qt1080 Quantum Research Group, qt1080 Datasheet - Page 11

• Manufacturer Part Number: qt1080
• Description: 8 Key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

4.6 Idd Curves (Average)
lQ
Cx = 5pF, Cs = 4.7nF, Ta = 20
Cx = 5pF, Cs = 4.7nF, Ta = 20
5.0
4.0
3.0
2.0
1.0
0.0
400
300
200
100
5.0
4.0
3.0
2.0
1.0
0.0
250
200
150
100
50
0
0
2.5
2.5
2.5
2.5
QT1080 Idd (200m s response) µA
QT1080 Idd (200m s response) µA
QT1080 Idd (norm al m ode) m A
QT1080 Idd (norm al m ode) m A
Rb1=12K
Rb2=22K
Rb1=12K
Rb2=22K
3
3
3
3
3.5
3.5
3.5
3.5
Vdd(V)
Vdd(V)
Vdd(V)
Vdd(V)
4
o
o
4
4
4
C, Spread spectrum circuit of Fig. 1.1.
C, Rosc = 18K ; no spread spectrum circuit
4.5
4.5
4.5
4.5
Rb1=15K
Rb2=27K
Rb1=15K
Rb2=27K
5
5
5
5
5.5
5.5
5.5
5.5
11
125
100
500
400
300
200
100
300
250
200
150
100
400
300
200
100
75
50
25
50
0
0
0
0
2.5
2.5
2.5
2.5
QT1080 Idd (110m s response) µA
QT1080 Idd (360m s response) µA
QT1080 Idd (110m s response) µA
QT1080 Idd (360m s response) µA
Rb1=12K
Rb2=22K
Rb1=12K
Rb2=22K
3
3
3
3
3.5
3.5
3.5
3.5
Vdd(V)
Vdd(V)
Vdd(V)
Vdd(V)
4
4
4
4
QT1080 R11.06/0806
4.5
4.5
4.5
4.5
Rb1=15K
Rb2=27K
Rb1=15K
Rb2=27K
5
5
5
5
5.5
5.5
5.5
5.5