qt118h Quantum Research Group, qt118h Datasheet - Page 10

• Manufacturer Part Number: qt118h
• Description: Charge-transfer Touch Sensor
• Manufacturer: Quantum Research Group

4.5 DC SPECIFICATIONS
Vdd = 3.0, Cs = 10nF, Rs = 470K, Cx = 10pF, Gain = High, Ta = 20
lq
Parameter
V
10.00
V
V
V
V
V
I
V
A
1.00
0.10
0.01
DDS
I
DDL
DDL
DD
S
OH
OL
IL
HL
IL
R
Figure 4-1 - Typical Threshold Sensitivity vs. Cx,
High Gain, at Selected Values of Cs; Vdd = 3.0
0
Guaranteed min Vdd
Guaranteed min Vdd
Supply current
Supply turn-on slope
Low input logic level
High input logic level
Low output voltage
High output voltage
Input leakage current
Acquisition resolution
Sensitivity range
10
Description
Cx Load, pF
20
30
40
35
30
25
20
15
10
5
2.5
40
Vdd-0.7
Figure 4-3 Typical Supply Current Vs Vdd
1,000
Min
100
2.2
Rs = 470K, Cx = 10pF, Gain = High
3
10nF
20nF
50nF
100nF
200nF
500nF
Typ
30
10
8
9
Cs = 20nF
3.5
10
Vdd
Cs = 10nF
.. .
O
Max
C Unless otherwise noted.
2.45
2.95
0.8
0.6
±1
14
28
10.00
1.00
0.10
0.01
4
Figure 4-2 - Typical Threshold Sensitivity vs. Cx,
Medium Gain, Selected Values of Cs; Vdd = 3.0
0
4.5
Units
bits
V/s
µA
µA
fF
V
V
V
V
V
V
10
-E suffix
@ Vdd = 5.0V
@ Vdd = 3.3V
@ Vdd = 2.5V
Required for proper startup
OPT1, OPT2
OPT1, OPT2
OUT, 4mA sink
OUT, 1mA source
OPT1, OPT2
Note 2
-I suffix
5
Cx Load, pF
20
QT118H R1.08 / 0405
30
Notes
40
10nF
20nF
50nF
100nF
200nF
500nF