OPI128

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Introduction

The OPI128 optoisolator logic output is an optoisolator designed specifically for logic signal control. It combines two unique technologies - an internal light source and a high speed current feedback circuit - to assure high speed and high reliability logic signal gate control. This paper will explore the OPI128 optoisolator logic output application field and working principle.

Application Field

The OPI128 optoisolator logic output offers a solution for gate control applications. It is suitable for use in environments where logic signal noise, electrostatic discharge (ESD), or sustained overloads can disrupt delicate circuitry. OPI128 can be applied to the switch/gate control of optoelectronic devices such as LEDs, infrared LEDs, or photodiodes with a wide variety of supply and control voltages. It is capable of working with a wide variety of logic signals including digital, analog, and pulse signals.

Features of OPI128

• High speed gate control with guaranteed rise/fall times of 5ns
• High speed output current range of 1mA to 25mA with voltage values of 6V to 24V
• High accuracy, low power consumption
• Full (16-bit) CMOS and TTL logic support
• Superior isolation reliability
• Radiated emission and radiation immunity

Applications

The OPI128 optoisolator logic output has a wide variety of applications in many industries. It is commonly used in the automotive industry for switch and gate control applications, as well as in the medical and industrial fields, where reliable gate control devices are essential. The OPI128 can be used for motor control, voltage and current monitoring, interface protection, amplifier control, and other gate control applications.

Working Principle

At the heart of the OPI128 optoisolator logic output is a high speed current feedback circuit. This circuit uses the light emitted from the high power infrared LED emitter to trigger a circuit that produces the logic gate control signals. The OPI128 contains two feedback paths, one for ON and one for OFF. The output signal is a current, which is then converted to the required voltage level by the associated driver circuit.

Clean Signal Output and Protection

The OPI128 optoisolator logic output provides clean, crisp output signals with guaranteed rise and fall times of 5ns. The output of the OPI128 is also protected against ESD, and is capable of withstanding sustained overloads.

EMI and RFI Immunity

The OPI128 optoisolator logic output is designed to provide superior performance in the most demanding applications. It is immune to interference from EMI and RFI, ensuring that the signal transfer is reliable and interference-free. The OPI128 also offers excellent radiated emission and immunity and does not require costly shielding or filtering.

Conclusion

The OPI128 optoisolator logic output is an ideal choice for gate and switch control applications in the automotive, medical, and industrial fields. It combines two unique technologies - a high speed current feedback circuit and high power infrared LED emitter - to ensure reliable, high speed gate control. It is capable of operating with a variety of logic signals, and offers superior protection against EMI, RFI, and ESD as well.

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