at42qt2160 ATMEL Corporation, at42qt2160 Datasheet - Page 6

• Manufacturer Part Number: at42qt2160
• Description: Qslide?, 16-key Qmatrix? Sensor Ic
• Manufacturer: ATMEL Corporation

6
AT42QT2160
Unlike other QT circuits, the Cs capacitor values on QT2160 devices have no effect on
conversion gain. However, they do affect conversion time.
Unused Y lines should be left open.
Figure 4-1.
Figure 4-2.
Figure 4-3.
VCs – Nonlinear During Burst
(Burst too long, or Cs too small, or X-Y transcapacitance too large)
VCs – Poor Gain, Nonlinear During Burst
(Excess capacitance from Y line to Gnd)
VCs – Correct
X Drive
X Drive
X Drive
YnB
YnB
YnB
9502A–AT42–07/08