Datasheet

3.12 Examples of Typical Applications
Figure 3-14. Application 1:
Active low, driving PNP transistor, auto-off time 375 s x 24 = 9000 s = 2.5 hours
Auto-off time obtained from 3 V chart in Figure 3-10 on page 16
Load
VDD
TIME
VSS
2
6
5
OUT
1
10k
+3V
SNSK
SNS
4
3
1M
SENSE
ELECTRODE
100nF
47nF
2.2k
DTA143
CS
RS
Rt
Ct
Rm
Auto-off time obtained from 3 V chart in Figure 3-10
Figure 3-15. Application 2:
Active high, driving high impedance, auto-off time 315 s x 1 = 5.25 minutes
Auto-off time obtained from 5 V chart in Figure 3-9 on page 15
VDD
TIME
VSS
2
6
5
OUT
1
10k
+5V
SNSK
SNS
4
3
SENSE
ELECTRODE
100nF
47nF
100k
CS
Rt
Ct
Rs
Rop
Rm
1M
Auto-off time obtained from 5 V chart in Figure 3-9
AT42QT1012
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Datasheet
DS40001948A-page 21