Download VT-DTMAA5-433

VT-SX1278-433M RF Module
User’s guide
V-Chip Microsystems, Inc
Add：6 floor, Longtang Building, Nan Shan Cloud Valley Innovation Industrial
Park, No.1183, Liuxian Road, Nanshan District, Shenzhen city
Tel：86-755-88844812
Fax：86-755-22643680
E-mail：[email protected]
ZIP：518055
Web：www.digiRF.com
VT-SX1278-433M
Overview
VT-SX1278-433M RF module is designed base on chip SX1278 which come from SEMTCH. It support
both high performance FSK/OOK mode and long range LoRa mode. The LoRa mode provides ultra-long range
communication and high interference immunity while minimizing current consumption.
Thanks to its ultra low power feature, the module is extremely suitable for the battery power systems. And
thanks to its small size, the module can be easily installed in existing systems without any external circuits.
Key Features
● 433MHz transceiver, customize from 137MHz to 525MHz
● Programmable modulation: FSK/OOK/LoRa
● Programmable output power from -2dBm to +20dBm
● Sensitivity down to -148dBm
● Programmable bit rate from 18bps to 300kpbs
● Preamble detection
● 127dB dynamic range RSSI
● Automatic RF sense and CAD with ultra-fast AFC
● FSK, GFSK, MSK, GMSK, LoRa TM and OOK modulation
● Built-in bit synchronizer for clock recovery
● Preamble detection
● 127 dB Dynamic Range RSSI
● Automatic RF Sense and CAD with ultra-fast AFC
● Packet engine up to 256 bytes with CRC
● Built-in temperature sensor and low battery indicator
● Voltage from 1.8V to 3.7V DC
Applications
● Automated Meter Reading.
● Home and Building Automation.
● Wireless Alarm and Security Systems.
● Industrial Monitoring and Control
● Long range Irrigation System
Copyright：@2016 V-Chip Microsystems, Inc
Revision：v1.0.0
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VT-SX1278-433M
Specification
Conditions：Ta=25℃，VCC=3.3V
Item
Value
Condition/Note
Frequency
428MHz~438MHz
Programmable
Frequency Error
±10ppm
Modulation
FSK/OOK/LORA
Programmable
Data Rate
18bps~300kbps
Programmable
Output Power
-2dBm ~ +20dBm
Programmable
Sensitivity
-148dBm
@LoRa，SF=12，BW=7.8kHz
Tx Current
140mA
@+20dBm
Rx Current
14mA
Max value
Standby Current
0.2uA
Sleep Mode
Distance
2000 meters
@0.8kbps, +20dBm power, open area
Operate Humidity
10% ~ 90%
Operate Temperature
-40℃~85℃
Input Voltage
1.8V~37V DC
Size
20.5×15.5×2.0mm
Copyright：@2016 V-Chip Microsystems, Inc
±100mV
Revision：v1.0.0
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VT-SX1278-433M
Package and Size
Pins Description
Pin
Type
Description
VDD
VDD
1.8V~3.7V DC
GND
GND
Ground
RST
Reset
Reset
RXTX_RF
O
Rx/Tx switch control: high in Tx
SCK
I
SPI Clock input
MOSI
I
SPI Data input
MISO
O
SPI Data output
NSS
I
SPI Chip select input
DIO_xx
GPIOs
General purpose input output
ANT
Antenna
50ohm
Other Source
1. We offer sample code and supports to save user’s developing time.
2. More source can be found on the website www.semtech.com..
Copyright：@2016 V-Chip Microsystems, Inc
Revision：v1.0.0
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VT-SX1278-433M
Antennas
We offer many kinds of antennas. We can design a matching antenna for specific conditions. Some of the
antennas are show on
Spring-loaded Antenna
 Small size
 Low cost
 Easy to embedded
Stick Antenna
 Medium size
 Low cost
 High gain
Sucker Antenna
 High gain
 Have sucker
 Easy to fix
Copyright：@2016 V-Chip Microsystems, Inc
Revision：v1.0.0
5
VT-SX1278-433M
Document History
Revision
Date
Description of change
V1.0.0
2016-07-12
New User’s guide.
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Copyright：@2016 V-Chip Microsystems, Inc
Revision：v1.0.0
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