SX127X RF Module User Manual of E19 Series Modules
Copyright
©
2012
–
2017
，
Chengdu Ebyte Electronic Technology Co.,Ltd
4
LoRa SX-1276 1W
module
3.3
3.5
5.5
V DC
●
If the voltage is at maximum value for long time, the
module may be damaged;
● The power supply pin has certain surge
-resistance ability,
but the potential pulse higher than the maximum power
supply voltage;
● The power supply voltage is recommended to be higher
than 3.0V, if the voltage is lower than 3.0V, the RF
parameters will be affected at different degrees.
1.2.5 Communication level
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
1.8
3.3
3.6
V DC
●
If the communication level is higher than the allowed
maximum value, the module may be damaged;
●
Although the communication level can be switched with
various methods, the power consumption of the whole
module will be affected at great degree.
1.3
RF parameters
1.3.1 Transmitting Power
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
29.6
30.0
30.5
dBm
●
Due to the error of the materials, each LRC component
has ±0.1% error, so error accumulation will occur since
multiple LRC components are used in the whole RF circuit,
and the transmitting currents will be different at different
modules;
●
The power consumption can be lowered by lowering
the transmitting power, but the efficiency of the internal PA
will be decreased by lowering transmitting power due to
various reasons;
●
The transmitting power will be lowered by lowering the
power supply voltage.
1.3.2 Receiving sensitivity
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
-147.2
-148.0
-149.2
dBm
●
The current sensitivity is tested under the Coding rate of
4/5 and spread spectrum factor of 12
●
Due to the error of the materials, each LRC component
has ±0.1% error, so error accumulation
will occur since
multiple LRC components are used in the whole RF circuit,
and the transmitting currents will be different at different
modules;
●
The receiving sensitivity will be reduced and range will be
shortened while increasing the air data rate.
1.3.3 Recommended Frequency
Model No
Min
Typ
Max
Unit
Remark
