV Kit PCB Layout—Secondary Component Side
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Ordering Information
PART
TYPE
EV Kit
MAX3521EVKIT#
#Denotes RoHS compliant.
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Evaluates: MAX3521
MAX3521 Evaluation Kit
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
DESCRIPTION
0
1
8/13
6/16
Initial release
—
Data sheet improvements
2, 3
For information on other Maxim Integrated products, visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2016 Maxim Integrated Products, Inc.
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