Chengdu Ebyte Electronic Technology Co., Ltd
E21-400G37 User Manual
Copyright ©2012–2019, hengdu Ebyte Electronic Technology Co., Ltd
4
Chapter II Specifications
2.1 Limit parameter
Main parameter
Performance
Note
Min
Max
Supply voltage (V)
3.3
5.5
Permanently burned modules over 6V
PA drive voltage (V)
7.4
7.6
Default 7.5V power supply can output full power
Blocking power (dBm)
-
10dbm
High burning probability of high-power module
in close use
Operating temperature (℃)
-40
+85
Industrial grade
2.2 Working parameters
Main parameter
Performance
Note
Min
Type
Max
Supply voltage (V)
3.3
5
5.5
≥ 4.7V guaranteed output power
PA control voltage (V)
7.4
7.5
7.6
7.5V is recommended to ensure the best
performance
Operating temperature (℃)
-40
25
+85
Industrial grade design
Operating frequency band
(MHz)
410
-
493
ISM band
Power
waste
Emission current (mA)
1400
1500
1600
Instantaneous power 37dBm (power supply
voltage 5V, PA voltage 7.5V test)
Receiving current
(mA)
6.5
8
-
-100dBm input current 8mA
Sleep current（ μ A）
3.0
T/RX_EN = 0
Maximum transmit power (dBm)
36
37
38
The front stage input power is greater than
17dBm, which can ensure full power output
Receive gain (dBm)
14
15
17
-100dBm input
2.3 Parametric curve
Main parameter
Description
Note
Reference distance
20Km
Clear and open environment, antenna gain 5dBi, antenna height
2m, air speed 2.4kbps
Packaging method
SMD
/
Interface mode
1.5mm
Stamp hole
Overall dimensions
45*30mm
/
RF input/output interface
Stamp/IPX
Equivalent impedance about 50 Ω
