Located in the front of the phone, above the main speaker, the FlightSenseTM proximity sensor uses optical land-grid array (LGA) packaging. The custom Apple device measures 2.80 mm x 2.40 mm, half the size of the rest of STMicroelectronics’s portfolio.
This report analyzes the complete microsystem, from the illumination device, which is a Vertical-Cavity Surface-Emitting Laser (VCSEL), to the collector, which is based on STMicroelectronics’ Single Photon Avalanche Diode (SPAD). It includes a complete cost analysis and price estimation of the device based on a detailed description of the package, the ToF detector and the VCSEL.
It also features a complete technology comparison with every product in STMicroelectronics’ ToF portfolio since the first generation, including the VL53L0X and VL6180X, especially looking at the SPAD’s evolution.