4.3 DC Power Interface
The DC power interface consists of the DC power inputs as summarized below. The power
requirements apply to DC power measured at the Swarm Modem user connector input and not
at the output of the power supply. It is required that users incorporate the required bypass
capacitors for the supplied power input as can be seen in
.
Name
Description
Min
Typ
Max
Unit
VCC
Module supply voltage
3.00
3.30
5.00
V
VCC Ripple
Module supply voltage ripple
-
-
75
mV
pp
VCC Limits
Module supply voltage
absolute
limits
3.00
-
5.00
V
ICC (3.3V)
Current consumption - Sleep Mode
-
-
80
μA
Current consumption - Receiver Active
23
26
40
mA
Current consumption - GPS Acquisition Mode* 40
45
55
mA
Current consumption - Transmitter on
750
850
1000
mA
ICC (4.2V)
Current consumption - Sleep Mode
-
-
100
μA
Current consumption - Receiver Active
23
26
40
mA
Current consumption - GPS Acquisition Mode* 40
45
55
mA
Current consumption - Transmitter on
640
700
800
mA
ICC (5.0V)
Current consumption - Sleep Mode
-
-
110
μA
Current consumption - Receiver Active
23
26
45
mA
Current consumption - GPS Acquisition Mode* 40
45
55
mA
Current consumption - Transmitter on
500
550
600
mA
Table 8:
Power supply characteristics for 3.3, 4.2, and 5.0V supplies to the Modem.
*Includes satellite receiver active current with GPS in acquisition mode. The Modem enters into GPS acquisition
mode for approximately 30 seconds after exiting from sleep mode, on powerup, or when the Modem needs to
re-acquire a GPS fix (approximately once every 4 hours) while the Modem is continuously powered on and not in
sleep mode.
© 2022 SWARM TECHNOLOGIES
SWARM M138 MODEM PRODUCT MANUAL · REV 1.20 · FEBRUARY 2022
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