OP775A

Series:	*
Packaging:	Bulk
Part Status:	Obsolete
Voltage - Collector Emitter Breakdown (Max):	30V
Current - Collector (Ic) (Max):	5.5mA
Current - Dark (Id) (Max):	100nA
Wavelength:	935nm
Viewing Angle:	--
Power - Max:	100mW
Mounting Type:	Through Hole
Orientation:	Side View
Operating Temperature:	-40°C ~ 100°C (TA)
Package / Case:	Radial

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Introduction of OP775A

OP775A is a new type of photo transistor developed by Omron, a Japanese company, which is mainly used in industrial, medical and robotic applications. It is a high-sensitivity phototransistor with an ultra-high current gain value of 400. It has excellent light source-sensing capabilities, superior noise characteristics, and excellent solderability. Moreover, it is designed for small packages to save board space. OP775A is an ideal choice for applications such as motion control, presence detection and self-illumination.

Application field of OP775A

OP775A is mainly used in industrial applications such as motion control, presence detection and product inspection. It can deliver highly accurate and reliable photo-electric detection even in dusty or harsh environments. One of the common applications for OP775A is motion control, which enables accurate control of motors and other digital devices. In this application, it can detect changes in position, speed, or direction of a moving object with great accuracy. Thus, it becomes an effective tool for applications like automotive, aviation and data loggers. OP775A is also used in presence detection applications, in order to detect presence in a given area or region without contact. This photo-sensitive device can quickly identify the presence of people or objects in an area, allowing for changing input of signals that can trigger readily controllable responses. In product inspection, OP775A is used to detect the presence of defective goods. By responding to the intensity of light, it can be used to quickly scan through multiple items and identify any defect or irregularity in them. Other applications for OP775A include medical equipment control and self-illumination.

Working Principle of OP775A

OP775A is a phototransistor, which means that it responds to light energy. It works by having the light passed through a light source and then being converted to electric energy. This electric energy is then used to drive the transistor to supply an output signal. While it is a phototransistor, it has a higher current gain than other types, and behaves like a transistor amplifier when attached to the light source. In OP775A, the light energy is collected by the light-sensitive base. This light-sensitive base is formed by an emitter-base junction. This emitter-base junction is made of a gallium arsenide (GaAs) layer, and a high-resistance back-surface layer. The light energy passes through the GaAs layer, which functions as a digital switch. The electrical current created by the light energy is then chosen by the transistor to build up electric voltage. The output voltage is then regulated through a feedback loop, creating a signal that is digital in nature.

Conclusion

OP775A is a highly sophisticated photo transistor with excellent properties for industrial and medical applications. It can be used in motion control, presence detection, product inspection and self-illumination applications. Its working principle utilizes a GaAs layer which acts as a digital switch to collect the light energy and form electric current. This electric current is then regulated through a feedback loop to form a digital signal. OP775A is an ideal device for converting light energy to electrical energy due to its high-sensitivity and excellent noise characteristics.

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