LTV-815S-TA

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Optoisolators - Transistor, Photovoltaic Output

The LTV-815S-TA is an optoisolator that provides complete electrical isolation between input and output in a single device. It achieves this electrical isolation between two circuits using LED light for data transmission. By providing isolation, when an electrical fault occurs in one circuit, it will not be transferred to the other circuit, enhancing system reliability. Don\'t be confused by the terminology, as it\'s just a specialized type of transistor.

Application Field

The LTV-815S-TA is typically used in a wide variety of analog and digital signal isolation applications such as protecting circuits from ground loops. It acts as a 1:1 transformer and can be used to help match load impedance. Since it can transfer signals bidirectionally, it can also be used to transfer an analog signal from one circuit to another, or provide signal amplification. Other applications include switching control, mechanical isolation, surge protection, EMI/RFI noise elimination, serial data transmission, and more.

Working Principle

The LTV-815S-TA consists of an LED and a phototransistor. The LED emits light when a current is applied to it and the phototransistor detects the presence of this light. If the LED emits light, the phototransistor\'s base current will increase, causing the collector-emitter current to flow through it. When the LED does not emit light, the phototransistor\'s base current decreases, resulting in the collector-emitter current not flowing.

The LTV-815S-TA is designed for both normal and reverse operation. In normal operation, the LED is forward-biased and the phototransistor conductance increases. In reverse operation, the LED is reverse-biased and the phototransistor conductance decreases.

The LTV-815S-TA has several features that make it a superior choice for a variety of applications. It has a high dielectric strength of 1000Vrms and a low collector-emitter saturation voltage of 0.2V. Additionally, it has a high common mode transient immunity of at least 40 dB. It also has low power consumption and low noise levels.

The LTV-815S-TA is a reliable, versatile, and cost-effective optoisolator that has been used in a wide variety of applications. It provides complete electrical isolation between input and output, making it an ideal choice for applications such as signal amplification, switching control, mechanical isolation, surge protection, EMI/RFI noise elimination, and serial data transmission.

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