QST102 STMicroelectronics, QST102 Datasheet - Page 19

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

QST102
6.4
6.5
6.6
Table 10.
1. Class description: A Class is an STMicroelectronics internal specification. All its limits are higher than the
Operating conditions
Table 11.
Supply current characteristics
Table 12.
1. The results are performed at T = 25°C and based on C
Capacitive sensing characteristics
Table 13.
Symbol
Symbol
Symbol
DLU
I
JEDEC specifications, that means when a device belongs to Class A it exceeds the JEDEC standard. B
Class strictly covers all the JEDEC criteria (international standard).
DD
LU
V
Symbol
T
DD
A
C
C
R
C
S
X
T
S
Average suppy current
when one key is
“touched”
Average suppy current
when no key is “touched”
Static latch-up class
Dynamic latch-up class
Operating supply voltage
Operating temperature
Electrical sensitivities
Operating conditions
Supply current characteristics
External sensing components
Parameter
Sense capacitor
Equivalent electrode capacitor
Equivalent touch capacitor
Serial resistance
Paremeter
Parameter
Parameter
V
V
V
V
V
V
Conditions
DD
DD
DD
DD
DD
DD
= 2.4 V
= 3.3 V
= 5 V
= 2.4 V
= 3.3 V
= 5 V
f
DEVICE
T
V
A
DD
=+125°C
Conditions
=5.5V, f
= 4 MHz
(1)
S
= 2.7nF.
Min.
DEVICE
Conditions
= 4MHz, T
Min.
Typ.
1.50
1.95
2.95
135
200
300
Electrical characteristics
Min.
–40
2.4
A
Typ.
=+25°C
10
5
Max.
Max.
+85
5.5
Max.
100
100
22
Class
kOhm
Unit
A
A
Unit
nF
pF
pF
°C
19/29
Unit
V
mA
µA
(1)