OPI125

Data Rate:	250kbps
Supplier Device Package:	--
Package / Case:	Axial - 5 leads
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 100°C
Voltage - Supply:	4.5 V ~ 5.5 V
Current - DC Forward (If) (Max):	25mA
Voltage - Forward (Vf) (Typ):	1.5V (Max)
Rise / Fall Time (Typ):	100ns, 100ns
Propagation Delay tpLH / tpHL (Max):	5µs, 5µs (Typ)
Series:	--
Output Type:	Push-Pull, Totem Pole
Input Type:	DC
Common Mode Transient Immunity (Min):	--
Voltage - Isolation:	15000VDC
Inputs - Side 1/Side 2:	1/0
Number of Channels:	1
Part Status:	Active
Packaging:	Bulk

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Introduction

Optoisolators are composed of a semiconductor light source and a phototransistor separated by an optically insulating medium. They are used to provide high electrical isolation between two circuits - often between a high voltage signal and a microcontroller signal. The OPI125 optoisolator is a popular logic output optoisolator used in many applications. This article will discuss the application field and working principle of the OPI125 optoisolator.

Application Fields

The OPI125 is used in a variety of applications due to its fast signal transmission and high electrical isolation. It is often used to for isolation between a low voltage signal and a high voltage signal. OPI125 can be used in motor drive and robotics applications. It can be used to isolate the power signals from the controlling automation systems where the systems require rapid response time and a wide dynamic range. In motor drive applications, the OPI125 provides isolation between the power channel and the control channel and ensures stable power supply. In industrial automation, the OPI125 can be used for switching and monitoring of electrical signals. It can be used to monitor temperature, pressure and other conditions for industrial devices with high electrical isolation. The OPI125 can also be used for signal and data transmission, providing a secure transmission of digital and analog signals.

Working Principle

The OPI125 optoisolator consists of a light source, such as an LED, and a phototransistor. The light source is connected to an input signal and the phototransistor is connected to the output signal. When an input signal is applied to the OPI125, the light source emits light which is detected by the phototransistor. The phototransistor converts the light signal into an electrical signal and sends it to the output circuit. In this way, the optoisolator isolates the input signal from the output signal and prevents any electrical interference. The OPI125 also has a variable response time. The response time can be adjusted by adjusting the brightness of the light source. The brightness of the light source can be varied by applying different input voltages. This allows for the adjustment of the response time depending on the application need.

Conclusion

The OPI125 is a popular logic output optoisolator used in a variety of applications due to its fast signal transmission and high electrical isolation. It is often used to provide isolation between a low voltage signal and a high voltage signal. The OPI125 optoisolator consists of a light source and a phototransistor and can be used in motor drive and industrial automation applications. The response time can be adjusted by adjusting the light source brightness.

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