qt1081 Quantum Research Group, qt1081 Datasheet - Page 14

• Manufacturer Part Number: qt1081
• Description: 8-key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

4.6 Average Idd Curves
All Idd curves are average values, under the following conditions: Cx = 5pF, Ta = 20
circuit. Refer to page 9 for more information about optimization of LP modes.
Full speed operation
Low Power operation (optimized - only burst B in use)
lQ
800.0
600.0
400.0
200.0
200.0
150.0
100.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
50.0
0.0
0.0
QT1081, average Idd (100ms optimized LP operation)
0
QT1081, average Idd (340ms optimized LP operation)
0
0
QT1081, average Idd (full speed operation)
1
1
1
burst length (ms)
burst length (ms)
burst length (ms)
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
Vdd=5V
Vdd=4V
Vdd=3.3V
Vdd=2.8V
Vdd=5V
Vdd=4V
Vdd=3.3V
Vdd=2.8V
Vdd=5V
Vdd=4V
Vdd=3.3V
Vdd=2.8V
14
400.0
300.0
200.0
100.0
0.0
QT1081, average Idd (180ms optimized LP operation)
0
1
o
burst length (ms)
C, Rosc = 18KΩ; no spread-spectrum
2
3
4
QT1081_1R0.04_0307
5
6
Vdd=5V
Vdd=4V
Vdd=3.3V
Vdd=2.8V