qt110 Quantum Research Group, qt110 Datasheet - Page 9

• Manufacturer Part Number: qt110
• Description: Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

4.5 DC SPECIFICATIONS
Vdd = 3.0, Cs = 10nF, Rs = 470K, Cx = 10pF, Gain = High, Ta = 20
LQ
Parameter
V
V
V
S[1]
S[2]
S[3]
V
V
I
V
A
DDS
I
DDL
DD
8.0
6.0
4.0
2.0
OL
OH
IL
3.0
2.5
2.0
1.5
1.0
0.5
HL
IL
R
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 - high gain
Sensitivity - medium gain
Sensitivity - low gain
Figure 4-1 High Gain Sensitivity
Figure 4-3 Low Gain Sensitivity
10
10
Valid operating range
Description
and Range @ Vdd = 3V
and Range @ Vdd = 3V
Valid operating range
Cs, nF
Cs, nF
20
20
Vdd-0.7
Min
100
2.2
Cx=30pF
Cx=30pF
25pF
20pF
10pF
5pF
0pF
25pF
20pF
10pF
5pF
0pF
30
30
Typ
9.5
1.2
1.8
3.8
26
12
8
9
O
C, unless otherwise noted.
Max
2.45
0.8
0.6
±1
4.0
3.0
2.0
1.0
40
35
30
25
20
15
10
5
Figure 4-4 Typical Supply Current Vs Vdd
2.5
Units
Rs = 470K, Cx = 10pF, Gain = High
bits
V/s
µA
µA
µA
µA
pF
pF
pF
V
V
V
V
V
Figure 4-2 Medium Gain Sensitivity
3
10
@5.0V
@3.3V
@2.5V
Required for proper startup
OPT1, OPT2
OPT1, OPT2
OUT, 4mA sink
OUT, 1mA source
OPT1, OPT2
Cx = 10pF, Cs = 15nF; Figure 4-1
Cx = 10pF, Cs = 15nF; Figure 4-2
Cx = 10pF, Cs = 15nF; Figure 4-3
and Range @ Vdd = 3V
Valid operating range
Cs, nF
Cs = 20nF
3.5
Vdd
Cs = 10nF
.. .
QT110 R1.04/0405
20
Notes
4
4.5
Cx=30pF
25pF
20pF
10pF
5pF
0pF
30
5