Sensor supplier ams has unveiled a small integrated module for direct time-of-flight (ToF) distance measurement from 2 cm to 2.5 m. The TMF8801 comes in a 2.2 x 3.6 x 1.0-mm package that is reportedly more than 30% smaller than competing ToF sensors, suiting it for space-constrained designs.
The module integrates a VCSEL infrared emitter, multiple SPAD (single photon avalanche photo-diode) light detectors, time-to-digital converter, and on-chip microcontroller for processing histograms. Compared to distance averaging employed with an indirect ToF system, the direct ToF time measurement methodology used in the TMF8801 delivers higher accuracy true-distance measurements, said the company.
When used to support LDAF, high accuracy distance measurements deliver improved camera performance, including sharper, in-focused images under any ambient lighting conditions and accurate adjustment of the camera flash brightness to improve picture quality.
The module’s small size and low power consumption suits it for fast-ranging collision avoidance detection used in autonomous vacuum cleaners and industrial robotics. For display-based products such as mobile computing, the TMF8801 can be used for user presence detection to automatically wake up or put the system into a low-power sleep mode.
The TMF8801 is priced from $2.89 in quantities of 5,000 pieces.