qt1081 Quantum Research Group, qt1081 Datasheet - Page 13

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

4.5 Signal Processing
Vdd = 5.0, Ta = recommended, Cx = 5pF, Cs = 1nF
lQ
Description
Detection threshold
Detection hysteresis
Anti-detection threshold
Anti-detection recalibration delay
Detect Integrator filter, normal mode
Detect Integrator filter, ‘fast’ mode
Max On-Duration
Normal drift compensation rate
Anti-drift compensation rate
10, 60, ∞
Value
2,000
500
10
2
6
2
6
2
samples
samples
ms/level
ms/level
counts
counts
counts
Units
secs
secs
13
Notes
Threshold for increase in Cx load
Threshold for decrease of Cx load
Time to recalibrate if Cx load has exceeded anti-detection
threshold
Must be consecutive or detection fails
Must be consecutive or detection fails
Option pin selected
Towards increasing Cx load
Towards decreasing Cx load
QT1081_1R0.04_0307