HCPL-2631-520E Isolators

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The HCPL-2631-520E is an optoisolator belonging in the category of logic output optoisolators. It can switch up to TTL/CMOS-level logic circuits or can serve as an indicator for digital systems. The device is small, making it suitable for surface mount applications. The optoisolator is used in the automotive, medical, test & measurement, industrial, and military/aerospace industries.

Overview

The HCPL-2631-520E is a surface mountable logic output optoisolator consisting of an infrared emitting diode (LED) and an NPN silicon photodetector. The optoisolator operates up to 5.25 VDC supply voltage and consumes very low power, making it ideal for power efficient systems. It is designed to accept a logic input voltage from any TTL/CMOS circuitry and provides a signal that is isolated from the input voltage. This makes it a cost-effective solution for maintaining signal integrity, preventing signal reflections in industrial and commercial applications. In addition, the optoisolator has a wide common mode transient immunity range of up to ± 25 kV/ms.

Working Principle

The working principle of the HCPL-2631-520E optoisolator is based on the concept of optical isolation. It is composed of an LED and a photodiode, which are the two main components of an optoisolator. The LED is connected in series with the input logic and powered by the supply voltage. When the input voltage goes high, the LED sends out a beam of infrared light, which triggers the photodiode. The photodiode then amplifies the incoming signal and provides an isolated output signal. This output signal is typically used to switch TTL/CMOS-level logic circuits.

The output of the optoisolator is also capable of providing an indicator for digital systems. The LED will emit light when the input voltage goes low, indicating the logic state of the input signal. In this way, the optoisolator can be used to control an LED indicator display for diagnostic purposes.

Application Fields

HCPL-2631-520E optoisolator finds applications in automotive, medical, test & measurement, industrial as well as military/aerospace industries. In automotive applications, it can be used in automotive lighting systems to isolate the control signals from the lighting circuits. In test & measurement applications, it can be used for amplifying digital signals and ensuring signal integrity. In industrial applications, the optoisolator can be used to switch high-power loads using low-voltage TTL/CMOS logic signals.

The optoisolator can also be used in medical devices such as monitoring systems, as the device has a wide operating temperature range from -40°C to +100°C. It can also be used in military communications systems for maintaining signal integrity and prevention of electromagnetic interference.

Conclusion

The HCPL-2631-520E optoisolator from OPTEK is an ideal choice for isolating signals in industrial, automotive, test & measurement, medical, and military/aerospace applications. The optoisolator offers a wide common mode transient immunity range of up to ± 25 kV/ms and is capable of operating up to 5.25 VDC. In addition, the optoisolator requires very low power and is small in size, making it suitable for surface mount applications. With its ability to control high power loads using low-voltage logic signals, it is a cost-effective solution for maintaining signal integrity and preventing signal reflections.

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