User's Manual
Table Of Contents
- Low-Power Long Range (LoRa®) Technology Gateway Module for US (LG9271) and EU (LG8271)
- 1.0 Device Overview
- 2.0 General Specifications
- TABLE 2-1: General Specification
- TABLE 2-2: Electrical Characteristics
- TABLE 2-3: RF Receiver Characteristics
- TABLE 2-4: LoRa Technology Data Rate (bps) and Sensitivity versus Spreading Factor (SF)
- TABLE 2-5: CURRENT CONSUMPTION (3.3V)
- TABLE 2-6: Module Dimensions
- TABLE 2-7: RF OUTPUT POWER (dBm) versus TX POWER SETTING (nominal)
- 3.0 Typical Hardware Connections
- 4.0 Application Information
- 5.0 Regulatory Approval
- Appendix A: Revision History
- Worldwide Sales and Service
LG8271/LG9271
DS00000000A-page 8 Preliminary 2017 Microchip Technology Inc.
Input Leakage at +60°C (VSS<VPIN<VDD, Pin
at high-impedance)
—0.7100nA
RF Input Level — 0 +6 dBm
TABLE 2-2: ELECTRICAL CHARACTERISTICS (CONTINUED)
Parameter Min. Typ. Max. Units
TABLE 2-3: RF RECEIVER CHARACTERISTICS
Descriptions Conditions Typ Unit
LoRa Technology sensitivity at
SF12 : IF8 path
BW = 125 kHz
BW = 250 kHz
BW = 500 kHz
-140
-137
-134
dBm
LoRa Technology sensitivity at
SF12 : IF0 to 7 paths
BW = 125 kHz -140 dBm
Receiver CW interferer rejection at
1Mhz offset at SF12
BW = 125 kHz +80 dB
Co-channel rejection at SF12 Wanted signal 10 dB
above sensitivity
+25 dB
LoRa Technology sensitivity at
SF7 : IF8 path
BW = 125 kHz
BW = 250 kHz
BW = 500 kHz
-126
-123
-120
dBm
LoRa Technology sensitivity at
SF7 : IF0 to 7 paths
BW = 125 kHz -126 dBm
Receiver CW interferer rejection at
1 Mhz offset
BW = 125 kHz +70 dB
Co-channel rejection at SF7 Wanted signal 10 dB
above sensitivity
+9 dB
FSK sensitivity FDev = 50 kHz,
Bit Rate = 100 kb/s
-103 dBm
Bit rate FSK
(1)
Programmable 1.2 to 100 kbps
Frequency deviation (FDev), FSK Programmable 0.6 to 200 kHz
Note 1: Bit rate limited by: FDev + Bit Rate/2 < 250 kHz
TABLE 2-4: LoRa TECHNOLOGY DATA RATE (BPS) AND SENSITIVITY VERSUS SPREADING
FACTOR (SF)
SF
125 kHz 250 kHz
(1)
500 kHz
(1)
Data Rate Sensitivity Data Rate Sensitivity Data Rate Sensitivity
7 5496 -130.0 10938 -127.0 21875 -124.0
8 2125 -132.5 6250 -129.5 12500 -126.5
9 1758 -135.0 3516 -132.0 7031 -129.0
10 977 -137.5 1953 -134.5 3906 -131.5
11 537 -140.0 1074 -137.0 2148 -134.0
12 293 -142.5 586 -139.5 1172 -136.5
Note 1: 250 kHz and 500 kHz LoRa Technology bandwidths are available only on IF8.