Current Consumption; Current Consumption Overview - Sierra Wireless MC5725 Hardware Integration Manual

Note: Values in this guide are
taken from the appropriate
product specification documents
(PSDs) (listed in
documents
,
case of a discrepancy between
this document and the relevant
PSD, use the value listed in the
PSD.
Rev 1.9.1 Feb.09
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Current
(A)
Related
page 13) — in the
Proprietary and Confidential
the diagram. Beyond the 3.5:1 VSWR as recommended to be
worst‐case in Table A‐5, the current draw could increase
beyond 2.75 A to 3.5 A.
At maximum GSM transmit power, the input current can
remain at 2.4 A for up to 25% of each 4.6 ms GSM cycle
(1.15 ms) after initially reaching a peak of 2.75 A average over
100 μs and with an instantaneous peak current of 3.5 A.
Figure 2-7: GSM transmit power wave form
2.75A peak
2.75
2.4
0.15
25 µs
1.15 ms

Current consumption

Current consumption depends on the module's operating
mode at any given time.
This section describes:
Current consumption for both module types (MC57xx and
•
MC87xx)
• Operating modes

Current consumption overview

Electrical requirements and current specifications are listed in
Table 2‐3 (MC57xx), Table 2‐4 (MC8775/MC8775V), Table 2‐5
(MC8780/MC8781), Table 2‐6 (MC8785V), and Table 2‐7
(MC8790 / M C8790V / M C8791V / M C8792V). These specifica‐
tions identify minimum, typical, and maximum current drain
for each operating mode (while in the Normal state):
• Transmit
Receive
•
Sleep
•
• Deep sleep
• Shutdown
The current consumption values in these tables were measured
using a supply voltage of 3.3 V. The device's supply voltage is
3.0–3.6 V with a typical voltage of 3.3 V.
Power Interface
3.5:1 VSWR = 2.75A
1:1 VSWR = 2.40A
4.6 ms
27