EFM32G Data Sheet
Electrical Characteristics
4.12 Analog Comparator (ACMP)
Table 4.16. ACMP
Test Condition
Parameter
Symbol
VACMPIN
Min
0
Typ
—
Max
VDD
VDD
Unit
V
Input voltage range
ACMP Common Mode voltage VACMPCM
range
0
—
V
BIASPROG=0b0000, FULL-
BIAS=0 and HALFBIAS=1 in
ACMPn_CTRL register
—
—
—
—
55
2.82
250
0
600
12
µA
µA
µA
µA
BIASPROG=0b1111, FULL-
BIAS=0 and HALFBIAS=0 in
ACMPn_CTRL register
IACMP
Active current
BIASPROG=0b1111, FULL-
BIAS=1 and HALFBIAS=0 in
ACMPn_CTRL register
520
0.5
Internal voltage reference off.
Using external voltage refer-
ence
Current consumption of internal
voltage reference
IACMPREF
Internal voltage reference,
LPREF=1
—
—
0.050
3
µA
µA
Internal voltage reference,
LPREF=0
6
0
—
12
Offset voltage
VACMPOFFSET
BIASPROG= 0b1010, FULL-
BIAS=0 and HALFBIAS=0 in
ACMPn_CTRL register
-12
mV
ACMP hysteresis
VACMPHYST
Programmable
—
—
17
39
—
—
mV
kΩ
CSRESSEL=0b00 in
ACMPn_INPUTSEL
CSRESSEL=0b01 in
ACMPn_INPUTSEL
—
—
—
—
71
104
136
—
—
—
—
10
kΩ
kΩ
kΩ
µs
Capacitive Sense Internal Re-
sistance
RCSRES
CSRESSEL=0b10 in
ACMPn_INPUTSEL
CSRESSEL=0b11 in
ACMPn_INPUTSEL
Startup time
tACMPSTART
The total ACMP current is the sum of the contributions from the ACMP and its internal voltage reference as given in the following equa-
tion. IACMPREF is zero if an external voltage reference is used.
I
= I
+ I
ACMP ACMPREF
ACMPTOTAL
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