QST102 STMicroelectronics, QST102 Datasheet - Page 20

• Manufacturer Part Number: QST102
• Description: Capacitive Touch Sensor Device 2 Keys With Individual Key State Outputs
• Manufacturer: STMicroelectronics

Electrical characteristics
6.7
6.7.1
20/29
Table 14.
KOUT pin characteristics
General characteristics
Subject to general operating conditions for V
Table 15.
MaxOnDuration Max on-duration delay
t
t
f(KOUT)out
r(KOUT)out
Symbol
PosRecalTh
C
NegDiffDrift
PosDiffDrift
BurstCount
PosRecalI
EofDeTh
NegDriftI
KOUT
PosDriftI
Symbol
DiffFact
I
L
DeTh
t
t
Setup
EDI
CAL
DI
Input leakage current
KOUT pin capacitance
Output high to low level fall time
Output low to high level rise time
Capacitive sensing parameters
General characteristics
Calibration duration
Setup duration
Detection integrator
Detection threshold
End of detection integrator
End of detection threshold
Positive recalibration integrator
Positive recalibration threshold
Positive differential drift compensation rate
Negative differential drift compensation rate
Positive drift integrator
Negative drift integrator
Differential time step factor
Burst length
Parameter
Parameter
DD
V
C
Between 10%
and 90%
SS
L
Conditions
and T
= 50 pF
≤
V
IN
A
≤
unless otherwise specified.
V
DD
Min.
20
Min.
Default Max.
100
-10
0.5
30
10
-8
2
2
2
6
1
5
2
Typ.
25
25
5
2000
Max.
±1
QST102
Counts
Counts
Counts
Counts
Counts
Counts
Counts
s/level
s/level
Unit
ms
ms
s
Unit
μA
pF
ns