New from Silicon Laboratories is the Si114x family, its next-generation infrared (IR) and ambient light sensors for human interface (HI) applications.

Measuring 2mm x 2mm, the proximity sensors’ combined architectural optimisations result in very high system SNR (signal-to-noise ratio), enabling them to achieve the industry’s longest range, highest sensitivity and fastest data acquisition speed, claims the company.

Their sensitivity gives developers the flexibility to locate IR sensors behind semi-opaque product overlays. The robust IR sensing architecture also operates in sunlight and includes an ambient light sensor capable of sensing levels up to 128 kilolux. In addition, the advanced architecture enables proximity measurements in only 25 microseconds, minimising the on-time of LEDs and lowering power consumption.

The Si114x family includes sensor options with up to three infrared LED drivers, giving developers the freedom to implement one-dimensional HI systems with a detection range of more than 50cm or multi-dimensional systems capable of gesture sensing with ranges of up to 15cm. The Si1142 and Si1143 devices, with two and three infrared LED drivers respectively, enable advanced motion and gesture sensing. With its two integrated LED drivers, the Si1142 supports z- and x-axis motion sensing for touchless slider interfaces. The Si1143, which supports three LED drivers, enables innovative 3D motion sensing for the ultimate in multi-dimensional touchless control.

Coupled with the intelligent control of the company’s capacitive touch-sense microcontroller (MCU), the sensors can enable a wide range of motion and gesture detection and expected-object distance correction applications.