Vishay VCNL36825T Proximity Sensor | Tech Specs
This episode of Tech Specs is part of a video series highlighting the features, applications, and technical specs of newly-released products.
Vishay VCNL36825T Proximity Sensor
The VCNL36825t proximity sensor from the Opto group of Vishay Semiconductor can detect the presence or proximity of your ear. The earbuds have a tiny hole through which the VCNL36825t emits a pulse of infrared light and, if they are in your ear, the light reflects off your skin and back to the photodetector of the sensor. The sensor then relays this information to the controller to turn on or off.
While the VCNL36825t is super tiny at 2.0 mm x 1.25 mm x 0.5 mm in height, it integrates a vertical-cavity surface-emitting laser, proximity detector, and signal conditioning IC. The sensor supports a programmable interrupt function, so the controller doesn’t constantly poll for data. It also features a programmable emitter for current to control the sensing range, has a low-power consumption mode, and has adjustable persistence to prevent false triggers. It communicates to the controller via the I2C. The sensor can consume as little as 6.63 μA with a response time of 320 ms.
Programmable Features
- High and low interrupt thresholds
- VCSEL forward current
- Smart persistence mode
- Integration time
- Low power mode
- Sunlight cancellation
- Calibration on / off
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