4.5 Signal Processing
Vdd = 5.0V, Ta = recommended, Cx = 5pF, Cs = 4.7nF, 2µs QT Pulses
Description
Value
Units Notes
Detection threshold
10
counts Threshold for increase in Cx load
Detection hysteresis
2
counts
Anti-detection threshold
6
counts Threshold for decrease of Cx load
Anti-detection recalibration delay
2
secs Time to recalibrate if Cx load has exceeded anti-detection threshold
Detect Integrator filter, normal mode
6
samples Must be consecutive or detection fails
Detect Integrator filter, Fast mode
3
samples Must be consecutive or detection fails
Max On-Duration
10, 60, inf
secs Option pin selected
Normal drift compensation rate
2,000
ms/level Towards increasing Cx load
Anti drift compensation rate
500
ms/level Towards decreasing Cx load
Lq
14
QT1103_3R0.03_0607