EFM32G840F128 Datasheet, PDF (30/71 Pages) Silicon Laboratories – ARM Cortex-M3 CPU platform

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Symbol
Parameter
Condition
Min
f_HFRCO = 28 MHz
f_HFRCO = 21 MHz
VC_HFRCO
Supply volt-
age coefficient,
T_AMB=25°C
f_HFRCO = 14 MHz
f_HFRCO = 11 MHz
f_HFRCO = 6.6 MHz
f_HFRCO = 1.2 MHz
TUNESTEP_H- Frequency step
FRCO
for LSB change in
TUNING value
1_{7 MHz for devices with prod. rev. < 19.}
2_{1 MHz for devices with prod. rev. < 19.}
3_{Calculated using (max(-40°C - 85°C) - min(-40°C - 85°C)) / f_HFRCO / (85°C - (-40°C))}
4_{Calculated using (max(1.8V - 3.8V) - min(1.8V - 3.8V)) / f_HFRCO / (3.8V - 1.8V))}
Typ
Max
±0.52⁴
±0.25⁴
±0.32⁴
±0.28⁴
±0.3⁴
±15⁴
0.3
Unit
%/V
%/V
%/V
%/V
%/V
%/V
%
Figure 3.21. Calibrated HFRCO 11 MHz Band Frequency vs Supply Voltage and Temperature
11.15
11.10
11.05
11.00
10.95
- 40°C
25°C
85°C
10.90
10.85
10.80
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [V]
11.20
11.15
11.10
1.8 V
3V
3.8 V
11.05
11.00
10.95
10.90
10.85
10.80
–4 0
–1 5
5
25
45
65
85
Tem perature [°C]
Figure 3.22. Calibrated HFRCO 14 MHz Band Frequency vs Supply Voltage and Temperature
14.15
14.10
- 40°C
25°C
85°C
14.05
14.00
13.95
13.90
13.85
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [V]
14.15
14.10
1.8 V
3V
3.8 V
14.05
14.00
13.95
13.90
13.85
–4 0
–1 5
5
25
45
65
85
Tem perature [°C]
2013-11-22 - EFM32G840FXX - d0008_Rev1.71
30
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