RN2903 DATA SHEET (12/18/2015) DOWNLOAD

RN2903
Low-Power Long Range LoRa® Technology
Transceiver Module
General Features
•
•
•
•
On-board LoRaWAN™ protocol stack
ASCII command interface over UART
Compact form factor: 17.8 x 26.7 x 3.34 mm
Castellated SMT pads for easy and reliable PCB
mounting
• Environmentally friendly, RoHS compliant
• Compliance:
- Modular Certified for the United States (FCC)
and Canada (IC)
- Australia and New Zealand
• Device Firmware Upgrade (DFU) over UART, see
“RN2903 LoRa® Technology Module Command
Reference User’s Guide” (DS40001811)
Operational
• Single operating voltage: 2.1V to 3.6V (3.3V
typical)
• Temperature range: -40°C to +85°C
• Low-power consumption
• Programmable RF Communication Bit Rate up to
300 kbps with FSK modulation, 12500 bps with
LoRa® Technology modulation
• Integrated MCU, Crystal, EUI-64 Node Identity
Serial EEPROM, Radio Transceiver with Analog
Front End, Matching Circuitry
• 14 GPIOs for control and status
RF/Analog Features
• Low-Power Long Range Transceiver operating in
the 915 MHz frequency band
• High Receiver Sensitivity: down to -146 dBm
• TX Power: adjustable up to +18.5 dBm high
efficiency PA
• FSK, GFSK, and LoRa Technology modulation
• IIP3 = -11 dBm
• Up to 15 km coverage at suburban and up to 5 km
coverage at urban area
 2015 Microchip Technology Inc.
Description
Microchip’s RN2903 Low-Power Long Range LoRa
Technology Transceiver module provides an easy to
use, low-power solution for long range wireless data
transmission. The advanced command interface offers
rapid time to market.
The RN2903 module complies with the LoRaWAN
Class A protocol specifications. It integrates RF, a
baseband
controller,
command
Application
Programming Interface (API) processor, making it a
complete long range solution.
The RN2903 module is suitable for simple long range
sensor applications with external host MCU.
Applications
•
•
•
•
•
•
Automated Meter Reading
Home and Building Automation
Wireless Alarm and Security Systems
Industrial Monitoring and Control
Machine to Machine (M2M)
Internet of Things (IoT)
DS50002390B-page 1
RN2903
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 3
2.0 General Specifications ................................................................................................................................................................. 6
3.0 Typical Hardware Connections..................................................................................................................................................... 8
4.0 Physical Dimensions .................................................................................................................................................................... 9
5.0 Application Information............................................................................................................................................................... 10
6.0 Regulatory Approval ................................................................................................................................................................... 13
Appendix A: Revision History ............................................................................................................................................................... 17
The Microchip Web Site ....................................................................................................................................................................... 19
Customer Change Notification Service ................................................................................................................................................ 19
Customer Support ................................................................................................................................................................................ 19
Product Identification System............................................................................................................................................................... 21
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
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If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
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Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
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• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
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Register on our web site at www.microchip.com to receive the most current information on all of our products.
DS50002390B-page 2
 2015 Microchip Technology Inc.
RN2903
1.0
DEVICE OVERVIEW
The RN2903 transceiver module features LoRa
Technology RF modulation, which provides long range
spread spectrum communication with high interference
immunity.
LoRa Technology modulation also provides significant
advantages in both blocking and selectivity compared
to the conventional modulation techniques, solving the
traditional design compromise between extended
range, interference immunity, and low-power
consumption.
Using LoRa Technology modulation technique,
RN2903 can achieve a receiver sensitivity of -146 dBm.
The high sensitivity combined with the integrated
+18.5 dBm output power amplifier yields industry
leading link budget, which makes it optimal for
applications requiring extended range and robustness.
The RN2903 module delivers exceptional phase noise,
selectivity, receiver linearity, and IIP3 for significantly
lower power consumption. The level of conductive
harmonics is below -70 dBm. Figure 1-1, Figure 1-2,
and Figure 1-3 show the top view, the pinout, and the
block diagram of the module.
FIGURE 1-1:
FIGURE 1-2:
28 GND
29 NC
30 TEST0
31 TEST1
GND 20
NC 19
NC 18
NC 17
32 RESET
33 GND
NC 16
NC 15
34 VDD
35 GPIO0
GPIO10 14
GPIO11 13
38 GPIO3
39 GPIO4
GPIO12 10
GPIO13 9
36 GPIO1
37 GPIO2
VDD 12
GND 11
40 GPIO5
41 GND
GND 8
UART_RX 7
UART_TX 6
42 NC
43 GPIO6
RESERVED 5
RESERVED 4
44 GPIO7
45 GPIO8
UART_CTS 3
UART_RTS 2
GND 1
46 GPIO9
47 GND
FIGURE 1-3:
GND 22
GND 21
NC 25
GND 24
RF 23
RN2903 PIN DIAGRAM
GND 27
GND 26
RN2903 TOP VIEW
RN2903 BLOCK DIAGRAM
Host MCU
RN2903 Module
MCU
UART
Command Processor
LoRaWANTM Protocol Stack
14 GPIO Pins
I2C
Real Time
Clock
SPI
EUI-64
EEPROM
32768 Hz
Crystal
LoRa® Technology
Radio
User Hardware:
Status LEDs, 6witches, /ogic IOs, etc.
 2015 Microchip Technology Inc.
Antenna
915 MHz
DS50002390B-page 3
RN2903
Table 1-1 describes the pins of the module.
TABLE 1-1:
Pin
PIN DESCRIPTION
Name
Type
Description
1
GND
Power
Ground supply terminal
2
UART_RTS
Output
Communication UART RTS signal(1)
3
UART_CTS
Input
Communication UART CTS signal(1)
4
RESERVED
—
Do not connect
5
RESERVED
—
Do not connect
6
UART_TX
Output
Communication UART Transmit (TX)
7
UART_RX
Input
Communication UART Receive (RX)
8
GND
Power
Ground supply terminal
9
GPIO13
Input/Output
General purpose I/O pin
10
GPIO12
Input/Output
General purpose I/O pin
11
GND
Power
Ground supply terminal
12
VDD
Power
Positive supply terminal
13
GPIO11
Input/Output
General purpose I/O pin
14
GPIO10
Input/Output
General purpose I/O pin
15
NC
—
Not connected
16
NC
—
Not connected
17
NC
—
Not connected
18
NC
—
Not connected
19
NC
—
Not connected
20
GND
Power
Ground supply terminal
21
GND
Power
Ground supply terminal
22
GND
Power
Ground supply terminal
23
RF
RF analog
RF signal pin
24
GND
Power
Ground supply terminal
25
NC
—
Not connected
26
GND
Power
Ground supply terminal
27
GND
Power
Ground supply terminal
28
GND
Power
Ground supply terminal
29
NC
—
Not connected
30
TEST0
—
Do not connect
31
TEST1
—
Do not connect
32
RESET
Input
Active-low device Reset input
33
GND
Power
Ground supply terminal
34
VDD
Power
Positive supply terminal
35
GPIO0
Input/Output
General purpose I/O pin
36
GPIO1
Input/Output
General purpose I/O pin
37
GPIO2
Input/Output
General purpose I/O pin
38
GPIO3
Input/Output
General purpose I/O pin
39
GPIO4
Input/Output
General purpose I/O pin
40
GPIO5
Input/Output
General purpose I/O pin
41
GND
Power
Ground supply terminal
42
NC
—
Not connected
43
GPIO6
Input/Output
General purpose I/O pin
DS50002390B-page 4
 2015 Microchip Technology Inc.
RN2903
TABLE 1-1:
Pin
PIN DESCRIPTION (CONTINUED)
Name
Type
Description
44
GPIO7
Input/Output
General purpose I/O pin
45
GPIO8
Input/Output
General purpose I/O pin
46
GPIO9
Input/Output
General purpose I/O pin
47
GND
Power
Ground supply terminal
Note 1: Optional handshake lines are supported in future firmware releases.
 2015 Microchip Technology Inc.
DS50002390B-page 5
RN2903
2.0
GENERAL SPECIFICATIONS
Table 2-1 provides the general specifications for the module. Table 2-2, Table 2-3, and Table 2-4 provide the electrical
characteristics, current consumption, and dimensions of the module. Table 2-5 shows the RF output power calibration
data.
TABLE 2-1:
GENERAL SPECIFICATIONS
Specification
Description
Frequency Band
902.000 MHz to 928.000 MHz
Modulation Method
FSK, GFSK, and LoRa® Technology modulation
Maximum Over-the-Air Data Rate
300 kbps with FSK modulation; 12500 bps with LoRa Technology modulation
RF Connection
Board edge connection
Interface
UART
Operation Range
Up to 15 km coverage at suburban; up to 5 km coverage at urban area
Sensitivity at 0.1% BER
-146 dBm(1)
RF TX Power
Adjustable up to max. +18.5 dBm on 915 MHz band(2)
Generated Conductive Harmonics Below -70 dBm
Level
Temperature (operating)
-40°C to +85°C
Temperature (storage)
-40°C to +115°C
Humidity
10% ~ 90%
Non-condensing
Note 1: Depends on modulation. Expand Spreading Factor (SF).
2: TX power is adjustable. For more information, refer to the “RN2903 LoRa® Technology Module Command
Reference User’s Guide” (DS40001811).
TABLE 2-2:
ELECTRICAL CHARACTERISTICS
Parameter
Supply Voltage
Min.
Typ.
Max.
Units
2.1
—
3.6
V
Voltage on any pin with respect to VSS (except VDD)
-0.3
—
VDD + 0.3
V
Voltage on VDD with respect to VSS
-0.3
—
3.9
V
Input Clamp Current (IIK) (VI < 0 or VI > VDD)
—
—
+/-20
mA
Output Camp Current (IOK) (VO < 0 or VO > VDD)
—
—
+/-20
mA
GPIO sink/source current each
—
—
25/25
mA
Total GPIO sink/source current
—
—
200/185
mA
RAM Data Retention Voltage (in Sleep mode or Reset state)
1.5
—
—
V
VDD Start Voltage to ensure internal Power-on Reset signal
—
—
0.7
V
VDD Rise Rate to ensure internal Power-on Reset signal
0.05
—
—
V/ms
Brown-out Reset Voltage
1.75
1.9
2.05
V
Logic Input Low Voltage
—
—
0.15 x VDD
V
Logic Input High Voltage
0.8 x VDD
—
—
V
Input Leakage at <25°C
(VSS<VPIN<VDD, Pin at high-impedance)
—
0.1
50
nA
Input Leakage at +60°C
(VSS<VPIN<VDD, Pin at high-impedance)
—
0.7
100
nA
Input Leakage at +85°C
(VSS<VPIN<VDD, Pin at high-impedance)
—
4
200
nA
RF Input Level
—
—
+10
dBm
DS50002390B-page 6
 2015 Microchip Technology Inc.
RN2903
TABLE 2-3:
CURRENT CONSUMPTION
Mode
Typical Current at 3V (mA)
Idle
2.7
RX
13.5
Deep Sleep
0.002
TABLE 2-4:
TABLE 2-5:
MODULE DIMENSIONS
Parameter
Value
Dimensions
17.8 x 26.7 x 3.34 mm
Weight
2.05g
 2015 Microchip Technology Inc.
OUTPUT POWER OF TX
POWER SETTING
TX Power
Setting
Output Power
(dBm)
Typical Supply
Current at 3V
(mA)
2
3.0
42.6
3
4.0
44.8
4
5.0
47.3
5
6.0
49.6
6
7.0
52.0
7
8.0
55.0
8
9.0
57.7
9
10.0
61.0
10
11.0
64.8
11
12.0
73.1
12
13.0
78.0
14
14.7
83.0
15
15.5
88.0
16
16.3
95.8
17
17.0
103.6
20
18.5
124.4
DS50002390B-page 7
RN2903
3.0
TYPICAL HARDWARE CONNECTIONS
Figure 3-1 shows the typical hardware connections.
FIGURE 3-1:
HARDWARE CONNECTIONS
915 MHz band
RFH
RN2903
Host MCU
TX
RX
RX
TX
CTS(1)
RTS
RTS(1)
CTS
UART
GPIOs
Status LEDs,
6witches,
/ogic IOs,
etc.
14
Note 1: Optional handshake lines ĂƌĞsupported in future firmware releases.
3.1
INTERFACE TO HOST MCU
The RN2903 module has a dedicated UART interface
to communicate with a host controller. Optional
handshake lines are supported in future firmware
releases. The “RN2903 LoRa® Technology Module
Command Reference User’s Guide” (DS40001811)
provides a detailed UART command description.
Table 3-1 shows the default settings for the UART
communication.
TABLE 3-1:
DEFAULT UART SETTINGS
Specification
Baud Rate
Description
57600 bps
Packet Length
8 bit
Parity Bit
No
Stop Bits
1 bit
Hardware Flow Control
No
3.2
3.3
RF CONNECTION
When routing RF path, use proper strip lines with an
impedance of 50 Ohm.
3.4
RESET PIN
The Reset pin of the module is an active-low logic
input.
3.5
POWER PINS
It is recommended to connect power pins (Pin 12 and
34) to a stable supply voltage with sufficient source
current. Table 2-3 shows the current consumption.
Additional filtering capacitors are not required but used
to ensure stable supply voltage in a noisy environment.
GPIO PINS (GPIO0–GPIO13)
The module has 14 GPIO pins. These lines can be
connected to switches, LEDs, and relay outputs. The
pins can be either logic inputs or outputs, and some
pins have analog input capability that can be accessed
via the module firmware. These pins have limited sink
and source capabilities. Electrical characteristics are
described in Table 2-2. For more information, see
“RN2903 LoRa® Technology Module Command
Reference User’s Guide” (DS40001811).
DS50002390B-page 8
 2015 Microchip Technology Inc.
RN2903
4.0
PHYSICAL DIMENSIONS
Figure 4-1 and Figure 4-2 illustrate the physical dimensions and the recommended PCB layout for the RN2903 module.
FIGURE 4-1:
RN2903 PHYSICAL DIMENSIONS
FIGURE 4-2:
RECOMMENDED PCB FOOTPRINT
Note:
Host PCB top layer copper traces must have solder mask to avoid shorting test pins on the bottom of the module.
 2015 Microchip Technology Inc.
DS50002390B-page 9
RN2903
5.0
APPLICATION INFORMATION
5.1
RF Trace Layout Design
The RN2903 modular transmitter is certified with a PCB edge SMA connector and micro-strip trace layout as shown in
Figure 5-1 and Figure 5-2. The left side RF path is not used for this module. The host PCB can follow these trace design
to maintain compliance under the modular grant (FCC) and certificate (IC). Gerber files are available on the RN2903
product web page at www.microchip.com/rn2903.
FIGURE 5-1:
RF TRACE ROUTING (TOP LAYER)
PCB Details:
Two layer, plated through hole
FR4
Thickness: 1.55 mm
Via stitching with 0.25 mm plated
Trace Dimensions:
Trace width: 0.75
Trace gap: 0.15
Finished Copper Weight: 1 ounce
Dimensions are in millimeters
FIGURE 5-2:
DS50002390B-page 10
RF TRACE ROUTING (BOTTOM LAYER)
 2015 Microchip Technology Inc.
RN2903
5.2
Approved Antennas
Modular certification of the RN2903 module is performed with the external antenna type in Table 5-1. For specific regulatory requirements by country, refer to Section 6.0 "Regulatory Approval".
TABLE 5-1:
TESTED EXTERNAL ANTENNA TYPES
Type
Sleeve Dipole
 2015 Microchip Technology Inc.
Gain (dBi)
6
DS50002390B-page 11
APPLICATION SCHEMATIC
RN2903
Figure 5-3 shows the schematic for the RN2903 PICtail™/PICtail Plus Daughter Board.
PICTAIL™/PICTAIL PLUS DAUGHTER BOARD SCHEMATIC
GND
CUR1
+3V3_M
RFH
1
2
3
4
5
6
SMA
+3V3
R1
CUR2
GND ID D+ D- +5V
GND
5 4X 3 2 1
0R
+3V3
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
+3V3_ext2
GP0
GP1
GP2
GP3
GP4
GP5
GP6
GP7
GP8
GP9
Socket 1.27 mm
GND
NC
TEST0
TEST1
RESET
GND
VDD
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GND
NC
GPIO6
GPIO7
GPIO8
GPIO9
GND
JP4
0603 0R
GND
GND
NC
NC
NC
NC
NC
GPIO10
GPIO11
VDD
GND
GPIO12
GPIO13
GND
UART_RX
UART_TX
RESERVED
RESERVED
UART_CTS
UART_RTS
GND
J1
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
GP10
GP11
+3V3_ext1
GP12
GP13
Module_RX
Module_TX
Module_CTS
Module_RTS
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C2
1uF
25V
0603
GND
220
1%
0603
Module_CTS
Module_RX
Module_TX
R6
Pgd
EN
1uF
25V
0603
1
C4
1.5k
1%
0603
C5
100nF
25V
0603
10uF
6.3V
0603
R3
C6
10nF
50V
0603
GND
GND
2.7k
1%
0603
GND
GND
USB_DET
GND
USB_DUSB_D+
IC2
PIC18LF25K50-I/ML
13
D+
12
D-
+3V3
C8
11
VUSB
17
Vdd
4.7uF
6.3V
0603
5,16
29
8
9
10
14
15
Vss
EP
ICSP_IC2
RA0/AN0/C12IN0RA1/AN1/C12IN1RA2/AN2/C2IN+/VrefRA3/AN3/C1IN+/VREF+
RA4/C1OUT/SRQ/T0CKI
RA5/AN4/C2OUT/SRNQ/HLVDIN/SS
RA6/OSC2/CLKO
RA7/OSC1/CLKI
RB0/AN12/SRI/FLT0/SDI/SDA/INT0
RB1/AN10/C12IN3-/P1C/SCK/SCL/INT1
RB2/AN8/CTED1/P1B/INT2
RB3/AN9/C12IN2-/CTED2/CCP2/SDO
RC0/SOSCO/T1CKI/T3CKI/T3G/IOCC0 RB4/AN11/P1D/IOCB4
RC1/CCP2/SOSCI/IOCC1
RB5/AN13/T1G/T3CKI/IOCB5
RC2/AN14/CTPLS/CCP1/P1A/IOCC2
RB6/IOCB6/PGC
RC6/AN18/TX/CK/IOCC6
RB7/IOCB7/PGD
RC7/RX/DT/SDO/IOCC7
MCLR/VPP/RE3
27
28
1
2
3
4
7
6
18
19
20
21
22
23
24
25
Pin 2.54 mm
+3V3
GND
R10
220
1%
0603
LD2
R9
Green
220
1%
0603
LD1
R7
Green
100
1%
0603
26
GND
Module_CTS
Module_RTS
Module_TX
0R
JPI
0603
1
3
5
7
9
11
13
15
17
19
21
23
25
27
Module_RTS
PT+_SENSE
GND
R2
C3
5
+3V3
Module_RX
+3V3
Module_RTS
+3V3
PICTail Plus
+5V_USB
R8
4.7k
1%
0603
PT+_SENSE
IC2_MCLR
Insert a short on this jumper to keep IC2 in reset state
while plugged in PICtail Plus socket
2
4
6
8
10
12
14
16
18
20
22
24
26
28
PT_Module_RX
PT_MCLR
PT_Module_CTS
PT_Module_CTS
+3V3
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
GND
+5V_D
JP_RST
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
 2015 Microchip Technology Inc.
Module_TX
PT_Module_RX
PT_Module_RESET
220
1%
0603
2
GND
GND
R5
Vin
GND
GND
220
1%
0603
Vout
C1
470nF
25V
0603
Socket 1.27 mm
U1
R4
GND
B0520LW-7-F
RN2903
GND
D1
MCP1825-3302E/DC
+3V3
0603
G
JP3
G
+3V3_M
0603
IC2_ICSP_MCLR
JP2
0603 0R
6
5
4
3
2
1
0R
IC2_ICSP_PGC
IC2_ICSP_PGD
+3V3_M
4
JP1
Gnd
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
+3V3
27
26
25
24
23
22
21
J2
IC1
GND
GND
NC
GND
RF
GND
GND
GND
Note:
USB
1
1%
0603
GND
Module_RESET
Pin 2.54 mm right angle
Current measure points
50 Ohm
i
+3V3
TEST
3,6
FIGURE 5-3:
1
DS50002390B-page 12
5.3
PICTail
Pin 2.54 mm right angle (PBC14DBDN)
GND
Shaded components are not populated by default.
RN2903
6.0
REGULATORY APPROVAL
This section outlines the regulatory information for the
RN2903 module for the following countries:
•
•
•
•
United States
Canada
Australia
New Zealand
6.1
United States
he RN2903 module has received Federal
Communications
Commission
(FCC)
CFR47
Telecommunications, Part 15 Subpart C “Intentional
Radiators” modular approval in accordance with Part
15.212 Modular Transmitter approval. Modular
approval allows the end user to integrate the RN2903
module into a finished product without obtaining
subsequent and separate FCC approvals for
intentional radiation, 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 finished product is required to comply with all
applicable FCC equipment authorizations regulations,
requirements and equipment functions not associated
with the transmitter module portion. For example,
compliance must be demonstrated to regulations for
other transmitter components within the host product;
to requirements for unintentional radiators (Part 15
Subpart B “Unintentional Radiators”), such as digital
devices, computer peripherals, radio receivers, etc.;
and to additional authorization requirements for the
non-transmitter functions on the transmitter module
(i.e., Verification, or Declaration of Conformity) (e.g.,
transmitter modules may also contain digital logic
functions) as appropriate.
6.1.1
LABELING AND USER
INFORMATION REQUIREMENTS
The RN2903 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
as follows:
Contains Transmitter Module FCC ID: T9JRN2903
or
Contains FCC ID: T9JRN2903
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.
A user's manual for the finished product should include
the following statement:
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 into 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.
Additional information on labeling and user information
requirements for Part 15 devices can be found in KDB
Publication 784748 available at the FCC Office of
Engineering and Technology (OET) Laboratory
Division Knowledge Database (KDB)
https://apps.fcc.gov/oetcf/kdb/index.cfm.
 2015 Microchip Technology Inc.
DS50002390B-page 13
RN2903
6.1.2
RF EXPOSURE
All transmitters regulated by FCC must comply with RF
exposure requirements. KDB 447498 General RF
Exposure Guidance provides guidance 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).
From the RN2903 FCC Grant: Output power listed is
conducted. This grant is valid only when the module is
sold to OEM integrators and must be installed by the
OEM or OEM integrators. This transmitter is restricted
for use with the specific antenna(s) tested in this
application for Certification and must not be co-located
or operating in conjunction with any other antenna or
transmitters within a host device, except in accordance
with FCC multi-transmitter product procedures.
6.1.3
APPROVED EXTERNAL ANTENNA
TYPES
To maintain modular approval in the United States, only
the antenna types that have been tested shall be used.
It is permissible to use different antenna manufacturer
provided the same antenna type and antenna gain
(equal to or less than) is used.
Testing of the RN2903 module was performed with the
antenna types listed in Table 5-1 Tested External
Antenna Types.
6.1.4
HELPFUL WEB SITES
Federal Communications Commission (FCC):
http://www.fcc.gov
FCC Office of Engineering and Technology (OET)
Laboratory Division Knowledge Database (KDB):
https://apps.fcc.gov/oetcf/kdb/index.cfm
6.2
Canada
The RN2903 module has been certified for use in
Canada under Industry Canada (IC) Radio Standards
Specification (RSS) RSS-210 and RSS-Gen. Modular
approval permits the installation of a module in a host
device without the need to recertify the device.
6.2.1
LABELING AND USER
INFORMATION REQUIREMENTS
Labeling Requirements for the Host Device (from
Section 3.2.1, RSS-Gen, Issue 3, December 2010):
The host device shall be properly labeled to identify the
module within the host device.
The Industry Canada certification label of a module
shall be clearly visible at all times when installed in the
host device, otherwise the host device must be labeled
to display the Industry Canada certification number of
DS50002390B-page 14
the module, preceded by the words “Contains
transmitter module”, or the word “Contains”, or similar
wording expressing the same meaning, as follows:
Contains transmitter module IC: 6514A-RN2903.
User Manual Notice for License-Exempt Radio
Apparatus (from Section 7.1.3 RSS-Gen, Issue 3,
December 2010): User manuals for license-exempt
radio apparatus shall contain the following or
equivalent notice in a conspicuous location in the user
manual or alternatively on the device or both:
This device complies with Industry Canada licenseexempt RSS standard(s). Operation is subject to the
following two conditions: (1) this device may not
cause interference, and (2) this device must accept
any interference, including interference that may
cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts
de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire
de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si
le brouillage est susceptible d'en compromettre le
fonctionnement.
Transmitter Antenna (from Section 7.1.2 RSS-Gen,
Issue 3, December 2010): User manuals for
transmitters shall display the following notice in a
conspicuous location:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type
and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio
interference to other users, the antenna type and its
gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that
necessary for successful communication.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec
une antenne d'un type et d'un gain maximal (ou
inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il
faut choisir le type d'antenne et son gain de sorte que
la puissance isotrope rayonnée équivalente (p.i.r.e.)
ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
The above notice may be affixed to the device instead
of displayed in the user manual.
 2015 Microchip Technology Inc.
RN2903
User manuals for transmitters equipped with
detachable antennas shall also contain the following
notice in a conspicuous location:
This radio transmitter (identify the device by certification number, or model number if Category II) has been
approved by Industry Canada to operate with the
antenna types listed below with the maximum permissible gain and required antenna impedance for each
antenna type indicated. Antenna types not included in
this list, having a gain greater than the maximum gain
indicated for that type, are strictly prohibited for use
with this device.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec
une antenne d'un type et d'un gain maximal (ou
inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il
faut choisir le type d'antenne et son gain de sorte que
la puissance isotrope rayonnée équivalente (p.i.r.e.)
ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
Immediately following the above notice, the
manufacturer shall provide a list of all antenna types
approved for use with the transmitter, indicating the
maximum permissible antenna gain (in dBi) and
required impedance for each.
6.2.2
APPROVED EXTERNAL ANTENNA
TYPES
Transmitter Antenna (from Section 7.1.2 RSS-Gen,
Issue 3, December 2010):
The RN2903 module can only be sold or operated with
antennas with which it was approved. Transmitter may
be approved with multiple antenna types. An antenna
type comprises antennas having similar in-band and
out-of-band radiation patterns. Testing shall be
performed using the highest gain antenna of each
combination of transmitter and antenna type for which
approval is being sought, with the transmitter output
power set at the maximum level. Any antenna of the
same type having equal or lesser gain as an antenna
that had been successfully tested with the transmitter,
will also be considered approved with the transmitter,
and may be used and marketed with the transmitter.
Testing of the RN2903 module was performed with the
antenna types listed in Table 5-1 Tested External
Antenna Types.
6.2.3
HELPFUL WEB SITES
Industry Canada: http://www.ic.gc.ca/
6.3
Australia
RN2903 module RF transmitter test reports can be
used in part to demonstrate compliance in accordance
with ACMA Radio communications "Short Range
Devices" Standard 2004 (The Short Range Devices
standard calls up the AS/NZS 4268:2008 industry
standard). The MRF89XAM9A module test reports can
be used as part of the product certification and
compliance folder. For more information on the RF
transmitter test reports, contact Microchip Technology
Australia office.
AS/NZS 4268:2008 refers to the USA FCC 15.247 RF
standards, the frequency limits of 915 - 928 MHz apply
in Australia.
To meet overall Australian end product compliance, the
integrator must construct a compliance folder
containing all relevant compliance test reports e.g. RF,
EMC, electrical safety and DoC (Declaration of
Conformity) etc. It is the responsibility of the integrator
to know what is required in the compliance folder for
ACMA compliance. For more information on Australia
compliance, refer to the Australian Communications
and Media Authority web site http://www.acma.gov.au/.
6.3.1
HELPFUL WEB SITES
The Australian Communications and Media Authority:
http://www.acma.gov.au/
When a measurement at the antenna connector is
used to determine RF output power, the effective gain
of the device's antenna shall be stated, based on
measurement or on data from the antenna
manufacturer. For transmitters of output power greater
than 10 milliwatts, the total antenna gain shall be added
to the measured RF output power to demonstrate
compliance to the specified radiated power limits.
 2015 Microchip Technology Inc.
DS50002390B-page 15
RN2903
6.4
New Zealand
RN2903 module RF transmitter test reports can be
used in part to demonstrate compliance against the
New Zealand "General User Radio License for Short
Range Devices". New Zealand Radio communications
(Radio Standards) Notice 2010 calls up the AS / NZS
4268:2008 industry standard. The RN2903 module test
reports can be used as part of the product certification
and compliance folder. For more information on the RF
transmitter test reports, contact Microchip Technology.
Information on the New Zealand short range devices
license can be found in the following web links:
http://www.rsm.govt.nz/cms/licensees/types-oflicence/
general-user-licences/short-range-devices
and
http://www.rsm.govt.nz/about-rsm/spectrum-policy
While the AS /NZS 4268:2008 refers to the USA FCC
15.247 and EN 300 220-1 V2.3.1 RF standards, the
frequency limits of 921 MHz to 928 MHz apply in New
Zealand.
To meet overall New Zealand end product compliance,
the developer must construct a compliance folder
containing all relevant compliance test reports e.g. RF,
EMC, electrical safety and DoC (Declaration of
Conformity) etc. It is the responsibility of the developer
to know what is required in the compliance folder for
New Zealand Radio communications. For more
information on New Zealand compliance, refer to the
web site http://www.rsm.govt.nz/.
6.4.1
HELPFUL WEB SITES
Radio Spectrum Ministry of Economic Development:
http://www.rsm.govt.nz/
DS50002390B-page 16
 2015 Microchip Technology Inc.
RN2903
APPENDIX A:
REVISION HISTORY
Revision A (July 2015)
This is the initial release of this document.
Revision B (December 2015)
This revision includes the following updates:
• Updated Deep Sleep value in Table 2-3 "Current
Consumption".
• Updated Dimensions value in Table 2-4 "Module
Dimensions".
• Updated Figure 4-1.
• Updated Figure 4-2.
• Updated Figure 5-2.
• Updated information for Section 5.1 “RF Trace
Layout Design”.
 2015 Microchip Technology Inc.
DS50002390B-page 17
RN2903
NOTES:
DS50002390B-page 18
 2015 Microchip Technology Inc.
RN2903
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
Users of Microchip products can receive assistance
through several channels:
• Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
• General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
• Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers
should
contact
their
distributor,
representative or Field Application Engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical support is available through the web site
at: http://microchip.com/support
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
 2015 Microchip Technology Inc.
DS50002390B-page 19
RN2903
NOTES:
DS50002390B-page 20
 2015 Microchip Technology Inc.
RN2903
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
I
RM
Device
Temperature
Range
Package
XXX
Firmware
Revision
Number
Device:
RN2903:
Low-Power Long Range LoRa® Technology
Transceiver module
Temperature Range:
I
=
-40C to +85C (Industrial)
Package:
RM
=
Radio Module
 2015 Microchip Technology Inc.
Examples:
RN2903-I/RM:
Industrial temperature
DS50002390B-page 21
RN2903
NOTES:
DS50002390B-page 22
 2015 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights unless otherwise stated.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
SST, SST Logo, SuperFlash and UNI/O are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
The Embedded Control Solutions Company and mTouch are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O,
Total Endurance, TSHARC, USBCheck, VariSense,
ViewSpan, WiperLock, Wireless DNA, and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology
Germany II GmbH & Co. KG, a subsidiary of Microchip
Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2015, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN: 978-1-5224-0102-5
QUALITYMANAGEMENTSYSTEM
CERTIFIEDBYDNV
== ISO/TS16949==
 2015 Microchip Technology Inc.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS50002390B-page 23
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
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Tel: 86-592-2388138
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Tel: 86-756-3210040
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Tel: 45-4450-2828
Fax: 45-4485-2829
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Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
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Tel: 678-957-9614
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Tel: 852-2943-5100
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Fax: 61-2-9868-6755
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Fax: 82-2-558-5932 or
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Tel: 49-89-627-144-0
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Germany - Pforzheim
Tel: 49-7231-424750
Italy - Milan
Tel: 39-0331-742611
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Tel: 39-049-7625286
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Poland - Warsaw
Tel: 48-22-3325737
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07/14/15
DS50002390B-page 24
 2015 Microchip Technology Inc.