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