eco power design ECOEWI 2.4 GHz Transceiver User Manual EWI Module

eco power design llc 2.4 GHz Transceiver EWI Module

Contents

Manual r1

EcoPowerDesign
EWI
Usermanual
2.4GHzIEEEStd.802.15.4™
TransceiverModule
2.4GHzIEEEStd.802.15.4TM5dBmRFTransceiverModule
APPLICATIONS
• IEEE 802.15.4 systems
• ZigBee® systems
• Industrial monitoring and control
• Home and building automation
• Automatic Meter Reading
• Low-power wireless sensor networks
• Set-top boxes and remote controls
• Consumer electronics
KEY FEATURES
• State-of-the-art selectivity/co-existence
• Adjacent channel rejection: 49 dB
• Alternate channel rejection: 54 dB
• Excellent link budget (103dB)
• 400 m Line-of-sight range
• Extended temp range (-40 to +125°C)
• Wide supply range: 1.8 V – 3.8 V
• Extensive IEEE 802.15.4 MAC hardware
support to offload the microcontroller
• AES-128 security module
• CC2420 interface compatibility mode
Low Power
• RX (receiving frame, -50 dBm) 18.5 mA
• TX 33.6 mA @ +5 dBm
• TX 25.8 mA @ 0 dBm
• <1µA in power down
Radio
• IEEE 802.15.4 compliant DSSS
baseband modem with 250 kbps data
rate
• Excellent receiver sensitivity (-98 dBm)
• Programmable output power up to +5
dBm
• RF frequency range 2394-2507 MHz
• Suitable for systems targeting
compliance with US radio frequency
regulations,
• FCC CFR47 Part 15
Microcontroller Support
• Digital RSSI/LQI support
• Automatic clear channel assessment for
CSMA/CA
• Automatic CRC
• 768 bytes RAM for flexible buffering and
security processing
• Fully supported MAC security
• 4 wire SPI
• Interrupt generator
• Frame filtering and processing engine
• Random number generator
FIGURE1:PinDiagram
GND J2‐6
RESET
ˉˉˉˉˉˉˉˉˉˉˉ J2‐5
ENABLE J2‐4
INT J2‐3
SI J2‐2
SCK J2‐1
J1‐1 GND
J1‐2 GND
J1‐3 3V3
J1‐4 NC
J1‐5 CS
ˉˉˉ
J1‐6 SO
ANT
Table of Contents
1.0DEVICEOVERVIEW4
2.0CIRCUITDESCRIPTION8
3.0REGULATORYAPPROVAL12
4.0ELECTRICALCHARACTERISTICS14
1.0 Device Overview
TheEWImoduleisa2.4GHzIEEEStd.
802.15.4™compliant,surfacemount
modulewithintegratedcrystal,
internalvoltageregulator,matching
circuitry,andamonopole“whip”
antenna.TheEWImoduleoperatesin
thenon‐licensed2.4GHzfrequency
band.Theintegratedmoduledesign
freestheintegratorfromextensiveRF
andantennadesign,andregulatory
compliancetesting,allowingquicker
timetomarket.

TheEWImodulehasreceived
regulatoryapprovalsformodular
devicesintheUnitedStates(FCC).
Modularapprovalremovestheneed
forexpensiveRFandantennadesign,
andallowstheendusertoplacethe
EWImoduleinsideafinishedproduct
andnotrequireregulatorytestingfor
anintentionalradiator(RF
transmitter).
FIGURE11:EWIblockdiagram
EWIIEEEStd.802.15.4™Module
1.1 Interface Description
Figure1‐1showsasimplifiedblock
diagramoftheEWImodule.The
moduleisbasedontheTexas
InstrumentCC2520IEEE802.15.4TM
2.4GHzRFTransceiverIC.The
moduleinterfacestomanypopular
microcontrollersviaa4‐wireserial
SPIinterface,interrupt,enable,Reset,
powerandground,asshowninFigure
1‐2.Table1‐1providesthepin
descriptions.
DatacommunicationswiththeEWI
modulearedocumentedinthe
“CC2520DATASHEET2.4GHZIEEE
802.15.4/ZIGBEE®RF
TRANSCEIVER”(SWRS068
DECEMBER2007).Refertothe
CC2520DataSheetforspecificserial
interfaceprotocolandregister
definitions.
CC2520
Monopole
“whip”
Antenna
Interface Digital
I/O
SPI
Power
32MHz
Crystal
Power
Mgmnt
MAC
Phy
TABLE11:PinDescription
PinSymbolTypeDescription
J2‐6 GND Power Ground
J2‐5 RESET
ˉˉˉˉˉˉˉˉˉˉˉ DI GlobalhardwareResetpin
J2‐4 ENABLE DI Externalwake‐uptrigger
J2‐3 INT DO Interruptpintomicrocontroller
J2‐2 SI DI Serialinterfacedatainput
J2‐1 SCK DI Serialinterfaceclock
J1‐6 SO DO SerialinterfacedataoutputfromCC2520
J1‐5 CS
ˉˉˉ DI Serialinterfaceenable
J1‐4 NC ‐‐ Noconnection
J1‐3 3V3 Power Powersupply
J1‐2 GND Ground Ground
J1‐1 GND Ground Ground
Legend:Pintypeabbreviation:D=Digital,I=Input,O=Output
FIGURE12:MicrocontrollertoEWIModuleInterface
MicrocontrollerCC2520
1.2 Mounting Details
TheEWIisasurfacemountablemodule.
ModuledimensionsareshowninFigure1‐
3.ThemodulePrintedCircuitBoard(PCB)
is0.032"thickwith0.1inconnectionpins
asshowninfig1‐3.Figure1‐4isa
recommendedhostPCBfootprintforthe
EWI.
TheEWIhasamonopole“whip”antenna.
Forthebestperformance,followthe
mountingdetailsshowninFigure1‐5.Itis
recommendedthatthemodulebe
mountedwithnometallicstructuresin
theareamarkedin
fig1‐5
FIGURE13:ModuleDetails
FIGURE14:RecommendedPCB
Footprint
FIGURE15:MountingDetails
2.0 Circuit Description
TheEWIisacomplete2.4GHzIEEE
Std.802.15.4™compliantsurface
mountmodulewithintegratedcrystal,
internalvoltageregulator,matching
circuitry,andamonopole“whip”
antenna.TheEWImoduleinterfaces
tomanypopularmicrocontrollersvia
a4‐wireserialSPIinterface,interrupt,
wake,Reset,powerandground.Data
communicationswiththeEWImodule
aredocumentedinthe“CC2520
DATASHEET2.4GHZIEEE
802.15.4/ZIGBEE®RF
TRANSCEIVER”(SWRS068
DECEMBER2007).Refertothe
CC2520DataSheetforspecificserial
interfaceprotocolandregister
definitions.
2.1 Schematic
Aschematicdiagramofthemoduleis
showninFigure2‐1andtheBillof
Materials(BOM)isshowninTable2‐1.
TheEWImoduleisbasedontheTexas
InstrumentsCC2520IEEE802.15.4™
2.4GHzRFTransceiverIC(U1).The
serialI/O(SCK,SI,SOandCS),RESET,
ENABLEandINTpinsarebroughtout
tothemodulepins.
Crystal,X1,isa32MHzresonatorwith
afrequencytoleranceof±10ppm@
25°CtomeettheIEEEStd.802.15.4
symbolratetoleranceof±40ppm.
FIGURE21:EWISchematic
TABLE21:EWIBillOfMaterial
RefDescription
Manufacturer
(alt.Manuf.)
PartNumber
(alt.Part.No.)
C1 Capacitor04020.9pFNP0
JohansonTechnology
(Murata)
500R07S0R9BV4S
(GJM1555C1HR90BB01D)
C2 Capacitor04021.5pFNP0
JohansonTechnology
(Murata)
500R07S1R5BV4S
(GJM1555C1H1R5CB01D)
C12 Capacitor04021uFX5R Murata GRM155R60J105KE19
C3 Capacitor04021.5pFNP0 Murata GRM1555C1H1R5CZ01
C13 Capacitor04021.8pFNP0 Murata GRM1555C1H1R8CZ01
C8 Capacitor040215pFNP0 Murata GRM1555C1H150JZ01
C10 Capacitor040215pFNP0 Murata GRM1555C1H150JZ01
C5 Capacitor040239pFNP0 Murata GRM1555C1H390JZ01
C4 Capacitor040282pFNP0 Murata GRM1555C1H820JZ01
C6 Capacitor0402100nFX5R Murata GRM155R61A104KA01
C7 Capacitor0402100nFX5R Murata GRM155R61A104KA01
C9 Capacitor0402100nFX5R Murata GRM155R61A104KA01
C11 Capacitor0402100nFX5R Murata GRM155R61A104KA01
J1
ConnectorPLS‐6,6pin
2.54mmpitch 
J2
ConnectorPLS‐6,6pin
2.54mmpitch 
D1 TransceiverIEEE802.15.4 TI CC2520RHDT
L1 Inductor04023nH
JohansonTechnology
(Murata)
L‐07C3N0SV6S
(LQG15HN3N0S02D)
L2 Inductor04021.8nH
JohansonTechnology
(Murata)
L‐07C1N8SV6S
(LQG15HN1N8S02D)
L3 Inductor04022.4nH
JohansonTechnology
(Murata)
L‐07C2N4SV6S
(LQG15HN2N4S02D)
R2 Resistor0402395% any
R1 Resistor040256k1% any
X1
32MHzresonator,8pF,80
Ohm,10ppm(25C),
15ppm
(temperaturerange),
‐40...+85C,3.2x2.5mm SJK
SJK‐7U‐32.000‐08‐10‐60‐
C‐15
8pF,10ppm(25C),
‐40...+85C,3.2x2.5mm PDI C332000XFAD08XX
8pF,50ppm(25C),
‐40...+125C,3.2x2.5mm PDI C332000XFCS08RX
2.2 Printed Circuit Board
TheMRF24J40MBmoduleprinted
circuitboardisconstructedwithFR4
material,fourlayersand0.032inches
thick.ThelayersareshowninFigure
2‐2throughFigure2‐6.Thestackup
ofthePCBisshowninFigure2‐7.
FIGURE22:TopSilkScreen
FIGURE23:TopCopper
FIGURE 2-4: Bottom Copper
2.3 Monopole “whip” Antenna
TheEWIhasamonopole“whip”
antenna.Thegroundandpower
planesunderthecomponentsserveas
acounterpoisetothe“whip”antenna.
Additionalgroundplaneonthehost
PCBwillsubstantiallyenhancethe
performanceofthemodule.Forbest
performance,placethemoduleonthe
hostPCBfollowingthe
recommendationsinSection1.2
“MountingDetails”.
Thedesigngoalwastocreatea
compact,low‐costantennawiththe
bestradiationpattern.Figure2‐9
showsthesimulationdrawingand
Figure2‐10andFigure2‐11showthe
2Dand3Dradiationpatterns,
respectively.Asshownbythe
radiationpatterns,theperformanceof
theantennaisdependantuponthe
orientationofthemodule.Figure2‐12
showstheimpedancesimulationand
Figure2‐13showstheSWR
simulation.Thediscretematching
circuitrymatchestheimpedanceof
theantennawiththeCC2520
transceiverIC.
3.0 Regulatory Approval
TheEWImodulehasreceived
regulatoryapprovalsformodular
devicesintheUnitedStates.Modular
approvalallowstheendusertoplace
theEWImoduleinsideafinished
productandnotrequireregulatory
testingforanintentionalradiator(RF
transmitter),providednochangesor
modificationsaremadetothemodule
circuitry.Changesormodifications
couldvoidtheuser’sauthorityto
operatetheequipment.Theenduser
mustcomplywithallofthe
instructionsprovidedbytheGrantee,
whichindicateinstallationand/or
operatingconditionsnecessaryfor
compliance.
Theintegratormaystillberesponsible
fortestingtheendproductforany
additionalcompliancerequirements
requiredwiththismodule,installed
(forexample:digitaldeviceemission,
PCperipheralrequirements,etc.)in
thespecificcountrythattheend
devicewillbemarketed.
AnnexFoftheIEEEStd.802.15.4
documenthasagoodsummaryof
regulatoryrequirementsinvarious
countriesconcerningIEEEStd.
802.15.4devices.Thestandardcanbe
downloadedfromtheIEEEStandards
webpage:
http://standards.ieee.org/getieee802
/802.15.html.
Refertothespecificcountryradio
regulationsfordetailsonregulatory
compliance.
3.1 United States
TheEWImodulehasreceivedFederaö
CommunicationsCommission(FCC)
CFR47Telecommunications,Part15
SubpartC“IntentionalRadiators”
15.247andmodularapprovalin
accordancewithFCCPublicNoticeDA
00‐1407Released:June26,2000,Part
15UnlicensedModularTransmitter
Approval.TheEWImodulecanbe
integratedintoafinishedproduct
withoutobtainingsubsequentand
separateFCCapprovals.
TheEWImodulehasbeenlabeled
withitsownFCCIDnumber,andifthe
FCCIDisnotvisiblewhenthemodule
isinstalledinsideanotherdevice,then
theoutsideofthefinishedproduct
intowhichthemoduleisinstalled
mustalsodisplayalabelreferringto
theenclosedmodule.Thisexterior
labelcanusewordingsuchasthe
following:
ContainsTransmitterModuleFCCID:
OA3EWI
‐or‐
ContainsFCCID:OA3EWI
ThisdevicecomplieswithPart15of
theFCCRules.Operationissubjectto
thefollowingtwoconditions:(1)this
devicemaynotcauseharmful
interference,and(2)thisdevicemust
acceptanyinterferencereceived,
includinginterferencethatmaycause
undesiredoperation.
Thisequipmenthasbeentestedand
foundtocomplywiththelimitsfora
ClassBdigitaldevice,pursuanttopart
15oftheFCCRules.Theselimitsare
designedtoprovidereasonable
protectionagainstharmful
interferenceinaresidential
installation.Thisequipment
generates,usesandcanradiateradio
frequencyenergy,andifnotinstalled
andusedinaccordancewiththe
instructions,maycauseharmful
interferencetoradiocommunications.
However,thereisnoguaranteethat
interferencewillnotoccurina
particularinstallation.Ifthis
equipmentdoescauseharmful
interferencetoradioortelevision
reception,whichcanbedetermined
byturningtheequipmentoffandon,
theuserisencouragedtotryto
correcttheinterferencebyoneor
moreofthefollowingmeasures:
‐Reorientorrelocatethereceiving
antenna.
‐Increasetheseparationbetweenthe
equipmentandreceiver.
‐Connecttheequipmentintoan
outletonacircuitdifferentfromthat
towhichthereceiverisconnected.
‐Consultthedealeroranexperienced
radio/TVtechnicianforhelp.
3.1.1 EWI Settings
TomeettheFCCrequirements,the
followingsettingsmustbeobserved
bytheintegrator:
•TheEWItransmitpowersetting
(RFCON30x203)cannotexceed‐1.9
dB.
•Onlychannels11through25maybe
selected(RFCON00x200).
3.1.2 RF Exposure
AlltransmittersregulatedbyFCC
mustcomplywithRFexposure
requirements.OETBulletin65
“EvaluatingCompliancewithFCC
GuidelinesforHumanExposureto
RadioFrequencyElectromagnetic
Fields”providesassistancein
determiningwhetherproposedor
existingtransmittingfacilities,
operationsordevicescomplywith
limitsforhumanexposuretoRadio
Frequency(RF)fieldsadoptedbythe
FederalCommunicationsCommission
(FCC).Thebulletinoffersguidelines
andsuggestionsforevaluating
compliance.
Ifappropriate,compliancewith
exposureguidelinesformobileand
unlicenseddevicescanbe
accomplishedbytheuseofwarning
labelsandbyprovidinguserswith
informationconcerningminimum
separationdistancesfrom
transmittingstructuresandproper
installationofantennas.
Thefollowingstatementmustbe
includedasaCAUTIONstatementin
manualsandOEMproductstoalert
usersofFCCRFexposurecompliance:
TosatisfyFCCRFexposure
requirementsformobileandbase
stationtransmissiondevices,a
separationdistanceof20cmormore
shouldbemaintainedbetweenthe
antennaofthisdeviceandpersons
duringoperation.Toensure
compliance,operationatcloserthan
thisdistanceisnotrecommended.
Theantenna(s)usedforthis
transmittermustnotbeco‐locatedor
operatinginconjunctionwithany
otherantennaortransmitter.
IftheEWImoduleisusedinaportable
application(antennaislessthan20
cmfrompersonsduringoperation),
theintegratorisresponsiblefor
performingSpecificAbsorptionRate
(SAR)testinginaccordancewith
FCCrules2.1091.
3.1.3 Helpful Web Sites
FederalCommunicationsCommission
(FCC):http://www.fcc.gov
4.0 Electrical Characteristics
TABLE41:RecommendedOperatingConditions
ParametersMinTypMaxUnits
AmbientOperatingTemperature ‐40  125 °C
SupplyVoltageforRF,AnalogandDigitalCircuits 1.8 3.8 V
SupplyVoltageforDigitalI/O   
InputHighVoltage 80% ofVDD
InputLowVoltage 30%  ofVDD
TABLE42:CurrentConsumption
TA=25°C,VDD=3.0V,fc=2440MHzifnothingelsestated.AllparametersmeasuredonTexasInstruments’
CC2520EM2.1referencedesignwith50Ωload
Parameter
ConditionMinTypMax
Units
Receive
current
Waitforsync
TA=‐40to125°C,VDD=1.8to3.8V,
fc=2394to2507MHz
Waitforsync,Low‐currentRXsetting
Recevingframe,‐50dBminputlevel
22.324.8
 26.3
18.8
18.8
mA
mA
mA
mA
Transmit
current
0dBmsetting
+5dBmsetting
TA=‐40to125°C,VDD=1.8to3.8V,
fc=2394to2507MHz
25.828.8
33.637.2
 37.5
mA
mA
mA
ActiveMode
current
XOSCon,digitalregulatoron.
TA=‐40to125°C,VDD=1.8to3.8V,
fc=2394to2507MHz
1.6 1.9
 2.6
mA
mA
LPM1current XOSCoff,digitalregulatoron.Stateretention.
TA=‐40to125°C,VDD=1.8to3.8V,
fc=2394to2507MHz
175 250
  1000
µA
µA
LPM2current XOSCoff,digitalregulatoroff.Nostateretention.
TA=‐40to125°C,VDD=1.8to3.8V,
fc=2394to2507MHz
30 120
 4.5
nA
µA
TABLE43:ReceiverACCharacteristics
TA=25°C,VDD=3.0V,fc=2440MHzifnothingelsestated.AllparametersmeasuredonTexas
Instruments’CC2520EM2.1referencedesignwith50Ωload.
Parameter
ConditionMinTypMax
Units
Receiver
sensitivity
[2]requires‐85dBm
TA=‐40to125°C,VDD=1.8to3.8V,fc=2394to2507
MHz
‐99 ‐98 ‐95
‐88 
dBm
Saturation [2]requires‐20dBm6dBm
Interferer
Rejection
Wantedsignal3dBabovethesensitivitylevel,
802.15.4modulated
interfererat802.15.4channels:
 ±5MHzfromwantedsignal.[2]requires0dB
 ±10MHzfromwantedsignal.[2]requires30
dB
 ±20MHzorabove.Wantedsignalat‐82dBm.
 49
 54
 55
dB
dB
dB
Maximum
Spurious
Emission
Conducted
measurementin
a50Ωsingle
endedload.
Complieswith
EN300328,EN
300440class2,
FCCCFR47,Part
15andARIB
STD‐T‐66
30–1000MHz
1–12.75GHz
<‐80
 ‐56
dBm
dBm
Frequency
error
tolerance
Inputlevelis3dBabovesensitivitylevel. +/‐400 kHz
IIP3  ‐24 dBm



TABLE44:TransmitterACCharacteristics
Parameter
ConditionMinTypMax
Units
Outputpower
Note:toreduce
theoutput
powervariation
over
temperature,it
issuggested
thatdifferent
0dBmsetting
+5dBmsetting
T
A=‐40to85°C,VDD=2.0to3.8V,
f
c=2394to2507MHz
T
A=‐40to85°C,VDD=1.8to3.8V,
‐3 1 5
2 5 7
‐3  8
dBm
dBm
dBm
settingsare
usedat
different
temperatures.
Theon‐chip
temperature
sensorcanbe
usedforthis
purpose.
Pleasesee
section5.11for
more
information.
Largest
spurious
emissionat
maximum
outputpower.
Texas
Instruments
CC2520EM
reference
designcomplies
withEN300
328,EN300
440,FCCCFR47
Part15and
ARIBSTDT‐66.
Transmiton
2480MHz
underFCCat+5
dBmis
supportedby
duty‐cycling,or
byreducing
outputpower.
Thepeak
conducted
spurious
emissionmight
violateETSIand
FCCrestricted
bandlimitsat
frequencies
below1GHz.All
radiated
spurious
emissionsare
withinthe
limitsof
ETSI/FCC/
ARIB.
Applications
thatmustpass
conducted
requirements
aresuggestedto
useasimple50
f
c=2394to2507MHz
T
A=‐40to125°C,VDD=2.0to3.8V,
f
c=2394to2507MHz
T
A=‐40to125°C,VDD=1.8to3.8V,
f
c=2394to2507MHz
25MHz–1GHz(outsiderestrictedbands)
25MHz–1GHz(withinFCCrestrictedbands)
47‐74,87.5‐118,174‐230,470‐862MHz(ETSI
restrictedbands)
1800MHz‐1900MHz(ETSIrestrictedband)
5150MHz‐5300MHz(ETSIrestrictedband)
At2483.5MHzandabove(FCCrestrictedband)
f
c=2480MHz,+5dBm
f
c=2480MHz,0dBm

At2·RFand3·RF(FCCrestrictedband)
‐4  8
‐6  8
‐9  8
 ‐40
 ‐53
 ‐42
 ‐56
 ‐54
 ‐37
 ‐41
 ‐54
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
Ωhighpass
filterbetween
matching
networkandRF
connector.
ErrorVector
Magnitude
(EVM)
[2]requiresmax.35%.Measuredasdefinedby[2].
 +5dBmsetting.fc=IEEE802.15.4channels
 0dBmsetting.fc=IEEE802.15.4channels
6
2
%
%

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