by Mat Dirjish
Vishay Intertechnology’s VCNL36829UM short distance proximity sensor in a transparent mold package measuring 1.6 mm x 1.0 mm x 0.35 mm provides a 14-bit resolution and specifies an idle current down to 5 μA. Employing a vertical-cavity surface-emitting laser (VCSEL), the sensor integrates a photodiode, ASIC, 16-bit a/d converter, and a smart dual I²C slave address.
The sensor detects if users are wearing or not wearing smart wearable devices including true wireless stereo earphones, virtual reality and augmented reality headsets, and smart glasses. It is also suitable for touchless dispensing and lid-off detection in consumer appliances. Notably, the sensors’ smart dual I²C slave address allows for the connection of two proximity sensors without the need for a multiplexer.
Other features include a range of 50 mm, supply voltage of 1.8V, a programmable interrupt to specify high and low thresholds, and an isolation wall design enabling crosstalk immunity. The device also uses intelligent cancellation to further reduce crosstalk.
Samples and production quantities are available now, with lead times of 15 weeks. For deeper details, peruse the VCNL36829UM datasheet.
Mat Dirjish Online 