3 Application Interface
Copyright © Fibocom Wireless Inc.
24
Recommended
capacitance
Application
Description
8.2pF, 6.8pF,
3.9pF
2600MHz,
3500/3600/3700MHz, 5GHz
RF interference
The stable power supply can ensure the normal operation of FM101 module; and the ripple
of the power supply should be less than 300
m
V
pp
in design. When the module operates
with the maximum emission power, the maximum operating current can reach 2.5A, so the
power source should be not lower than 3.135V, or the module may shut down or reboot.
The power supply limits are shown in Figure 5:
Burst transmit
Burst transmit
min:3.135V
Power supply
Ripple
300mVpp
Drop
VBAT >3.135V
Figure 5. Power supply requirement
3.2.2
Logic Level
The FM101 module 1.8V logic level definition is shown in the following table:
Table 9. Module 1.8V logic level definition
Parameter
Minimum
Typical
Maximum
Unit
V
OH
1)
1.71
1.8
1.89
V
V
IH
2)
1.3
1.8
1.89
V
V
IL
3)
@1mA
-0.3
0
0.3
V
