Atmel Single Channel Touch Sensor IC 6-SOT23

The Atmel Single Channel Touch Sensor IC is a highly integrated, single-channel digital touch sensor designed for reliable capacitive touch controls in a compact 6-SOT23 package. It is an ideal power switch replacement for a vast range of electronic products.

Overview

Based on proprietary charge-transfer (QT) sensing technology, the device provides a robust toggle-mode (touch-on/touch-off) output with programmable auto switch-off capability. All necessary hardware and signal processing functions are incorporated to deliver stable and consistent sensing performance under varying environmental conditions. The device measures 3.3 (width) x 1.5 (depth) x 4.3 (height) and weighs 0.122 g.

Key Features

• Self-calibration, auto drift compensation and integrated noise filtering, which work together to prevent false triggers
• Configurable timeout that automatically powers down the connected device after a user-defined delay, from minutes up to one hour, to help conserve energy in battery-operated applications
• Configurable as either a single touch key or a proximity sensor
• Key sensitivity adjustable via a single external capacitor (Cs)
• Digital output hardware-configurable as either active high or active low

Design Flexibility

The sensor is compatible with a wide array of electrode materials, including etched copper, silver, carbon and Indium Tin Oxide (ITO), and supports substrates such as PCB, FPC, plastic films and glass. It can sense through panel materials such as plastic, glass, composites and painted surfaces, up to 12 mm (glass) or 6 mm (plastic) thick, depending on electrode size and external sensitivity settings. The patented Spread-S technology supports electrode sizes from 6 x 6 mm upwards, enabling solid or ring electrode patterns, all achievable with a single PCB layer.