Catalog
maXTouch Touchscreen Controller
Key Features
- IEC/UL 60730 Class B Certified
- IEC 61000-4-6, 7Vrms, Class A (normal touch operation) conducted noise immunity
- Scaled Deltas (remove false touches while cleaning with bleach or Windex)
- Supports multi finger thick glove (5mm) touch
- Supports thick lenses up to 10mm glass
- Adaptive Sensing (Self and Mutual cap)
- Communication via I2C interface
- Supports up to 10 concurrent touches in real time with touch area reporting
- Superior moisture performance
- High voltage option via internal voltage pump to increase signal to noise ratio (SNR)
- Operating temperature range of -40 to +85 deg C
- Package: 56-pin XQFN
Description
AI
The ATMXT112UD touchscreen controller family has 2 derivatives (namely [MXT336UD](https://www.microchip.com/en-us/product/atmxt336ud) and [MXT228UD](https://www.microchip.com/en-us/product/atmxt228ud)) and is aimed at touchscreen sizes up to 4.5-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.
