Preliminary
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Figure 3.22. Calibrated HFRCO 14 MHz Band Frequency vs Supply Voltage and Temperature
14.15
14.10
14.05
14.00
13.95
13.90
13.85
14.15
14.10
14.05
14.00
13.95
13.90
13.85
- 40°C
25°C
85°C
1.8 V
3 V
3.8 V
1.8
2.2
2.6
3.0
3.4
3.8
–40
–15
5
25
45
65
85
Vdd [V]
Temperature [°C]
Figure 3.23. Calibrated HFRCO 21 MHz Band Frequency vs Supply Voltage and Temperature
21.2
21.1
21.0
20.9
20.8
20.7
20.6
21.2
21.1
21.0
20.9
20.8
20.7
20.6
- 40°C
25°C
85°C
1.8 V
3 V
3.8 V
1.8
2.2
2.6
3.0
3.4
3.8
–40
–15
5
25
45
65
85
Vdd [V]
Temperature [°C]
3.9.5 ULFRCO
Table 3.12. ULFRCO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
fULFRCO
Oscillation frequen- 25°C, 3V
cy
0.8
1.5 kHz
TCULFRCO
Temperature coeffi-
cient
0.05
%/°C
VCULFRCO
Supply voltage co-
efficient
-18.2
%/V
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2013-10-09 - EFM32ZG108FXX - d0063_Rev0.60
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