Specifications

MC55/56 Hardware Interface Description
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MC55/56_hd_v04.00a Page 85 of 108 24.08.2006
5.6.1 Current consumption during transmit burst
The diagrams below illustrate the typical current consumption of the application caused
during a transmit burst. The typical peak current is shown vs. the power control level for 900
MHz, 1800 MHz and 1900 MHz and vs. the return loss of the antenna.
Test conditions: All measurements have been performed at T
amb
= 25°C, V
BATT+ nom
= 4.1V.
Reference points for measuring the voltage are the BATT+ and GND test points on the back
side of the module. The curves are for one TX slot (for example a voice call, CSD call or
Class 8 GPRS). Curves for Class 10 GPRS activities (2 TX slots) are shown too.
Changing the conditions, e.g. in terms of temperature or voltage, will cause different results.
Average Current GSM900 (V
BATT+
=4.1V)
0.10
0.10
0.11
0.15
0.21
0.25
0.13
0.14
0.16
0.23
0.33
0.43
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
5 7 9 11 13 15 17 19
Power Control Level
Current (Amps)
1 TX - Average Current
2 TX - Average Current
Figure 35: Typical current consumption vs. PCL in EGSM 900 network