Haptic Touch Key Module for Automotive Switches

This automotive touch key solution with 'haptics' at minimal cost allows for the addition of haptic feedback to any control switch.

System Benefits:

• Entry-class MCU can control touch sensing and haptic drivers, and the rest of the system including support for the high-speed communication protocol CAN FD and in-vehicle security EVITA-Light. All of this can be offered at the lowest possible cost.​
• The haptic driver can input up to six different triggers from three GPIO pins, so it is possible to assign different signal patterns to multiple touch keys. ​
• Vibration delay can be minimized (0.75ms) and it achieves a low current consumption of 0.36µA when idle.​
• The touch key demo board works together with the touch sensitivity tuning tool, which works in conjunction with the DA728x-EVAL-KIT low-power high-definition haptic driver evaluation kit and a haptic sequence design tool. Software for the interoperation of both boards is also available.