HOA1870-031

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Optical sensors are a type of electronic device that can sense light to output an electrical signal. Photointerrupters are one type of optical sensor that is used to detect the presence or absence of an object by using a light beam that is interrupted by the object. Of the photointerrupters available, slot type ones with a transistor output are common. The HOA1870-031 is a slot type photointerrupter with a transistor output.

The HOA1870-031 is a two-channel, infrared gallium arsenide (GaAs) photodiode with an integrated, flat frequency response silicon NPN bipolar transistor. It is available as a standard 5-pin, slot type package. The standard 5-pin package contains a common emitter, NPN bipolar transistor (with its emitter connected to the common output terminal) and the two GaAs photodiodes.

The HOA1870-031 has a high reliability and is suitable for high speed optical signal applications. The photointerrupter consists of a narrow slot which is optically coupled between the two integral photodiodes. When light is directed through the slot, the photodiode acts as a sensor and its output current is changed by the presence of an object in the slot. The change in output current is controlled by a bipolar transistor amplifier which is connected to the common output terminal.

The HOA1870-031 can be used in a variety of applications including optical proximity, object detection, optical switch, and automatic door systems. Its high speed response time (less than 100ns) and low off-state current (less than 1uA) make it suitable for a range of high speed applications. It also has a high frequency response (up to 250kHz for switching applications) and a low voltage compatible output (down to 2.7V). The HOA1870-031 is also RoHS approved, making it suitable for a range of industrial and commercial applications.

In summary, the HOA1870-031 is a slot type photointerrupter with a transistor output that provides a high speed, reliable solution for a variety of applications. Its 5-pin package houses two integral GaAs photodiodes and a NPN bipolar transistor, which allows it to detect the presence of an object using a light beam. It has a fast response time and a low off-state current, making it suitable for high speed applications. Additionally, it is RoHS approved and has a low voltage compatible output.

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