Page 1
MAX2112 Evaluation Kit
Evaluates: MAX2112
General Description
The MAX2112 evaluation kit (EV kit) simplies the testing and evaluation of the IC direct-conversion tuner. The
evaluation kit is fully assembled and tested at the factory.
Standard 50Ω SMA and BNC connectors are included on
the EV kit for the inputs and outputs to allow quick and
easy evaluation on the test bench.
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 component list for the kit, and artwork
for each layer of the PCB.
Component List
DESIGNATION QTY DESCRIPTION
Not installed, 3-pin (1 x 3) inline
ADDR 0
BB_I_O/P,
BB_Q_O/P
BB_IN, BB_IP,
BB_QN, BB_QP,
CP_OUT,
J12, J13, J17,
REF_O/P, VGC
C1–C6, C9 7
C7, C13, C19,
C20, C75
C8, C12,
C25–C30
header, 0.01in centers
Sullins PEC36SAAN
50Ω BNC PC mounts
2
Amphenol 31-5329-52RFX
PC mini red test points
10
Keystone 5000
1000pF ±10% ceramic capacitors
(0603)
Murata GRM188R71H102K
0.1µF ±10% ceramic capacitors
5
(0603)
Murata GRM188R71C104K
0 Not installed, capacitors
Features
● Easy Evaluation of the MAX2112
● 50Ω RF Input SMA Connector
● 50Ω Baseband Output BNC Connector
● Single 3.3V ±5% Supply
● I2C 2-Wire Serial Interface
● All Critical Peripheral Components Included
● Fully Assembled and Tested
● PC Control Software
(available at www.maximintegrated.com/evkitsoft-
ware)
Ordering Information
PART TYPE
MAX2112EVKIT+ EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
DESIGNATION QTY DESCRIPTION
0.047µF ±10% ceramic capacitors
C10, C11 2
C14 1
C15 1
C16 1
C17, C18 2
C22 1 43.2Ω ±1% resistor (0603)*
C23, C24,
C71–C73
(0603)
Murata GRM188R71C473K
100pF ±5% ceramic capacitor
(0603)
Murata GRM1885C1H101J
0.033µF ±10% ceramic capacitor
(0603)
Murata GRM188R71E333K
2200pF ±5% ceramic capacitor
(0603)
Murata GRM188R71H222J
10µF ±10% tantalum capacitors
(C Case)
AVX TAJC016K016
330pF ±5% ceramic capacitors
5
(0603)
Murata GRM1885C1H331J
19-2071; Rev 2; 11/14
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MAX2112 Evaluation Kit
Component List (continued)
DESIGNATION QTY DESCRIPTION
J6 1
JP_VCC,
VCC_BB,
VCC_DIG,
VCC_LO,
VCC_RF1,
VCC_RF2,
VCC_SYN,
VCC_VCO
L1 1
R2, R12,
R18–R20, R22,
R25, R27–R33
R3, R7,
R15–R17, R21
R4, R13, R24 3 1kΩ ±5% resistors (0603)*
R5 1 820Ω ±5% resistor (0603)*
R6 1 390Ω ±5% resistor (0603)*
R8 1 86.6Ω ±1% resistor (0603)*
R9–R11, R41,
R42
R14, R43 2 5.1kΩ ±5% resistors (0603)*
R23, R26 2
R46, R47 2 2.7kΩ ±5% resistors (0603)*
DB25 right-angle male connector
AMP 5747238-4
Not installed, 2-pin (1 x 2) inline
0
headers, 0.01in centers
Sullins PEC36SAAN
33pF ±5% capacitor (0603)
Murata GRM1885C1H330J
0 Not installed, resistors
6 0Ω ±5% resistors (0603)*
5 100Ω ±1% resistors (0603)*
0.1µF ±10% ceramic capacitors
(0603)
Murata GRM188R71C104K
Evaluates: MAX2112
DESIGNATION QTY DESCRIPTION
Not installed, SMA edge-mount
REF_INPUT 0
RF_INPUT 1
U1 1
U2, U4 0
U3 1
U5 0
Y1 1
— 0
— 1
*Use lead-free parts only.
**EP = Exposed pad.
connector, round contact
Emerson 142-0701-801
SMA edge-mount connector,
round contact
Emerson 142-0701-801
DVBS tuner (28 TQFN-EP**)
Maxim MAX2112ETI+
Not installed, single-supply op amps
with R2R outputs
Maxim MAX4453ESA
74LV07A hex buffer/driver OC
TI SN74LV07ADR
Not installed, open I/O comparator
Maxim MAX985
27MHz crystal
Citizen America 300-8571-1-ND
Digi-Key HCM49-27.000MABJ-UT
Not installed, shunts (JP_VCC,
VCC_BB, VCC_DIG, VCC_LO,
VCC_RF1, VCC_RF2, VCC_SYN,
VCC_VCO)
Shorting jumpers, 2 position
Sullins SSC02SYAN
PCB: MAX2112/20 EVALUATION
KIT+
Component Suppliers
SUPPLIER WEBSITE
AMP/Tyco Electronics www.tycoelectronics.com
Amphenol RF
AVX Corp. www.avxcorp.com
Digi-Key Corp. www.digikey.com
Emerson Network Power www.emersonnetworkpower.com
Keystone Electronics Corp. www.keyelco.com
Maxim Integrated Products, Inc. www.maxim-ic.com
Murata Americas www.murataamericas.com
Sullins Electronics Corp. www.sullinselectronics.com
Texas instruments www.ti.com
Note: Indicate that you are using the MAX2112 when contacting these component suppliers.
www.maximintegrated.com
www.amphenolrf.co
m
Maxim Integrated
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Page 3
MAX2112 Evaluation Kit
Evaluates: MAX2112
Quick Start
Test Equipment Required
● MAX2112 EV kit
● Dual-output power supply capable of supplying up to
3.3V at > 160mA for VCC and 3V at > 50μA for VGC
gain control voltage
● RF signal generator capable of delivering at least
0dBm of output power at frequencies up to 2.175GHz
● RF spectrum analyzer capable of covering the
operating frequency range of the device
● PC laptop or tablet with Microsoft Windows XP®,
Windows® 7, 8 OS and a USB port
● USB-A male to USB-B male cable
● US keyboard
● Multichannel digital oscilloscope (optional)
● Network analyzer to measure return loss (optional)
● Ammeter to measure supply current (optional)
Procedure
The EV kit is fully assembled and factory tested. Follow
the instructions in the Connections and Setup section for
proper device evaluation.
Measurement Considerations
The EV kit includes on-board matching circuitry at the
MAX2112 RF input to convert the 50Ω source to a 75Ω
input. Note that the input power to the device must be
adjusted to account for the -6dB power loss of the match-
ing resistor network.
Connections and Setup
This section provides a step-by-step guide to testing the
basic functionality of the EV kit in UHF mode. Caution:
Do not turn on DC power or RF signal generators until
all connections are completed.
1) Verify that all jumpers are in place.
2) With its output disabled, connect the DC power sup-
ply to VGC set to 0.5V (maximum gain).
3) With its output disabled, set the DC power supply to
3.3V. Connect the power supply to the VCC (through
an ammeter if desired) and GND terminals on the EV
kit. If available, set the current limit to 200mA.
4) With its output disabled, set the RF signal generator
to a 955MHz frequency at -69dBm to account for the
6dB resistive pad loss. When measuring noise gure,
this 6dB must also be accounted for by subtracting
6dB from the measured noise gure, unless the pad
has been removed.
5) Connect the output of the RF signal generator to the
SMA connector labeled RF _INPUT on the evalua-
tion board.
6) Connect the PC to the INTF3000 interface board
using the USB-A male to USB-B male cable. On
INTF3000, place a jumper between pins 1-2 on JU1
(VBUS Pos). Connect the 25-pin connector of the
INTF3000 (J4) directly to the 25-pin connector on the
EV kit (J6).
7) Turn on the 3.3V VCC power supply, followed by the
3V gain-control power supply. The supply current
from the 3.3V VCC supply should read approximately
100mA, and the supply current from the 3V VGC
should read approximately 50μA. Be sure to adjust
the power supply to account for any voltage drop
across the ammeter.
8) Install and run the IC control software. Software
is available for download on the Maxim website at
www.maximintegrated.com/evkitsoftware.
9) Load the default register settings from the control
software by clicking Edit: Load Defaults. Set ICP =
1 and BBG[3:0] = 1011.
10) Connect the output to a spectrum analyzer or an
oscilloscope.
11) Enable the RF signal generator’s output.
12) Activate and set the power level of the RF generator
to achieve 1V
outputs.
13) Check the I/Q outputs.
14) Observe the baseband output at 5MHz with 1V
at the baseband BNC connector
P-P
P-P
.
Windows and Windows XP are registered trademarks and
registered service marks of Microsoft Corporation.
www.maximintegrated.com
Maxim Integrated
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Page 4
MAX2112 Evaluation Kit
Evaluates: MAX2112
Layout Considerations
The EV kit can serve as a guide for PCB layout. Keep RF
signal lines as short as possible to minimize losses and
radiation. Use controlled impedance on all high-frequency
traces. The exposed paddle must be soldered evenly to
the board’s ground plane for proper operation. Use abundant vias beneath the exposed paddle for maximum heat
dissipation. Use abundant ground vias between RF traces
to minimize undesired coupling.
To minimize coupling between different sections of the
IC, the ideal power-supply layout is a star configuration,
which has a large decoupling capacitor at the central
VCC node. The VCC traces branch out from this node,
with each trace going to separate VCC pins of the IC.
Each VCC pin must have a bypass capacitor with a low
impedance to ground at the frequency of interest. Do not
share ground vias among multiple connections to the
PCB ground plane.
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Page 5
MAX2112 Evaluation Kit
Evaluates: MAX2112
Figure 1. MAX2112 EV Kit Schematic
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Maxim Integrated
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Page 6
MAX2112 Evaluation Kit
Evaluates: MAX2112
Figure 2. MAX2112 EV Kit PCB Layout—Component Placement Guide
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Page 7
MAX2112 Evaluation Kit
Evaluates: MAX2112
Figure 3. MAX2112 EV Kit PCB Layout—Top
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Page 8
MAX2112 Evaluation Kit
Evaluates: MAX2112
Figure 4. MAX2112 EV Kit PCB Layout—Bottom
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Page 9
MAX2112 Evaluation Kit
Evaluates: MAX2112
Figure 5. MAX2112 EV Kit PCB Layout—Top Soldermask
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Page 10
MAX2112 Evaluation Kit
Evaluates: MAX2112
Figure 6. MAX2112 EV Kit PCB Layout—Bottom Soldermask
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Page 11
MAX2112 Evaluation Kit
Revision History
Evaluates: MAX2112
REVISION
NUMBER
0 11/07 Initial release —
1 5/10 Updated L1 in the Component List and Figure 1 2, 5
2 11/14 Updated Quick Start section 3
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or 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 specications without notice at any time.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
©
2014 Maxim Integrated Products, Inc.
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Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
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MAX2112EVKIT+
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