Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 76 of 92 21.12.2001
Typical Current Consumption Burst
0,00
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
2,00
01234567 891011121314151617181920
Pow er control level
peak current / A
GSM900
GSM1800
Typical Current Consumption Average
0,05
0,08
0,10
0,13
0,15
0,18
0,20
0,23
0,25
0,28
0,30
01234567891011121314151617181920
Pow er control level
Current / A
GSM 900
DCS 1800
6.4.2 Current consumption during transmit burst
The diagrams in Figure 39 through Figure 40 illustrate the peak current consumption of the
application caused during a transmit burst. The peak current is shown vs. the power level for
GSM900/1800 and vs. the return loss of the antenna. All measurements have been
performed at 25°C and 4.2V (reference points used on module: test points on ZIF
connector). Changing the conditions, e.g. in terms of temperature or voltage, will cause
different results. The current will be maximized when the maximum supply voltage is used
together with a total reflection at the RF interface. Using a supply voltage higher than 4.3V at
PCL5 GSM 900 lets the peak current rise by about 150mA, due to higher RF output power.
Figure 39: Typical current (peak) vs power control level
Figure 40: Typical current (average) vs power control level