Texas Instruments' LDC3114-Q1 is an inductive-sensing device that enables touch-button design for human-machine interfaces (HMI) on a variety of materials by measuring small deflections of conductive targets using a coil that can be implemented on a small printed circuit-board (PCB) that is located behind the panel. This technology can be used for precise linear position sensing of metal targets for automotive, consumer, and industrial applications by allowing access to the raw data representing the inductance value. Inductive-sensing solutions are insensitive to humidity or non-conductive contaminants such as oil and dirt.

The button mode can automatically correct for deformations in the conductive targets. The device offers well-matched channels which allow for differential and ratiometric measurements enabling compensation of environmental and aging conditions including temperature and mechanical drift. The LDC3114-Q1 includes an ultra-low-power mode intended for power-on/off buttons or position sensors in battery-powered applications. The LDC3114-Q1 is easily configured through an I²C interface and is available in a 16-pin TSSOP package.