ACPL-217-56AE Isolators

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Optoisolators, or optocouplers as they are sometimes known, are a technology used in all kinds of electronic equipment to provide electrical isolation between input and output components or circuits. One very common family of optoisolators is the transistor-photovoltaic output type, designated ACPL-217-56AE for standardized parts. In this article, we will discuss the application field and working principle of this optoisolator type.

The most useful application of the ACPL-217-56AE optoisolator is in fields that require galvanic isolation. This is the type of isolation used to prevent electrical shocks when using medical equipment, prevent electrical surges when using digital audio equipment, and to protect digital components from high voltages. For example, the optoisolator can be used to create a barrier between a computer and a printer, so that any surge of electricity in either of the two does not short the other.

The working principle of the ACPL-217-56AE optoisolator is based on a phototransistor. It consists of an infrared LED in combination with a phototransistor mounted on either side of an opaque divider. The LED emits light when electrical energy is applied and the phototransistor detects the light. When light reaches the phototransistor the transistor turns on, allowing current to pass through it. The current then flows through the opaque divider into the output side of the optoisolator. This provides the isolated output.

The ACPL-217-56AE is widely used for AC and DC digital isolators, low-voltage switching AC isolators, and active noise cancellation or avoidance isolators. On the other hand, the optoisolator is not typically used for isolation of high-voltage signals, or in applications requiring high levels of signal linearity.

When considering the use of optoisolators for a particular application, it is important to understand the different factors that affect their performance. These include the wavelength of light emitted or received, the response time of the input and output, the impedance of the output side, the dark current, the level of isolation, and the radiation resistance.

The ACPL-217-56AE optoisolator is a reliable and easy to use solution for digital or AC or DC isolation in industrial and consumer applications. The phototransistor design minimizes power consumption and provides high levels of isolation between the input and output sides. It has a wide range of applications such as AC and DC switching, relays, signal isolation, noise rejection, and comparisons. With its high degree of isolation, it makes an excellent choice for applications that need to be isolated from electrical line noise.

In conclusion, the ACPL-217-56AE optoisolator is a reliable and cost effective solution for digital signal and noise isolation. It provides galvanic isolation, is easy to use, and has a wide range of application possibilities. Its low power consumption and response time make it a highly desirable component for many digital and AC/DC isolation applications.

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