MAX7049 Evaluation Kits
Evaluate: MAX7049
General Description
The MAX7049 evaluation kits (EV kits) provide a proven
design to evaluate the MAX7049 frequency-programmable ASK/FSK transmitter in a 28-pin TQFN package
with an exposed pad. The EV kits use Windows XP®-,
Windows Vista®-, and Windows® 7-compatible software
to provide a simple graphical user interface (GUI). The
EV kits enable testing of the device’s RF performance
and require no additional support circuitry. The RF output uses a 50I matching network and an SMA connector
for convenient connection to test equipment. The EV kit
PCBs come with a MAX7049ATI+ installed.
Features
S Windows XP-, Windows Vista-, and Windows
7-Compatible Software
S USB Powered
S Proven PCB Layout
S Proven Components List
S Adjustable Programmable Frequency
S Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX7049EVKIT-433#
EV Kit (433MHz)
MAX7049EVKIT-868#
EV Kit (868MHz)
MAX7049EVKIT-915#
EV Kit (915MHz)
#Denotes RoHS compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
BATT-2032
0
Not installed, battery holder and
contact solution
BATT-AAA
0
Not installed, plastic battery
holder
C1, C9, C12,
C16, C22, C25,
C42, C46, C49
33pF Q5%, 50V C0G ceramic
Diagrams
9 Functional
capacitors (0402)
Murata GRM1535C1H330J
C2, C10, C13,
C17, C23, C26,
C43, C47, C50
9
0.01FF Q10%, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E103K
C3, C11, C14,
C18, C24, C27,
C44, C48, C51
9
1FF Q10%, 6.3V X7R ceramic
capacitors (0603)
Murata GRM188R70J105K
C15
1
10FF Q10%, 6.3V X7R ceramic
capacitor (0805)
Murata GRM21BR70J106K
1
150pF Q5%, 50V C0G ceramic
capacitor (0402)
Murata GRM1555C1H151J
C19
DESIGNATION
QTY
DESCRIPTION
C21
1
68pF Q5%, 50V C0G ceramic
capacitor (0402)
Murata GRM1555C1H680J
C33, C34
2
1.5pF Q0.25pF, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H1R5C
C38, C40, C41
0
Not installed, ceramic capacitors
(0402)
433MHz
6.2pF Q0.5pF ceramic capacitor
(0402)
Murata GRM1555C1H6R2DA01
C52*
1
868MHz
2.7pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H2R7CA01
915MHz
3.6pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H3R6CA01
1500pF Q10%, 50V X7R ceramic
C20, C31, C32
3
capacitors (0402)
Pin Configurations appear atMurata
end ofGRM155R71H152K
data sheet.
Functional Diagrams continued at end of data sheet.
UCSP
is a trademark
of Maxim
Integrated
Products,
Inc.
Windows,
Windows XP,
and Windows
Vista
are registered
trademarks and registered service marks of Microsoft Corporation.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6365; Rev 0; 7/12
MAX7049 Evaluation Kits
Evaluate: MAX7049
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
433MHz
Not installed, ceramic capacitor
(0402)
C53*
0
868MHz
Not installed, ceramic capacitor
(0402)
433MHz
6.2pF Q0.5pF ceramic capacitor
(0402)
Murata GRM1555C1H6R2DA01
C57*
1
915MHz
Not installed, ceramic capacitor
(0402)
0
868MHz
Not installed, ceramic capacitor
(0402)
915MHz
Not installed, ceramic capacitor
(0402)
1
CX*
433MHz
12pF Q5% ceramic capacitor
(0402)
Murata GRM1555C1H120JA01
C55*
1
868MHz
5.6pF Q0.5pF ceramic capacitor
(0402)
Murata GRM1555C1H5R6DA01
915MHz
2.7pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H2R7CA01
433MHz
6.2pF Q0.5pF ceramic capacitor
(0402)
Murata GRM1555C1H6R2DA01
C56*
1
868MHz
3.3pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H3R3CA01
915MHz
2.7pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H2R7CA01
2
868MHz
2.7pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H2R7CA01
915MHz
3.0pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H3R0CA01
433MHz
Not installed, ceramic capacitor
(0402)
C54*
DESCRIPTION
433MHz
5.6pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H3R0CA01
868MHz
3.3pF Q0.25pF ceramic capacitor
(0402)
Murata GRM1555C1H3R3CA01
0
915MHz
Not installed, ceramic capacitor
(0402)
C100, C102,
C104, C106,
C109–C113,
C117, C122,
C125–C132
19
0.1FF Q10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
C101, C103,
C105, C107
4
10FF Q10%, 6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J106M
C114, C115
2
22pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
C116
1
33000pF Q10%, 16V X7R
ceramic capacitor (0603)
Murata GRM188R71C333K
C118, C119
2
10pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
C120, C121
2
100pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H101J
Maxim Integrated
MAX7049 Evaluation Kits
Evaluate: MAX7049
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
433MHz
15nH Q2% inductor (0603)
Murata LQW18AN15NG00J
CS, DIN, EN,
GPO1, GPO2,
HOP, LSHDN,
SCLK, DI, SDO
10
Red miniature test points
D100–D105
6
Yellow LEDs (1206)
D106–D111
6
Green LEDs (1206)
868MHz
5.6nH Q2% inductor (0603)
Murata LQW18AN5N6C00J
FB1
1
1kI ferrite bead
Murata BLM15AG102SN1
915MHz
0nH inductor (0603)
GND, TP129,
TP131, TP132
4
Black multipurpose test points
GND-A–GND-F,
P1.7, SPKEN,
TP4, VADJ,
VDUT-A,
VDUT-B, VEXT,
3V3
14
J100
1
8-pin (2 x 4) header
J101
1
6-pin (2 x 3) header
0
Not installed, 40-pin (2 x 20)
headers
J102, J103
JU1, JU3–JU7,
JU12–JU15,
JU100,
JU101–JU108
19
JU9, JU10,
JU109–JU128
22
1-pin headers
3-pin headers
2-pin headers
433MHz
470nH Q2% inductor (0603)
Murata LQW18ANR47G00J
L1
1
868MHz
270nH Q2% inductor (0603)
Murata LQW18ANR27G00J
915MHz
270nH Q2% inductor (0603)
Murata LQW18ANR27G00J
433MHz
33nH Q2% inductor (0603)
Murata LQW18AN33NG00J
L2*
1
868MHz
12nH Q2% inductor (0603)
Murata LQW18AN12NG00J
915MHz
10nH Q2% inductor (0603)
Murata LQW18AN10NG00J
Maxim Integrated
L3*
1
433MHz
16nH Q2% inductor (0603)
Murata LQW18AN16NG00J
L4*
1
868MHz
5.6nH Q2% inductor (0603)
Murata LQW18AN5N6C00J
915MHz
8.7nH Q0.5nH inductor (0603)
Murata LQW18AN8N7D00J
P100
1
USB type-B right-angle female
receptacle
Q100
1
Dual n-channel FET (6 SuperSOT)
Fairchild FDC6301N
R1
1
5.11I Q1% resistor (0603)
R2
1
56kI Q1% resistor (0603)
R4–R6, R9,
R10, R16, R17
7
10I Q1% resistors (0603)
R7
1
2kI Q0.5% resistor (0603)
Susumu RR0816P-202-D
R8
1
1.5kI Q1% resistor (0603)
R12, RB
0
Not installed, resistors (0603)
R13–R15
3
1kI Q1% resistors (0603)
R18, R125,
R126, RA
4
0I Q5% resistors (0603)
R100
1
50kI Q10% potentiometer
Vishay TS63Y503k
R101
1
27.4kI Q1% resistor (0603)
R102
R103,
R105–R107,
R127–R130,
R133, R134
R104
1
39.2kI Q1% resistor (0603)
10
100kI Q1% resistors (0603)
1
59kI Q1% resistor (0603)
R108
1
158kI Q1% resistor (0603)
3
MAX7049 Evaluation Kits
Evaluate: MAX7049
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
R109, R111,
R113, R115,
R116, R131,
R132, R135,
R136
9
R110
1
330I Q5% resistor (0603)
R112
1
75I Q5% resistor (0603)
DESIGNATION
QTY
DESCRIPTION
U100–U103
4
Low noise, LDO linear regulators
(5 SC70)
Maxim MAX8512EXK+
U104
1
UART-to-USB converter
(32 TQFP)
U105
0
Not installed, 93C46 3-wire
EEPROM (8 SO)
U106
1
32-bit microcontroller
(68 QFN-EP**)
Maxim MAXQ2000-RAX+
U107–U110
4
8-channel level translators
(20 TSSOP)
Maxim MAX3001EEUP+
Y1
1
16MHz crystal, 10pF load C
Y100
1
6MHz crystal (HCM49)
Hong Kong X’tals
SSL600000018FAF
150I Q5% resistors (0603)
R114
1
43I Q5% resistor (0603)
R117
1
10kI Q5% resistor (0603)
R118
1
2.2kI Q5% resistor (0603)
R119
1
1.5kI Q5% resistor (0603)
R120, R121
2
27I Q5% resistors (0603)
R122
1
470I Q1% resistor (0603)
R137, R138,
R141–R147,
R149
10
100I Q5% resistors (0603)
RF, XTAL
2
SMA female vertical connectors
S100, S101
2
Momentary pushbutton switches
Y101
0
Not installed, 32.768kHz crystal
S102
1
Quad SPST normally open DIP
switch
Y102
1
TP1, TP3,
TP5–TP8,
TP12–TP14,
TP127,
VANALOG
16MHz crystal
Hong Kong X’tals
SSM1600000E18FAF
11
Red multipurpose test points
—
1
USB high-speed A-to-B cables,
6ft
—
41
Shunts
—
1
PCB: MAX7049 EVALUATION
KIT
U1
1
288MHz to 928MHz frequencyprogrammable ASK/FSK
transmitter (28 TQFN-EP**)
Maxim MAX7049ATI+
*Indicates matching component.
**EP = Exposed pad.
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Fairchild Semiconductor
888-522-5372
www.fairchildsemi.com
Hong Kong X’tals Ltd.
852-35112388
www.hongkongcrystal.com
Murata Electronics North America, Inc.
770-436-1300
www.murata-northamerica.com
NDK America (Nihon Dempa Kogyo Co., Ltd.)
815-544-7900
www.ndk.com/en
Susumu International USA
203-328-0307
www.susumu-usa.com
Vishay
402-563-6866
www.vishay.com
Note: Indicate that you are using the MAX7049 when contacting these component suppliers.
4
Maxim Integrated
MAX7049 Evaluation Kits
Evaluate: MAX7049
MAX7049 EV Kit Files
FILE
DESCRIPTION
INSTALL.EXE
Installs the EV kit files on your
computer
MAX7049.EXE
Application program
CDM20600.EXE
Installs the USB device driver
UNINSTALL.EXE
Uninstalls the EV kit software
USB_Driver_Help_200.PDF
USB driver installation help file
Quick Start
Required Equipment
•
MAX7049 EV kit
•
Windows XP, Windows Vista, or Windows 7 PC with
a spare USB port
•
Spectrum analyzer
Note: In the following sections, software-related
items are identified by bolding. Text in bold refers
to items directly from the EV kit software. Text in
bold and underlined refers to items from the Windows
operating system.
Procedure
Each EV kit is fully assembled and tested. Follow the
steps below to verify board operation.
1) Visit www.maximintegrated.com/evkitsoftware to
down-load the latest version of the EV kit software,
7049Rxx.ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP file.
2) Install the EV kit software and USB driver on your
computer by running the INSTALL.EXE program
inside the temporary folder. The program files are
copied to your PC and icons are created in the
Windows Start | Programs menu. During software
installation, some versions of Windows may show
a warning message indicating that this software
is from an unknown publisher. This is not an error
condition and it is safe to proceed with installation.
Administrator privileges are required to install the
USB device driver on Windows.
3) Verify that all jumpers are in their default positions,
as shown in Table 1.
4) Connect the USB cable from the PC to the EV
kit board. A Windows message appears when
connecting the EV kit board to the PC for the
first time. Each version of Windows has a slightly
different message. If you see a Windows message
Maxim Integrated
stating ready to use, then proceed to the next step.
Otherwise, open the USB_Driver_Help_200.PDF
document in the Windows Start | Programs menu to
verify that the USB driver was installed successfully.
5) Start the EV kit software by opening its icon in the
Start | Programs menu. The EV kit software main
window appears, as shown in Figure 1. The EV kit
GUI indicates if the USB hardware is connected in
the lower-left status bar.
6) Enter the frequency of the crystal that is in the EV kit
(usually 16MHz) by clicking on the Options menu
item and selecting the appropriate frequency.
7) Connect the RFOUT SMA connector to a power
meter to measure transmitted power, or to a
spectrum analyzer to see the power level and
modulation spectrum. Set the analyzer to a
frequency at or near the center frequency of the
EV kit and set the frequency span to 4MHz. For
example, for an 868MHz EV kit, set the analyzer
center frequency near 868MHz.
8) The device operates in ASK mode by default.
Set the device carrier frequency to the desired
frequency by typing the frequency in MHz in the
FTX edit box, and then pressing Enter.
9) Set the Tx power level by entering an integer
between 0 and 63 in the ASK Amplitude edit
box. Each integer represents 0.5mA of DC current in the final power amplifier (PA) stage. A
number between 37 and 44 usually produces
a transmitted power level near +13dBm, when
a +3.0V supply voltage is used. For simple
transmission with no data-pulse shaping, leave
the Pulse radio button selected in the Common
Shaping group box (the default setting).
10) Click on the MAX7049 Enable checkbox and verify
that the light is green. Verify that the TX Ready light
is also green. TX Ready turns green when the
device achieves lock.
11) Click on the TX Data checkbox and verify that the
light is green.
12)
The spectrum analyzer should display an
unmodulated carrier at 868MHz. The power level
depends on the ASK Amplitude setting entered in
Step 9.
13) To test FSK, first uncheck the MAX7049 Enable
checkbox. Click on the FSK radio button in the
Modulation group box for FSK modulation.
5
MAX7049 Evaluation Kits
Evaluate: MAX7049
14) Set the Tx power level for FSK transmission by
entering a number between 0 and 63 in the FSK
Amplitude edit box. A number between 37 and 44
usually produces a transmitted power level near
+13dBm, when a +3.0V supply voltage is used.
15) Set the PA power-up speed for a FSK transmission
by entering a number between 1 and the Tx power
setting from the previous step in the FSK Amplitude
Step edit box. The larger the number, the faster the
ramp-up speed.
16) Type the two-way frequency deviation in the FSK
FDEV (kHz) edit box to set the frequency deviation
and then press Enter. For example, an entry of 100
creates a ±50kHz deviation. The number in the FSK
FDEV (kHz) edit box may change slightly after the
number is entered because the exact deviation is
set by the frequency resolution of the synthesizer.
For example, an entry of 100 may return a reading
of 99.610895 in the edit box. For simple transmission
with no data-pulse shaping, leave the Pulse radio
button selected in the Common Shaping group box
(the default setting).
17) Click on the MAX7049 Enable checkbox and
verify that the light is green. Verify that the TX Ready
light is also green. The spectrum analyzer should
display an unmodulated carrier at the logic 0 (Space)
frequency, which is about 867.95MHz for the 100kHz
deviation example. This frequency may be off by
up to a few tens of kHz, depending on the crystal
frequency tolerance.
18) Toggle the TX Data button and observe the
frequency shifts on the spectrum analyzer. The logic
1 (Mark) frequency should be near 868.05MHz, or
100kHz higher than the logic 0 frequency.
Additional Evaluation
19) For efficiency measurements, take the shunt off of
JU115 and connect an ammeter in series.
20) Connect a power meter to the RF SMA connector.
Measure the output power and supply current.
21) The efficiency is calculated by the following
equation:
Efficiency =
10 ^ (POUT 10)
I⋅ V
Table 1. Control-Side Jumper Table (J100, JU100–JU128)
JUMPER
SHUNT
POSITION
1-2
J100
JU100
JU101
JU102
JU103
JU104
6
DESCRIPTION
VDUT (IC) powered by battery.
3-4
VDUT powered by USB. Do not use this setting for the IC.
5-6
VDUT powered by an external supply. Apply the external voltage between the VEXT and
GND_ test points.
7-8*
VDUT powered by an adjustable on-board regulator. Change the resistance of
potentiometer R100 to the required DUT supply.
1-2
Connects the external supply to the REG supply.
2-3*
Connects the USB supply to the REG supply.
1-2*
Microcontroller supply comes from the REG supply.
2-3
Microcontroller supply comes from the battery. Installation of the battery holders is
required.
1-2*
Logic microcontroller supply (VMICROL) is set to 3.3V.
2-3
Logic microcontroller supply (VMICROL) is set to VMICRO.
1-2
Core microcontroller supply (VMICRO) is set to VLO.
2-3*
Core microcontroller supply (VMICRO) is set to 2.5V.
1-2*
Selects the AAA battery holder for the VBAT supply.
2-3
Selects the 2032 battery holder for the VBAT supply.
Maxim Integrated
Evaluate: MAX7049
MAX7049 Evaluation Kits
Table 1. Control-Side Jumper Table (J100, JU100–JU128) (continued)
JUMPER
JU105
JU106
JU107
JU108
JU109
JU110
JU111–JU128
SHUNT
POSITION
DESCRIPTION
1-2
Must supply the microcontroller oscillation frequency externally.
2-3*
Connects the microcontroller oscillator to the on-board crystal.
1-2
Must supply the microcontroller oscillation frequency externally.
2-3*
Connects the microcontroller oscillator to the on-board crystal.
1-2
Must supply the RTC oscillation frequency externally.
2-3*
Connects the RTC oscillator to the on-board crystal (not installed).
1-2
Must supply the RTC oscillation frequency externally.
2-3*
Connects the RTC oscillator to the on-board crystal (not installed).
Closed
GPO2 connects to the DUT through level translators.
Open*
GPO2 does not connect to the DUT.
Closed*
Open
Closed*
GPO1 connects to the DUT through level translators.
GPO1 does not connect to the DUT.
See Table 2.
*Default position.
Table 2. Jumper Table (JU111–JU128)
JUMPER
JU111
SHUNT
POSITION
Closed*
Open
DESCRIPTION
VANALOG supply on the IC side powered by the VDUT supply on the control side.
Connection point for an ammeter, if supply current measurements are required.**
JU112
Closed*
Don’t care.
JU113
Closed*
Don’t care.
JU114
Closed*
Don’t care.
Closed
VANALOG supply on the IC side powered by the VDUT supply on the control side.
Open*
Connection point for an ammeter if supply current measurements are required.**
JU115
Closed*
Connects the GPO1 signal from the IC to the on-board microcontroller. The GPO1 signal
can be monitored on the GPO1 test point.
Open
GPO1 signal is not connected to the on-board microcontroller. The GPO1 signal can be
monitored by an external microcontroller on the GPO1 test point without interference
loading from the on-board microcontroller.
JU116
Closed*
JU117
Open
Connects the enable signal from the on-board microcontroller to the IC. The LSHDN
signal can be monitored on the LSHDN test point.
LSHDN signal is not connected to the on-board microcontroller. When using an external
enable signal, remove the jumper and apply the signal on the LSHDN test point.
JU118
Closed*
Don’t care.
JU119
Closed*
Don’t care.
Closed*
Connects the hop signal from the on-board microcontroller to the IC. The hop signal can
be monitored on the HOP test point.
Open
Hop signal is not connected to the on-board microcontroller. When using an external hop
signal, remove the jumper and apply the signal on the HOP test point.
JU120
**Note that JU111 and JU115 are redundant connections: Place an ammeter on either one while leaving the other open.
Maxim Integrated
7
MAX7049 Evaluation Kits
Evaluate: MAX7049
Table 2. Jumper Table (JU111–JU128) (continued)
JUMPER
SHUNT
POSITION
Closed*
Connects the GPO2 signal from the IC to the on-board microcontroller. The GPO2 signal
can be monitored on the GPO2 test point.
Open
GPO2 signal is not connected to the on-board microcontroller. The GPO2 signal can be
monitored by an external microcontroller on the GPO2 test point without interference
loading from the on-board microcontroller.
JU121
Closed*
JU122
Open
Closed*
JU123
Open
Connects the on-board CS signal to the IC. The CS signal can be monitored on the CS
test point.
Does not connect the on-board CS signal to the IC. When using external SPI, remove this
jumper and apply the CS signal to the CS test point.
Connects the on-board DI signal to the IC. The DI signal can be monitored on the DI test
point.
Does not connect the on-board DI signal to the IC. When using external SPI, remove this
jumper and apply the DI signal to the DI test point.
Closed*
Connects the on-board SCLK signal to the IC. The SCLK signal can be monitored on the
SCLK test point.
Open
Does not connect the on-board SCLK signal to the IC. When using external SPI, remove
this jumper and apply the SCLK signal to the SCLK test point.
Closed*
Connects the on-board enable signal (ENABLE) to the IC. ENABLE can be monitored on
the ENABLE test point.
Open
Does not connect the on-board enable signal to the IC. When using an external signal for
enable, remove this jumper and apply the ENABLE signal to the ENABLE test point.
JU124
JU125
Closed*
JU126
Open
JU127
DESCRIPTION
Closed*
Closed*
JU128
Open
Connects the on-board transmitter data signal (DATAIN) to the IC. DATAIN can be
monitored on the DATAIN test point.
Does not connect the on-board transmitter data signal to the IC. When using an
external signal for transmitter data, remove this jumper and apply the DATAIN signal to
the DATAIN test point.
Don’t care.
Connects the microcontroller to the on-board SDO signal from the IC. The SDO signal can
be monitored on the SDO test point.
Does not connect the microcontroller to the SDO signal from the IC. When using external
SPI, remove this jumper and apply the MISO input to the SDO test point.
*Default position.
Table 3. DUT-Side Jumper Table (JU1, JU3–JU7, JU9, JU10, JU12–JU15)
JUMPER
JU1
JU3
JU4
8
SHUNT
POSITION
1-2*
DESCRIPTION
Connects PAVDD to VANALOG.
2-3
External PAVDD. Must apply an external voltage on TP1 to power PAVDD.
1-2*
Connects LOVDD to VANALOG.
2-3
External LOVDD. Must apply an external voltage on TP3 to power LOVDD.
1-2*
Connects VCOVDD to VANALOG.
2-3
External VCOVDD. Must apply an external voltage on TP5 to power VCOVDD.
Maxim Integrated
MAX7049 Evaluation Kits
Evaluate: MAX7049
Table 3. DUT-Side Jumper Table (JU1, JU3–JU7, JU9, JU10, JU12–JU15) (continued)
JUMPER
JU5
JU6
JU7
JU9
JU10
JU12
JU13
JU14
JU15
SHUNT
POSITION
DESCRIPTION
1-2*
Connects CPVDD to VANALOG.
2-3
External CPVDD. Must apply an external voltage on TP6 to power CPVDD.
1-2*
Connects PLLVDD to VANALOG.
2-3
External PLLVDD. Must apply an external voltage on TP7 to power PLLVDD.
1-2*
Connects XOVDD to VANALOG.
2-3
External XOVDD. Must apply an external voltage on TP8 to power XOVDD.
Closed*
Open
Closed*
Open
1-2*
Connects the IC ENABLE pin to the ENABLE test point.
Connects the IC ENABLE pin to a pullup resistor.
Connects the IC DATAIN pin to the DATAIN test point.
Connects the IC DATAIN pin to a pullup resistor.
Connects DVDD to VANALOG.
2-3
External DVDD. Must apply an external voltage on TP12 to power DVDD.
1-2*
Connects AVDD to VANALOG.
2-3
External AVDD. Must apply an external voltage on TP13 to power XOVDD.
1-2*
Connects PAOUT to VANALOG.
2-3
External PAOUT. Must apply an external voltage on TP14 to power PAOUT.
1-2
Connects the IC LSHDN input high.
2-3*
Connects the IC LSHDN input low.
*Default position.
Layout Issues
Detailed Description of Software
A properly designed PCB is essential for any RF/microwave circuit. Keep high-frequency input and output lines
as short as possible to minimize losses and radiation. At
high frequencies, trace lengths that are on the order of
λ/10 or longer can act as antennas.
The main window of the MAX7049 EV kit is shown in
Figure 1.
Both parasitic inductance and capacitance are
influential on circuit layouts and are best avoided by
using short trace lengths. Generally, a 10 mil wide
PCB trace, 0.0625in above a ground plane, with FR4
dielectric has about 19nH/in of inductance and about
1pF/in of capacitance. In the matching network, where
the inductor is on the order of 12nH and a capacitor is on
the order of 5pF, the proximity of the circuit to the IC has
a strong influence on the effective component values.
To reduce the parasitic inductance, use a solid ground
or power plane below the signal traces. Also, use lowinductance connections to ground on all GND pins,
and place decoupling capacitors close to all VDD
connections. Do not share GND vias on decoupling
capacitors: Give each capacitor its own via.
Maxim Integrated
The EV kits use Windows XP-, Windows Vista-, and
Windows 7-compatible software to provide a simple
GUI to demonstrate the MAX7049 IC. Each EV kit GUI
has a tab for the transmitter configuration, for the GPO
configuration, for controlling individual bits in the registers, and a log page. The TX Configuration tab sheet
allows the IC to be set up easily without having to focus
on programming the registers. The register values can
be viewed in the Register View tab (Figure 3). This
allows easy prototyping with the GUI with different configuration settings.
The GPO Configuration tab sheet (Figure 2) displays
the various options available at GPO1, GPO2, and
SDO. These outputs are available through the TMUX
multiplexer. Changing the TMUX value populates the list
of outputs available to GPO1, GPO2, and SDO. Many
of these outputs can be used for debugging purposes.
This tab also displays the temperature. Click on the
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MAX7049 Evaluation Kits
Evaluate: MAX7049
Figure 1. MAX7049 EV Kit Software Main Window (TX Configuration Tab)
10
Maxim Integrated
MAX7049 Evaluation Kits
Evaluate: MAX7049
thermometer to display the IC temperature code. Various
clock output options are also available on this tab sheet.
Each EV kit GUI can open a predefined configuration or save a configuration to a file. The file type is
unique to the IC and has the extension “.m49”. This file
extension is loaded into the registers. Opening the file from
File | Open loads the file. To save the configuration
settings, go to File | Save. The file is automatically saved
with the correct extension. The enable state is not saved.
TX Configuration Tab
The TX Configuration tab sheet (Figure 1) highlights the
main features for setting the transmitter configuration.
The transmitter frequency has three specified ranges
through the GUI. The transmit frequency FTX ranges
are: 287.7MHz to 315MHz, 431.5MHz to 472.5MHz,
and 863MHz to 945MHz. The ASK amplitude and FSK
frequency deviation both use the internal shaping
registers. The GUI provides some common predefined
shaping values and automatically programs the shaping
registers when selected. The ASK amplitude and FSK
frequency deviation share the same shaping registers.
The TX Baud edit box internally sets the bit step size.
When a value is entered, the step size adjusts until it
comes closest to the desired baud rate.
GPO Configuration Tab
The GPO Configuration tab sheet (Figure 2) simplifies
the various GPO output-configuration options. SDO,
GPO1, and GPO2 multiplex various signals that can be
used for reading the temperature, finding the lock status,
outputting a clock, or for debugging purposes. GPO2 is
a stronger buffer and designed to drive a clock. It has
additional clock options that SDO and GPO1 do not.
Changing the TMUX value changes the outputs available to SDO, GPO1, and GPO2. Each TMUX provides 16
different output options. Many are empty options that do
not output anything. The states of those signals are also
shown in the TestBus0 and TestBus1 registers in the IC
and can be viewed in the Register View tab.
Maxim Integrated
Register View Tab
The Register View tab sheet (Figure 3) displays each
register’s individual bit logic-level status. A data bit in
bold indicates a logic-high, while a data bit that is not
bold indicates a logic-low. Clicking on the individual
data bit toggles the bit and performs a write and read
command. The new command is shown in the edit box
at the far right. Write commands can be written to the
registers alternatively by typing a hex value in the edit
box and pressing the Enter key on the keyboard
Log Page Tab
The Log Page tab sheet can be used to verify that a
command was executed. Next to the Log Page table is
an edit box that displays what was last written to the Log
Page. It is not necessary to switch to the Log Page to
verify if a command was sent.
Global Commands
Each EV kit GUI has a few commands that can be
viewed in every tab setting. The MAX7049 Enable
checkbox enables or disables the IC through the register
enable bit. The TX Data checkbox sets the internal data
bit (DATAIN) to logic-high or logic-low. The green color
indicates that the bit is set to logic-high and a red color
indicates that the bit is set to logic-low. The TX Ready
flag verifies that the IC transmitter is ready to transmit
data when green.
The Read All and Reset buttons are located near the top
left. To reset the IC from the GUI to the default values,
press the Reset button.
Applying External Signals
To apply an external signal to the ENABLE (enable)
and DATAIN (data in) test points, the respective jumper
must first be removed and the signal applied to the signal test point. For example, to apply an external signal
to DATAIN, uncheck the TX Data checkbox and then
remove the jumper from JU126 and apply the DATAIN
signal to the DATAIN test point. A complex pattern can
be sent using the transmitter in this fashion. The enable
works similarly. Ensure that the voltage range of the
external signals is limited to DVDD before applying the
signals.
11
MAX7049 Evaluation Kits
Evaluate: MAX7049
Figure 2. MAX7049 EV Kit Software (GPO Configuration Tab)
12
Maxim Integrated
MAX7049 Evaluation Kits
Evaluate: MAX7049
Figure 3. MAX7049 EV Kit Software (Register View Tab)
Maxim Integrated
13
MAX7049 Evaluation Kits
Evaluate: MAX7049
ASK Modulation Shaping
For any of the default modulation shapes, set the peak
amplitude setting in the ASK Amplitude edit box, click
on the modulation shape radio button in the Common
Shaping group box, and set the NRZ data rate in the
TX Baud edit box. The EV kit software sets the time and
amplitude step registers to produce a shaping profile
that matches the bit interval as close as possible, given
the time and amplitude step resolution.
The amplitude step register settings (there are 19
steps between the 20 amplitude samples, starting at 0
and ending at the final amplitude setting) and the time
between amplitude steps is given below for a 20kbps
NRZ ASK transmission with Gaussian shaping and an
amplitude setting of 40 (20mA PA current).
Txtstep = (0x08) (8 x 0.3125µs = 2.5µs)
Arbitrary shaping can be done by going to the Register
View tab and entering values into the TXTstep register
and the 19 shape registers individually. Ensure that the
sum of the 19 amplitude steps adds up to the desired
final amplitude value.
Table 4. ASK Shaping Example
14
TIME
(µs)
AMPLITUDE
REGISTER
AMPLITUDE
STEPS
CUMULATIVE
AMPLITUDE
0.00
Shape00
1
0
2.50
Shape01
1
1
5.00
Shape02
1
2
7.50
Shape03
2
3
10.00
Shape04
2
5
12.50
Shape05
3
7
15.00
Shape06
3
10
17.50
Shape07
3
13
20.00
Shape08
3
16
22.50
Shape09
3
19
25.00
Shape10
3
22
27.50
Shape11
3
25
30.00
Shape12
3
28
32.50
Shape13
3
31
35.00
Shape14
2
34
37.50
Shape15
2
36
40.00
Shape16
1
38
42.50
Shape17
1
39
45.00
Shape18
0
40
47.50
—
0
40
50.00
—
0
40
FSK Modulation Shaping
FSK transmission requires the user to select the data
rate, the frequency deviation, the transmitted power
(which is constant for the duration of the transmission),
and the rise time of the PA at the beginning of the
transmission. For any of the default modulation shapes,
set the peak-to-peak frequency deviation in the FSK
FDEV (kHz) edit box, click on the modulation shape
radio button in the Common Shaping group box, and
set the NRZ data rate in the TX Baud edit box. The EV
kit software sets the time and frequency deviation step
registers to produce a frequency-deviation profile that
matches the bit interval as close as possible, given the
time and frequency step resolution.
Next, select the amplitude of the FSK transmission in the
FSK Amplitude edit box and the size of the amplitude
step for the initial turn-on of the PA in the FSK Amplitude
Step edit box. The PA amplitude increases by the FSK
Amplitude Step every Txtstep interval until it reaches
the FSK Amplitude setting. The Txtstep interval is
Table 5. FSK Shaping Example
TIME
(µs)
FREQUENCY
REGISTER
STEP
CUMULATIVE
COUNT
CUMULATIVE
DEVIATION
(kHz)
0.00
Shape00
4
0
0
0.94
Shape01
9
4
0.98
1.88
Shape02
15
13
3.17
2.81
Shape03
20
28
6.84
3.75
Shape04
24
48
11.72
4.69
Shape05
27
72
17.58
5.63
Shape06
29
99
24.17
6.56
Shape07
31
128
31.25
7.50
Shape08
30
159
38.82
8.44
Shape09
31
189
46.14
9.38
Shape10
30
220
53.71
10.31
Shape11
31
250
61.04
11.25
Shape12
29
281
68.60
12.19
Shape13
27
310
75.68
13.13
Shape14
24
337
82.28
14.06
Shape15
20
361
88.13
15.00
Shape16
15
381
93.02
15.94
Shape17
9
396
96.68
16.88
Shape18
3
405
98.88
17.81
—
0
408
99.61
18.75
—
0
408
99.61
20.00
—
0
408
99.61
Maxim Integrated
MAX7049 Evaluation Kits
Evaluate: MAX7049
determined by the data-rate entry in the TX Baud
edit box, and is less than or equal to 1/20 of the data
interval (inverse of the data rate). For example, if the FSK
Amplitude setting is 20 and the FSK Amplitude Step
setting is 5, then the PA ramps up to its final amplitude in
4 x Txtstep, or approximatgely 1/5 of a bit interval.
The frequency step register settings (there are 19 steps
between the 20 frequency samples, starting at fBASE
(FTX - 0.5 x FDEV) and ending at the final frequency
setting) and the time between frequency steps is given
below for a 50kbps NRZ FSK transmission with Gaussian
shaping and a frequency-deviation setting of 100kHz.
The FSK deviation vs. time profile starts 50kHz below
the transmitted carrier frequency and ends 50kHz
above the transmitted carrier frequency. The resolution
of each frequency step is equal to the resolution of the
fractional-N synthesizer. For a 16MHz crystal, this resolution is slightly less than 250Hz.
Txtstep = (0x03)(3 x 0.3125µs = 0.9375µs)
Notice that this shaping profile reaches the total
frequency deviation before the end of the bit interval
(17.81µs vs. 20µs bit interval) so there is a small portion
of the bit interval where the frequency does not change.
This is because the resolution of Txtstep is 0.3125µs and
this is the closest 20 steps can come to a bit interval.
Arbitrary shaping can be done by going to the Register
View tab and entering values in the TXTstep register
and the 19 shape registers individually. Ensure that the
sum of the 19 frequency steps adds up to the desired
final peak-to-peak frequency deviation.
Useful Tips
Each EV kit contains a simple GUI for demonstrating
the IC. Some actions do multiple writes and reads in the
background. To ensure that the software works correctly,
follow the tips below:
•
Ensure that the jumpers are installed in their default
positions.
•
When the program is started, verify that Hardware:
Connected is displayed in the lower-left side of the
status bar and MAX7049 Detected is displayed in
the lower-right side of the status bar.
•
When unplugging the USB cable, wait approximately 5s before plugging it back in. This lets the
VANALOG supply drop below the reset threshold.
•
After plugging the USB cable from the PC to the
EV kit, wait approximately 5s before running the
software. The USB driver needs time to be detected
before the software can be run.
Maxim Integrated
Detailed Description of Hardware
The MAX7049 EV kits provide a proven layout for the
MAX7049 frequency-programmable ASK/FSK transmitter. On-board test points are included to monitor various
signals (Table 4).
Power Supply
The device can operate from a 2.1V to 3.6V supply. Each
EV kit has several options to power off the USB, or the
user can externally supply a voltage to the control side.
To power from the USB supply, change the shunt on
J100 to the 7-8 position on the control side. The shunt
is in the 7-8 position by default. That position makes
VDUT equal to VADJ. The user can monitor VADJ with
a voltmeter and change the potentiometer resistance to
adjust the voltage between 2.1V and 3.6V. Do not put
the shunt on J1 in the 3-4 position because that sets
VDUT equal to VBUS (5V), which exceeds the allowable supply voltage. The 1-2 position on J100 allows the
VDUT to be powered from a battery. Battery holders (not
populated) are required.
External Supplies
The device has various supply inputs that can all be
powered independently. These supplies are on the DUT
side and powered by the VANALOG net coming from
the control side. All supplies are connected together by
default. For current measurements on a specific supply,
change the jumper associated with that supply and apply
a voltage to the test point to the right of that jumper. It
should be noted that DUT current measurements can
be influenced by the state of the digital control lines. If a
separate external supply is being used for the DUT (with
both JU111 and JU115 open), the most accurate current
measurement is observed when the control-side circuitry
is supplied with the same DC voltage (e.g., the DUT side
and control side powered from separate +3.0V supplies).
External SPI
Remove the shunts from the SPI jumpers and apply
the signals to the SPI test points. The SPI jumpers are
located on JU122, JU123, JU124, and JU128 (Table 7).
The external SPI signals need to be limited to the DVDD
supply voltage. J101 can be used for observing SPI signals on the control side (Table 8).
External Frequency Input
For applications where an external frequency is desired
over the crystal frequency, it is possible to apply an
external frequency through the XTAL SMA connector.
Resistor R12 is necessary (use 0I). The GUI default
crystal frequency is 16MHz. To change the frequency,
go to Options | Crystal Frequency and select one of the
three options listed for crystal frequencies.
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MAX7049 Evaluation Kits
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Table 6. DUT-Side Signal Test Points
NAME
GPO1
LSHDN
HOP
GPO2
JUMPER
NAME
GPO1 can output various internal signals
dependent on the value of TMUX.
DESCRIPTION
JU122
JU123
CS
DI
Hardware disable for the IC.
JU124
SCLK
This signal can optionally be used for
frequency hopping.
JU128
SDO
GPO2 can output various internal signals
dependent on the value of TMUX. GPO2 is
specifically designed to drive a clock output.
Table 8. SPI Header (J101)
JUMPER
POSITION
NAME
DESCRIPTION
CS
DI
Chip-select for SPI.
1
VMICROL
SPI I/O logic voltage
Serial data in for SPI.
2
MAXQ_SS
SPI chip-select
SCLK
Serial clock for SPI.
3
MAXQ_SCLK
SPI clock
ENABLE
Hardware enable for the IC.
4
MAXQ_MOSI
SPI data out (goes to DI)
DATAIN
Hardware Tx data for the IC.
5
MAXQ_MISO
SPI data in (goes to SDO)
Serial data out for SPI.
6
GND
SDO
16
Table 7. SPI Jumpers and Test Points
GND
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MAX7049 Evaluation Kits
Evaluate: MAX7049
Figure 4a. MAX7049 EV Kits Schematic (Sheet 1 of 5)
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17
MAX7049 Evaluation
Evaluate:
MAX7049 Kits
Figure 4b. MAX7049 EV Kits Schematic (Sheet 2 of 5)
18
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MAX7049 Evaluation Kits
Evaluate: MAX7049
Figure 4c. MAX7049 EV Kits Schematic (Sheet 3 of 5)
Maxim Integrated
19
MAX7049 Evaluation Kits
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Figure 4d. MAX7049 EV Kits Schematic (Sheet 4 of 5)
20
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MAX7049 Evaluation Kits
Evaluate: MAX7049
Figure 4e. MAX7049 EV Kits Schematic (Sheet 5 of 5)
Maxim Integrated
21
MAX7049 Evaluation
Evaluate:
MAX7049 Kits
Figure 4b. MAX7049 EV Kits Schematic (Sheet 2 of 5)
18
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MAX7049 Evaluation Kits
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1.0”
Figure 7. MAX7049 EV Kits PCB Layout—Inner Layer 2
1.0”
Figure 8. MAX7049 EV Kits PCB Layout—Inner Layer 3
Maxim Integrated
23
MAX7049 Evaluation Kits
Evaluate: MAX7049
1.0”
Figure 9. MAX7049 EV Kits PCB Layout—Solder Side
1.0”
Figure 10. MAX7049 EV Kits Component Placement Guide—Solder Side
24
Maxim Integrated
MAX7049 Evaluation Kits
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Revision History
REVISION
NUMBER
REVISION
DATE
0
7/12
DESCRIPTION
Initial release
PAGES
CHANGED
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
© Maxim Integrated
25
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