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2013-06-28 - EFM32G232FXX - d0069_Rev1.60
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Figure 3.24. Calibrated HFRCO 28 MHz Band Frequency vs Temperature and Supply Voltage
1.8
2.2
2.6
3.0
3.4
3.8
Vdd [ V]
27.4
27.5
27.6
27.7
27.8
27.9
28.0
28.1
F
re
q
u
e
n
c
y
[M
H
z
]
-40° C
25° C
85° C
–40
–15
5
25
45
65
85
Tem perat ure [ ° C]
27.4
27.5
27.6
27.7
27.8
27.9
28.0
28.1
F
re
q
u
e
n
c
y
[M
H
z
]
1.8 V
3 V
3.8 V
3.9.5 ULFRCO
Table 3.13. ULFRCO
Symbol
Parameter
Condition
Min
Typ
Max
Unit
fULFRCO
Oscillation frequency
25°C, 3V
0.8
1.5
kHz
TCULFRCO
Temperature coefficient
0.05
%/°C
VCULFRCO
Supply voltage coefficient
-18.2
%/V
3.10 Analog Digital Converter (ADC)
Table 3.14. ADC
Symbol
Parameter
Condition
Min
Typ
Max
Unit
Single ended
0
VREF V
VADCIN
Input voltage range
Differential
-VREF/2
VREF/2 V
VADCREFIN
Input range of external ref-
erence voltage, single end-
ed and differential
1.25
VDD V
VADCREFIN_CH7 Input range of external neg-
ative reference voltage on
channel 7
See VADCREFIN
0
VDD - 1.1 V
VADCREFIN_CH6 Input range of external pos-
itive reference voltage on
channel 6
See VADCREFIN
0.625
VDD V
VADCCMIN
Common mode input range
0
VDD V
IADCIN
Input current
2pF sampling capacitors
<100
nA
CMRRADC
Analog input common
mode rejection ratio
65
dB
1 MSamples/s, 12 bit, exter-
nal reference
351
A
IADC
Average active current
1 MSamples/s, 12 bit, internal
reference
411
A