RN2903A-I/RM105

RN2903 Low-Power Long Range LoRa® Technology Transceiver Module 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) - Taiwan • 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, Shared with 13 Analog Inputs 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  2015-2021 Microchip Technology Inc. General 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 and Class C protocol specifications. It integrates RF, a baseband controller and 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) DS50002390K-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 ...................................................................................................................................................................10 5.0 Application Information ............................................................................................................................................................... 11 6.0 Regulatory Approval....................................................................................................................................................................14 Appendix A: Revision History................................................................................................................................................................19 The Microchip WebSite.........................................................................................................................................................................21 Customer Change Notification Service.................................................................................................................................................21 Customer Support.................................................................................................................................................................................21 Product Identification System ...............................................................................................................................................................23 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 products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors@microchip.com. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Website 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: • Microchip’s Worldwide Website; http://www.microchip.com • 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. Customer Notification System Register on our website at www.microchip.com to receive the most current information on all of our products. DS50002390K-page 2  2015-2021 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 the 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 industryleading 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 PGC_INT 31 PGD_INT 32 RESET 33 GND GND 20 NC 19 NC 18 NC 17 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 RESERVED 5 RESERVED 4 42 NC 43 GPIO6 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 /R5D:$170 Protocol Stack 14 GPIO Pins I2C RealTime Clock SPI EUI-64 EEPROM 32768 Hz Crystal LoRa® Technology Radio User Hardware: Status LEDs, 6witches, /ogic IOs, etc.  2015-2021 Microchip Technology Inc. Antenna 915 MHz DS50002390K-page 3 RN2903 Table 1-1 describes the RN2903 pins. TABLE 1-1: Pin PIN DESCRIPTION Name Type Description 1 GND Power Ground supply terminal 2 UART_RTS Output Communication UART RTS signal(1) or GPIO 3 UART_CTS Input Communication UART CTS signal(1) or GPIO 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 or analog input 10 GPIO12 Input/Output General purpose I/O pin or analog input 11 GND Power Ground supply terminal 12 VDD Power Positive supply terminal 13 GPIO11 Input/Output General purpose I/O pin or analog input 14 GPIO10 Input/Output General purpose I/O pin or analog input 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 PGC_INT Input/Ouput Internal MCU ICSP program clock or general purpose I/O pin 31 PGD_INT Input/Ouput Internal MCU ICSP program data or general purpose I/O pin 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 or analog input 36 GPIO1 Input/Output General purpose I/O pin or analog input 37 GPIO2 Input/Output General purpose I/O pin or analog input 38 GPIO3 Input/Output General purpose I/O pin or analog input 39 GPIO4 Input/Output General purpose I/O pin 40 GPIO5 Input/Output General purpose I/O pin or analog input 41 GND Power Ground supply terminal 42 NC — Not connected 43 GPIO6 Input/Output General purpose I/O pin or analog input DS50002390K-page 4  2015-2021 Microchip Technology Inc. RN2903 TABLE 1-1: Pin PIN DESCRIPTION (CONTINUED) Name Type Description 44 GPIO7 Input/Output General purpose I/O pin or analog input 45 GPIO8 Input/Output General purpose I/O pin or analog input 46 GPIO9 Input/Output General purpose I/O pin or analog input 47 GND Power Ground supply terminal Note 1: Optional handshake lines are supported in future firmware releases.  2015-2021 Microchip Technology Inc. DS50002390K-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 TABLE 2-1: dimensions of the module, respectively. Table 2-5 shows the RF output power calibration data. Table 2-6 shows the RF output power at different supply voltages and temperatures. 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 (castellated PCB pads for reliable soldering) Interface UART Operation Range Up to 15 km coverage at suburban; up to 5 km coverage at urban area(2) Sensitivity at 1% PER -146 dBm(1) RF TX Power Adjustable up to max. +18.5 dBm on 915 MHz band(3) Generated Conductive Harmonics Level Below -70 dBm Temperature (operating) -40°C to +85°C Temperature (storage) -40°C to +115°C Humidity 10% ~ 90% non-condensing Note 1: Dependent on modulation settings, Receiver Bandwidth (RBW) and Spreading Factor (SF). 2: Subject to environmental conditions. 3: 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 and RESET) -0.3 — VDD + 0.3 V Voltage on VDD with respect to VSS -0.3 — 3.9 V Voltage on RESET with respect to VSS 0 — +11 V Input Clamp Current (IIK) (VI < 0 or VI > VDD) — — +/-20 mA Output Clamp 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