EFM32G840F128 Datasheet, PDF (29/71 Pages) Silicon Laboratories – ARM Cortex-M3 CPU platform

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Figure 3.20. Calibrated LFRCO Frequency vs Temperature and Supply Voltage
42
- 40°C
25°C
40
85°C
38
36
34
32
30
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [V]
42
40
38
36
34
32
30
–4 0
1.8 V
3V
3.8 V
–1 5
5
25
45
65
85
Tem perature [°C]
3.9.4 HFRCO
Table 3.12. HFRCO
Symbol
Parameter
Condition
28 MHz frequency band
21 MHz frequency band
f_HFRCO
Oscillation frequen-
cy, V_DD= 3.0 V,
T_AMB=25°C
14 MHz frequency band
11 MHz frequency band
7 MHz frequency band
1 MHz frequency band
t_{HFRCO_settling} Settling time after
start-up
f_HFRCO = 14 MHz
I_HFRCO
DC_HFRCO
TC_HFRCO
f_HFRCO = 28 MHz
f_HFRCO = 21 MHz
Current consump-
tion
f_HFRCO = 14 MHz
f_HFRCO = 11 MHz
f_HFRCO = 6.6 MHz
f_HFRCO = 1.2 MHz
Duty cycle
f_HFRCO = 14 MHz
f_HFRCO = 28 MHz
f_HFRCO = 21 MHz
Temperature coeffi- ^{fHFRCO = 14 MHz}
cient, V_DD= 3.0 V
f_HFRCO = 11 MHz
f_HFRCO = 6.6 MHz
f_HFRCO = 1.2 MHz
Min
Typ
Max
Unit
28
MHz
21
MHz
14
MHz
11
MHz
6.6¹
MHz
1.2²
MHz
0.6
Cycles
48.5
106
93
77
72
63
22
50
±0.005³
±0.01³
±0.01³
±0.02³
±0.02³
±0.06³
µA
µA
µA
µA
µA
µA
51 %
%/°C
%/°C
%/°C
%/°C
%/°C
%/°C
2013-11-22 - EFM32G840FXX - d0008_Rev1.71
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