EFM32WG990 Datasheet, PDF (34/80 Pages) List of Unclassifed Manufacturers – The EFM32 MCUs are the world’s most energy friendly microcontrollers.

Preliminary
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Figure 3.27. Calibrated HFRCO 28 MHz Band Frequency vs Temperature and Supply Voltage
28.1
28.0
27.9
27.8
27.7
27.6
27.5
-4 0 ° C
25°C
85°C
27.4
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [V]
28.1
28.0
1.8 V
3V
3.8 V
27.9
27.8
27.7
27.6
27.5
27.4
–4 0
–1 5
5
25
45
65
85
Tem perat ure [ ° C]
3.9.5 ULFRCO
Table 3.14. ULFRCO
Symbol
f_ULFRCO
TC_ULFRCO
VC_ULFRCO
Parameter
Oscillation frequency
Temperature coefficient
Supply voltage coefficient
Condition
25°C, 3V
Min
Typ
Max
Unit
0.8
1.5 kHz
0.05
%/°C
-18.2
%/V
3.10 Analog Digital Converter (ADC)
Table 3.15. ADC
Symbol
Parameter
Condition
Min
Typ
Max
Unit
V_ADCIN
V_ADCREFIN
Input voltage range
Single ended
Differential
Input range of external ref-
erence voltage, single end-
ed and differential
0
-V_REF/2
1.25
V_REF V
V_REF/2 V
V_DD V
V_{ADCREFIN_CH7} Input range of external neg- See V_ADCREFIN
ative reference voltage on
channel 7
0
V_DD - 1.1 V
V_{ADCREFIN_CH6} Input range of external pos- See V_ADCREFIN
itive reference voltage on
channel 6
0.625
V_DD V
V_ADCCMIN
I_ADCIN
CMRR_ADC
Common mode input range
Input current
2pF sampling capacitors
Analog input common
mode rejection ratio
0
<100
65
V_DD V
nA
dB
1 MSamples/s, 12 bit, exter-
nal reference
I_ADC
Average active current
10 kSamples/s 12 bit, internal
1.25 V reference, WARMUP-
351
µA
67
µA
2013-05-06 - EFM32WG990FXX - d0203_Rev1.10
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