H22A5

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Optical sensors detect changes in the intensity of light within an application or change of a light source generated by a photo-emitting diode or a photo-receiving transistor. They are also used to measure light intensity in levels, shutter speeds for motion control, or for presence detection. Photointerrupters are a type of optical sensor consisting of a photo-emitting diode and a photo-receiving transistor. The Slot type photointerrupters are usually used in high-speed switching applications. The H22A5 is a Slot type photointerrupter which consists of an infrared emitting diode and an NPN silicon phototransistor.

The housing is divided into two sections; a light emitter and a light receiver. The IR emitting diode is classified as an open collector and requires an external DC voltage for operation. The output of the LED will wane over time as the LED has a finite life. The receiving NPN transistor in the housing has a high input impedance and its collector is connected to a separate output voltage. This helps eliminate potential errors due to temperature change and circuit noise.

The H22A5 can be used as a light transmission switch in high-speed switching applications. When the light beam is obstructed, due to a change in light intensity, the transistor’s output will switch from low to high. It is also suitable for applications where high isolation and signal integrity are important. The internal circuit of the device is protected against external mechanical shock and vibrations and is certified to EMC standards.

The H22A5 can detect a change in light intensity in a wide range of applications. These applications include paper handling, indexing, timing, and position sensing. The H22A5 is compact and reliable, making it ideal for applications such as vending machines and industrial automation equipment. It is also suitable for applications where high speed response is required, such as medical equipment and optical communications systems.

The H22A5 is well-suited for high-speed, low-power switching applications. Its working principle is that when ambient light is blocked by an object, the sensor will output a digital signal indicating the blockage. The digital output can be used as an input to other circuits or as an interrupt signal. The output signal of the H22A5 can be used to control the motion of motorized objects or trigger a counter/timer circuit. The H22A5 can be used to detect the presence of people in dark environments or trigger alarm circuits in dangerous situations.

The H22A5 Slot Type Photointerrupter is one of the most reliable and commonly used photointerrupters. It is used in a wide range of applications due to its small size, high speed response and excellent signal integrity. The H22A5 is designed with an IR emitting diode and an NPN silicon phototransistor and is capable of detecting a change in light intensity in high-speed switching applications.

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