Current Consumption; Modes; Table 2: Current Specifications - Sierra Wireless MC5720 Hardware Integration Manual

Current consumption

Electrical requirements and current specifications are listed in Table 2.
Conditions related to the various modes of operation are described in subsections
following the table. These specifications identify the maximum current drain;
typical use should result in less drain, depending on the application.
For sleep modes, the figures are given for the actual sleep state. The modem
wakes at intervals to control timing and check for traffic. At those moments the
current consumption is higher.

Table 2: Current specifications

Condition
CDMA Transmitting
CDMA Receiving
CDMA Sleep
GSM Transmitting
GSM Receiving
Deep Sleep average
Shutdown
Note 1— CDMA Transmitting
The transmit current is dependent on the radio band in use and the network's
control of the modem output power. The "typical" value is based on 40% full
rate and 60% 1/8th rate over -35 – +23.5 dBm.
Note 2—CDMA Sleep
The EM supports slotted mode operation and Quick Paging Channel. Both of
these features enable reduced sleep current. The figures quoted are the lowest
power consumption (/DTR1 must be deasserted) during the sleep cycle.
The default Slot Cycle Index (SCI) for slotted mode operation is determined by
the PRI setting (usually set to 1). To achieve the lowest current consumption, the
DTR signal must be deasserted. Figures given are during the sleep state as
outlined in the mode details.
Note 1— GSM Transmitting
The transmit current is dependent on the radio band in use and the network's
control of the modem output power. The "typical" value is based on 1Tx slot @
+5 dBm. The "maximum" value is the highest pulse current during a +33 dBm
Tx burst.

Modes

The EM operates in several different modes; the mode can have a significant
impact on current consumption.
Rev 1.2
A p r - 0 5
Minimum
1
250
90
2
(slot cycle 2) 1.4
3
-
-
0.5
0.03
P r o p r i e t a r y a n d c o n f i d e n t i a l
P o we r I n t e r f a c e
Typical Maximum
300 950
100 120
1.7 1.75
140 2750
75 -
0.7 1.5
0.05 0.1
Units
mA
mA
mA
mA
mA
mA
mA
2 5