RAK2247 WisLink LPWAN Concentrator Datasheet

Overview

Description

NOTE

To address the chip shortage and not disrupt the operations of the customers and partners, the RAK2247 SPI is available with SX1308 core. It can completely replace the RAK2247 with SX1301. The only difference is the operating temperature. For more information, check the RAK2247 Operating Conditions.

The RAK2247 WisLink LPWAN Concentrator is a LoRa Concentrator module with mini-PCIe form factor based on the SX1301. This enables easy integration into routers and other networking equipment, adding gateway capabilities. The module can be used in any embedded platform offering a mini-PCIe slot with an SPI or USB connection.

Despite its small size, this is an 8 channel concentrator module. By integrating it together with a computing core a fully fledged gateway solution can easily be created.

Features

• Mini PCIe form factor, mounted heat-sink
• SX1301 base band processor emulates 49 x LoRa demodulators, 10 parallel demodulation paths. It supports 8 uplinks channels and 1 downlink channel
• 2 x SX125x Tx/Rx front-ends high/low frequency
• Built-in FT2232H for SPI to USB 2.0 conversion (optional)
• Operates at 3.3 V, making it compatible with standard 3G/LTE card slots of Mini PCI-e type
• Tx power up to 27 dBm, Rx sensitivity down to -139 dBm @ SF12, BW 125 kHz
• Supports global license-free frequency band (EU433, CN470, IN865, EU868, US915, AU915, KR920, and AS923)

Specifications

Overview

The overview shows the top and back views of the RAK2247 board. It also presents the block diagram that discusses how the board works.

Board Overview

The outer dimension of the RAK2247 WisLink LPWAN Concentrator is 50.95 x 30.0 x 10.4 mm. The board with top-side and bottom-side keep-out areas, and all other dimensions are defined by PCI Express Mini Card Electromechanical Specification except for the card thickness. The 10.4 mm thickness includes the 8 mm heat sink.

Figure 1: RAK2247 WisLink LPWAN Concentrator Overview

Block Diagram

RAK2247 WisLink LPWAN Concentrator integrates one SX1301 chip and two SX1255/7. The other chip is for RF signal, which represents the core of the device. This provides the related LoRa modem and processing functionalities. Additional signal conditioning circuitry is implemented for PCI Express Mini Card compliance, and one uFL connector is available for external antennas integration.

Figure 1: RAK2247 WisLink LPWAN Concentrator Block Diagram

Hardware

The hardware is categorized into six (6) parts. It discusses the interfacing, pinouts and its corresponding functions and diagrams. It also covers the parameters and standard values of the board.

NOTE

Detailed electrical and RF testing results can be found on RAK2247 Hardware Test Report.

Interface

Power Supply

RAK2247 WisLink LPWAN Concentrator must be supplied through the 3.3 Vaux pins by a DC power supply. The voltage must be stable, because during this operation the current drawn from 3.3 Vaux can vary significantly, based on the power consumption profile of the SX1301 chip (see SX1301 DS datasheet).

SPI Interface

SPI interface is provided on the PCIe_SCK, PCIe_MISO, PCIe_MOSI, PCIe_CSN pins of the system connector. The SPI interface gives access to the configuration register of SX1301 via a synchronous full-duplex protocol. Only the slave side is implemented.

NOTE

RAK2247-USB version does not have this interface.

USB Interface

RAK2247 WisLink LPWAN Concentrator can support the high speed USB to SPI by FT2232HL, it includes a USB 2.0 compliant interface with a maximum 480 Mbps data rate, representing the interface for any communication with an external host application processor. The module itself acts as a USB device and can be connected to any USB host equipped with compatible drivers. For more information, refer to the datasheet of FT2232HL.

NOTE

RAK2247-SPI version does not have this interface.

GPS_PPS

RAK2247 WisLink LPWAN Concentrator includes the GPS_PPS input for received packets time-stamped.

RESET

RAK2247 WisLink LPWAN Concentrator includes the RESET active-high input signal to reset the radio operations as specified by the SX1301 Specification.

LEDs

Three (3) Green LED for indicating the status of PWR, TX, RX.

Antenna RF Interface

The modules have one RF interface over a standard uFL connector (Hirose U. FL-RSMT) with a characteristic impedance of 50 Ω. The RF port (J1) supports both Tx and Rx, providing the antenna interface.

Pin Definition

Figure 1: RAK2247 WisLink LPWAN Concentrator Pinout Diagram

Pin No.	Mini PCIEx Pin Rev. 2.0	RAK2247 Pin	Power	I/O	Description	Remarks
1	WAKE#	NC		N/A		Internally not connected
2	3.3Vaux	3.3Vaux	3.3Vaux	N/A	RAK2247 Power Supply Input	Connect to 3.3 V
3	COEX1	NC		N/A		Internally not connected
4	GND	GND	GND	N/A	Ground	Connect to ground
5	COEX2	NC		N/A		Internally not connected
6	1.5V	NC		N/A		Internally not connected
7	CLKREQ#	NC		N/A		Internally not connected
8	UIM_PWR	NC		N/A		Internally not connected
9	GND	GND	GND	N/A	Ground	Connect to ground
10	UIM_DATA	NC		N/A		Internally not connected
11	REFCLK-	NC		N/A		Internally not connected
12	UIM_CLK	NC		N/A		Internally not connected
13	REFCLK+	NC		N/A		Internally not connected
14	UIM_RESET	NC		N/A		Internally not connected
15	GND	GND	GND	N/A	Ground	Connect to ground
16	UIM_SPU	NC		N/A		Internally not connected
17	UIMIC DM	NC (5 V Optional For PA)		N/A		Internally not connected
18	GND	GND	GND	N/A	Ground	Connect to ground
19	GPS_PPS	1PPS		N/A		Internal connection GPS_PPS for SX1301
20	W_DISABLE1#	NC		N/A		Internally not connected
21	GND	GND	GND	N/A	Ground	Connect to ground
22	PERST#	RESET		I	RAK2247 reset input	Active high (≥100 ns) for SX1301 reset.
23	PERn0	NC		N/A		Internally not connected
24	3.3Vaux	3.3Vaux	3.3Vaux	I	RAK2247 supply input	Connect to 3.3 V
25	PERp0	NC		N/A		Internally not connected
26	GND	GND	GND	N/A	Ground	Connect to ground
27	GND	GND	GND	N/A	Ground	Connect to ground
28	1.5V	NC		N/A		Internally not connected
29	GND	GND	GND	N/A	Ground	Connect to ground
30	SMB_CLK	NC		N/A		Internally not connected
31	PETn0	NC		N/A		Internally not connected
32	SMB_DATA	NC		N/A		Internally not connected
33	PETp0	NC		N/A		Internally not connected
34	GND	GND	GND	N/A	Ground	Connect to ground
35	GND	GND	GND	N/A	Ground	Connect to ground
36	USB_D-	USB_D-	USB	I/O	USB Data Line D-	90Ω nominal differential impedance. Pull-up, pull-down and series resistors as required by USB 2.0 specifications are part of the USB pin driver and need not be provided externally.
37	GND	GND	GND	N/A	Ground	Connect to ground
38	USB_D+	USB_D+	USB	I/O	USB Data Line D+	90Ω nominal differential impedance. Pull-up, pull-down and series resistors as required by USB 2.0 specifications are part of the USB pin driver and need not be provided externally.
39	3.3Vaux	3.3Vaux	3.3Vaux	I	RAK2247 supply input	Connect to 3.3 V
40	GND	GND	GND	N/A	Ground	Connect to ground
41	3.3Vaux	3.3Vaux	3.3Vaux	I	RAK2247 supply input	Connect to 3.3 V
42	LED_WWAN#	NC		N/A		Internally not connected
43	GND	GND	GND	N/A	Ground	Connect to ground
44	LED_WLAN#	NC		N/A		Internally not connected
45	Reserved	PCIe_SCK		I/O	Host SPI CLK	Max 10 MHz clock
46	LED_WPAN#	NC		N/A		Internally not connected
47	Reserved	PCIe_MISO		I/O	Host SPI MISO
48	1.5V	NC		N/A		Internally not connected
49	Reserved	PCIe_MOSI		I/O	Host SPI MOSI
50	GND	GND	GND	N/A	Ground	Connect to ground
51	W_DISABLE2#	PCIe_CSN		I/O	Host SPI CS
52	3.3Vaux	3.3Vaux	3.3Vaux	I	RAK2247 supply input	Connect to 3.3 V

RF Characteristics

Operating Frequencies

The board supports the following LoRaWAN frequency channels, allowing easy configuration while building the firmware from the source code.

Region	Frequency (MHz)
Europe	EU433, EU868
China	CN470
North America	US915
Asia	AS923
Australia	AU915
Korea	KR920
Indian	IN865

RF Characteristics

The following table gives typical sensitivity level of the RAK2247 WisLink LPWAN Concentrator.

Signal Bandwidth [KHz]	Spreading Factor	Sensitivity [dBm]
125	12	-139
125	7	-125
250	12	-136
250	7	-123
500	12	-134
500	7	-120

Electrical Requirements

Exceeding the device's rating on one or more listed in the Absolute Maximum Rating section may cause permanent damage. These are stress ratings only. Operating the module at these or at any conditions other than those specified in the Operating Conditions sections of the specification should be avoided. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. The operating condition range defines those limits within which the functionality of the device is guaranteed. Where application information is given, it is advisory only and does not form part of the specification.

Absolute Maximum Rating

Limiting values given below are in accordance with the Absolute Maximum Rating System (IEC 134)

Symbol	Description	Condition	Min.	Max.
3.3Vaux	Module supply voltage	Input DC voltage at 3.3Vaux pins	–0.3 V	3.6 V
USB	USB D+/D- pins	Input DC voltage at USB interface pins	-	3.6 V
RESET	RAK2247 reset input	Input DC voltage at RESET input pin	–0.3 V	3.6 V
SPI	SPI interface	Input DC voltage at SPI interface pin	–0.3 V	3.6 V
GPS_PPS	GPS 1 pps input	Input DC voltage at GPS_PPS input pin	–0.3 V	3.6 V
Rho_ANT	Antenna ruggedness	Output RF load mismatch ruggedness at ANT1	-	10:1 VSWR
Tstg	Storage Temperature	-	–40° C	85° C

warning

The product is not protected against over voltage or reversed voltages. If necessary, voltage spikes exceeding the power supply voltage specification, given in table above, must be limited to values within the specified boundaries by using appropriate protection devices.

Maximum ESD

The table below lists the maximum ESD.

Parameter	Min	Typical	Max	Remarks
ESD sensitivity for all pins except ANT1			1000 V	Human Body Model according to JESD22-A114
ESD sensitivity for ANT1			1000 V	Human Body Model according to JESD22-A114
ESD immunity for ANT1			4000 V	Contact Discharge according to IEC 61000-4-2
			8000 V	Air Discharge according to IEC 61000-4-2

NOTE

RAK2247 WisLink LPWAN Concentrator is an Electrostatic Sensitive Device and require special precautions when handling.

Power Consumption

Mode	Condition	Min.	Typical	Max.
Active-Mode(TX)	The power of TX channel is 25 dBm and 3.3 V supply.		789 mA
Active-Mode(RX)	TX disabled and RX enabled.		422 mA

Power Supply Range

The table below lists the power supply range.

Input voltage at 3.3Vaux must be above the normal operating range minimum limit to switch-on the module.

Symbol	Parameter	Min.	Typical	Max.
3.3Vaux	Module supply operating input voltage14	3 V	3.3 V	3.6 V

Environmental Requirements

Operating Conditions

The table below lists the operation temperature range.

Parameter	Min.	Typical	Max.	Remarks
Normal operating temperature (RAK2247-SX1301)	-40° C	+25° C	+85° C	Normal operating temperature range (fully functional and meet 3GPP specifications)
Normal operating temperature (RAK2247-SX1308)	0° C	-	70° C	Normal operating temperature range (fully functional and meet 3GPP specifications)

NOTE

Unless otherwise indicated, all operating condition specifications are at an ambient temperature of 25° C. Operation beyond the operating conditions is not recommended and extended exposure beyond them may affect device reliability.

Schematic Diagram

RAK2247 card refers to Semtech's reference design of SX1301. The SPI interface or USB interface converts SPI to USB2.0 by FT2232H and can be used on PCIE connector.

Figure 1: RAK2247 Schematic Diagram

Figure 5 shows the minimum application schematic of the RAK2247 card. You should use it at least 3.3 V / 1 A DC power, connect the SPI interface or USB interface to the main processor.

Figure 1: RAK2247 Card Minimum Schematic Reference

Firmware

Model	Raspberry Pi Board	Firmware Version	Source
RAK2247 - SPI	Raspberry Pi 3B+, 4	V4.2.6R	Download
RAK2247 - USB	Raspberry Pi 3B+, 4	V4.2.6R	Download

Models / Bundles

Order Information

Part Number	Description
RAK2247-01-R01	SPI-EU433
RAK2247-02-R01	SPI-CN470
RAK2247-03-R01	SPI-EU868
RAK2247-04-R01	SPI-915
RAK2247-05-R01	SPI-KR920
RAK2247-06-R01	SPI-AS923
RAK2247-07-R01	SPI-IN865
RAK2247-11-R01	USB-EU433
RAK2247-12-R01	USB-CN470
RAK2247-13-R01	USB-EU868
RAK2247-14-R01	USB-915
RAK2247-15-R01	USB-KR920
RAK2247-16-R01	USB-AS923
RAK2247-17-R01	USB-IN865

Certification

CE Certification

FCC Certification

ISED Certification

KC Certification

RCM Certification

REACH Certification

RoHS Certification