Atmel QT113B 1-Channel QTouch Touch Sensor IC DATASHEET Features Number of Keys: One Configurable as either a single key or a proximity sensor Economy: Less expensive than many mechanical switches Only one external part required a low-cost capacitor Signal processing: Consensus filter for noise immunity Sensitivity easily adjusted 100% autocal for life no adjustments required 10 s, 60 s, infinite auto-recal timeouts (strap options) Toggle mode for on/off control (strap option) Interface: Digital output, active high Moisture tolerance: Increased moisture tolerance based on hardware design and firmware tuning Power: 2.5 V to 5 V, 600 A single supply operation Package: 8-pin SOIC Applications: Light switches, appliance control, access systems, elevator buttons, proximity sensor applications, security systems, pointing devices, consumer devices, mechanical switch or button Patents: QTouch (patented charge-transfer method) HeartBeat (monitors health of device) 9525DAT4205/2013 9525DAT4205/20131. Pinout and Schematic 1.1 Pinout Configuration VDD VSS 1 8 OUT SNS2 2 7 QT113B OPT1 SNS1 3 6 OPT2 GAIN 4 5 1.2 Pinout Descriptions Table 1-1. Pin Listing Pin Name Type Comments If Unused, Connect To... 1 VDD P Supply 2 OUT 0 Output 3 OPT1 0 Option selection 1 See Table 3-1 on page 10 4 OPT2 0 Option selection 2 See Table 3-1 on page 10 5 GAIN P Gain control See Table 2-1 on page 7 6 SNS1 I Sense 1 7 SNS2 I Sense 2 8 VSS I Ground I Input only O Output only, push-pull I/O Input/output OD Open drain output P Ground or power QT113B DATASHEET 2 9525DAT4205/2013