EFM32WG332 Datasheet, PDF (47/76 Pages) Silicon Laboratories – Operation from backup battery when main power drains out

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3.13 Analog Comparator (ACMP)
Table 3.18. ACMP
Symbol
Parameter
Condition
Min
Typ
Max
Unit
V_ACMPIN
V_ACMPCM
Input voltage range
ACMP Common
Mode voltage range
0
V_DD V
0
V_DD V
BIASPROG=0b0000, FULL-
BIAS=0 and HALFBIAS=1 in
ACMPn_CTRL register
0.1
0.4 µA
I_ACMP
Active current
BIASPROG=0b1111, FULL-
BIAS=0 and HALFBIAS=0 in
ACMPn_CTRL register
2.87
15 µA
BIASPROG=0b1111, FULL-
BIAS=1 and HALFBIAS=0 in
ACMPn_CTRL register
195
520 µA
I_ACMPREF
Current consump-
tion of internal volt-
age reference
Internal voltage reference off.
Using external voltage refer-
ence
Internal voltage reference
0
µA
5
µA
V_ACMPOFFSET Offset voltage
BIASPROG= 0b1010, FULL-
-12
0
12 mV
BIAS=0 and HALFBIAS=0 in
ACMPn_CTRL register
V_ACMPHYST
ACMP hysteresis
Programmable
CSRESSEL=0b00 in
ACMPn_INPUTSEL
17
mV
39
kOhm
R_CSRES
Capacitive Sense
Internal Resistance
CSRESSEL=0b01 in
ACMPn_INPUTSEL
CSRESSEL=0b10 in
ACMPn_INPUTSEL
71
kOhm
104
kOhm
CSRESSEL=0b11 in
ACMPn_INPUTSEL
136
kOhm
t_ACMPSTART
Startup time
10 µs
The total ACMP current is the sum of the contributions from the ACMP and its internal voltage reference
as given in Equation 3.1 (p. 47) . I_ACMPREF is zero if an external voltage reference is used.
Total ACMP Active Current
I_ACMPTOTAL = I_ACMP + I_ACMPREF
(3.1)
2014-06-13 - EFM32WG332FXX - d0191_Rev1.40
47
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