QT1106-ISG 데이터 시트보기 (PDF) - Quantum Research Group
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QT1106-ISG Datasheet PDF : 20 Pages
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7.5 Signal Processing
Vdd = 5.0V, Ta = recommended, Cx = 5pF, Cs keys = 4.7nF, Cs wheel/slider = 15nF, no spread-spectrum network, Rb1 = 20k✡;
circuit of Figure 2.1
Description
Value Units Notes
Detection threshold (keys)
10
counts Threshold for increase in Cx load
Detection threshold (wheel/slider)
40
counts Changeable through SPI
Detection hysteresis (keys)
2
counts
Detection hysteresis (wheel/slider)
5
counts 12.5% of wheel/slider detection threshold.
DI filter, start of touch, normal
mode
6
samples Must be consecutive or detection fails
DI filter, start of touch, fast DI
mode
2
samples Must be consecutive or detection fails
DI filter, end of touch
Anti-detection threshold
Anti-detection filter
Faulty channel filter
Maximum On-duration
2
8
6
1
10, 20,
60,
infinite
samples
counts
samples
samples
Threshold for decrease of Cx load
secs In these modes: Free Run, 200ms LP, 280ms LP, Sync with 55Hz sync
Lq
16
QT1106-ISG R8I.05/0906
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