For contactless SW, object detection

Outline

ON1109 is a photocoupler in which a high efficiency GaAs infrared light emitting diode is used as the light emitting element, and a high sensitivity phototransistor is used as the light detecting element. The two elements are arranged so as to face each other, and objects passing between them are detected.

Features

Highly precise position detection : 0.7 mm

Fast response : tr, tf = 6 µs (typ.)

Small output current variation against change in temperature

Deep and wide gap between emitting and detecting elements