The ATMXT448UD-HA1 touchscreen controller is aimed at display sizes up to 8.3-inches used in the home appliance market where Functional Safety is required. This device is IEC/UL 60730 Class B certified and offers unique safety-related features that enable system shut off through an intuitive soft button on a touchscreen, removing the requirement for an external safety certified stop or cancel button and associated microcontroller (MCU). This IC allows an appliance to detect touchscreen related failures and shut down the appliance automatically through a variety of self-test capabilities.

Proprietary differential touch sensing delivers unparalleled noise immunity ensuring superior touch performance even in harsh environments. It enables detection and tracking of multi-finger thick gloved touch through a wide variety of overlay materials and thicknesses, even in the presence of moisture, water and even salt water. This SNR combined with a high acquisition speed provides a fast, accurate and reliable a touch position. The controller also incorporates a new self and sensor diagnostic function, which constantly monitors the integrity of the touch system.