QTAN0079 Datasheet | Atmel

QTAN0079 Buttons, Sliders and Wheels .................................................................................................................... Sensor Design Guide  10752A- AT42- 08/11 Table of Contents Getting Started .............................................................................................................. v Section 1 Introduction To Sensor Design...................................................................................... 1 1.1 1.2 1.3 1.4 Introduction ............................................................................................................................1 Touch Sensors.......................................................................................................................1 Self-capacitance and Mutual-capacitance Sensors ...............................................................2 Some Important Theory .........................................................................................................3 Section 2 General Advice.............................................................................................................. 5 2.1 QTouch Acquisition Methods ................................................................................................5 2.1.1 2.1.2 2.1.3 2.2 2.2.1 2.2.2 2.2.3 2.2.4 2.3 2.3.1 2.3.2 2.3.3 2.3.4 2.4 2.5 Introduction ..............................................................................................................5 Charge Transfer.......................................................................................................5 QTouch-ADC ...........................................................................................................7 Cs Capacitor ............................................................................................................8 Series Resistors.......................................................................................................8 Voltage Regulator .......................