QT1106 View Datasheet(PDF) - Quantum Research Group
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Description
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QT1106 Datasheet PDF : 20 Pages
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6.5 Power Supply
The power supply can range from 2.8 to 5. 0 volts. If this
fluctuates slowly with temperature, the device will track and
compensate for these changes automatically with only minor
changes in sensitivity. If the supply voltage drifts or shifts
quickly, the drift compensation mechanism will not be able to
keep up, causing sensitivity anomalies or false detections.
The QT1106 power supply should be locally regulated using
a three-terminal device, to between 2.8V and 5 .0V. If the
supply is shared with another electronic system, care should
be taken to ensure that the supply is free of digital spikes,
sags, and surges, all of which can cause adverse effects.
For proper operation a 0.1µF, or greater, bypass capacitor
must be used between Vdd and Vss ; the bypass capacitor
should be routed with very short tracks to the QT1106's Vss
and Vdd pins.
6.6 PCB Layout and Construction
Refer to the Application Note AN-KD02 ‘ Secrets of a
Successful QTouch Design’, downloadable from the
Quantum web site http://www.qprox.com (go to the Support
tab and click Application Notes) for information related to
layout and construction matters. D ownloadable example
CAD files for wheels and sliders can also be found on the
website)
The sensing channels used for the individual keys can be
implemented as per AN-KD02.
Lq
14
QT1106-ISG R8I.05/0906
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