V-Chip Microsystems VT-SX1278-433M User Manual

VT-SX1278-433M Wireless Module

User 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：[phone]
Fax：[phone]
E-mail：[e-mail]
ZIP：518055
Web：www.digiRF.com

COPYRIGHT @ 2016 Shenzhen V-CHIP MICROSYSTEMS Co. Ltd v1.0.0

VT-SX1278-433M

General Description

VT-SX1278-433M is based on RF Transceiver SX1278 of SEMTECH，it’s a small size and ultra low power
UHF wireless module. SX1278 is a low cost true single chip UHF transmitter designed for very low power
wireless applications. The circuit is mainly intended for the ISM (Industrial, Scientific and Medical) and SRD
(Short Range Device) frequency bands at 315 and 433 MHz, The MAX RF output power can be set as high as
+20dBm, with data rate as high as 300Kbps. The module integrated many RF functions thus you can use it
conveniently and reducing your development time.

Features

 Central frequency is 433MHz, Frequency bands :410~525MHz
 Programmable output power up to +20dBm for all supported frequencies，the communication distance is above

3000m in sight .

 High receiver sensitivity down to -148dBm(at LORA mode)
 Programmable baseband modulator with FSK/OOK/LORA
 Programmable data rate up to 300Kbps
 256-byte TX data FIFO
 Digital RSSI output.
 Low current consumption with receive mode <14mA, transmit mode at +10dBm output power <140mA
 Low current consumption at power down state <1uA
 Integrated analog temperature sensor
 Efficient SPI interface, All registers can be programmed with one “burst” transfer
 Small dimension：20.5×15.5×2.0mm
 Operating supply voltage：1.8～3.7V DC

Applications

 Logistics Tracking System, Warehouse patrol, Electronic label.
 Replace RS232 and RS485 in data transmission
 Industrial monitoring and control in data acquisition
 AMR – Automatic Meter Reading
 Home and building automation
 Consumer Electronics products of wireless control
 Wireless alarm and security systems
 Wireless sensor networks

COPYRIGHT @ 2016 Shenzhen V-CHIP MICROSYSTEMS Co. Ltd v1.0.0

VT-SX1278-433M

General Characteristics

Test operating conditions：Ta=25°C，VCC=3.3V if nothing else stated.

Parameter

Type

Condition/Note

Operating supply voltage

DC 1.8～3.7V

Central frequency

433MHz

Can be programmable to other frequency in bands
410~525MHz

Frequency accuracy

±10KHz

Modulation format

FSK/OOK/LORA

Programmable

Transmit power

-2～+20dBm

Programmable

TX current consumption

<140mA

Po=20dBm

Receiver sensitivity

-110dBm

@LoRa，SF=12，BW=7.8kHz

RX current consumption

<14mA

Sleep State current consumption

<1uA

Refer to IC operation states

Data rate

0.018kbps~300kbps

Programmable

Spurious emissions and harmonics

< -30dBm

TX power +20dBm.

Communication distance

>3000m

0.8kBaud data rata, +20dBm output power.

Antenna impedance

50ohm

Operating temperature

-20～+85 °C

Storage temperature range

-50～+125°C

Dimension

20.5×15.5×2.0mm

See more in PCB description

Note：

1． The module transmission data rate will affect Transmission distance ,the higher the data rate , the closer the

distance, and the lower the receiving sensitivity.

2． The supply voltage to the module will affect TX power, in the operating supply voltage range, the lower the

voltage, the lower the TX power.

3． The module central frequency will change as the operating temperature change, use it under suggest temperature,

the module can work well.

4． The antenna will strongly affect the communication distance, please select matched antenna and connect it

correctly.

5． The module mount will affect the communication distance.