ISO3086DW

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Digital isolators are electrical circuits that provide electrical insulation while providing a digital interface between two parts of a system. Isolation can provide protection from extreme noise, voltage spikes, and other interference. Digital isolators also allow a power signal to be transmitted without having to use a physical connection. This is important for applications where physical connections are difficult or impossible, such as in hazardous environments or in applications where temperature control is critical.

One type of digital isolator is the ISO3086DW. This isolation device uses an I2C bus to facilitate communication between two parts of a system—typically between two power circuits or two controllers. It features four isolated channels, which allow for both full and half-duplex communication. It also includes a module for power cycling and a fail-safe safety feature that activates circuit protection in the event of loss of communication.

The ISO3086DW operates with a supply voltage typically between 10 volts DC and 40 volts DC, and can provide protection up to 250 volts RMS. It can handle up to 25mA of current, and supports both I2C slave and master modes. The ISO3086DW also has a low-power mode, which allows it to continue operating when the supply voltage is reduced to 1.8V or lower.

The operating principle of the ISO3086DW is based on the use of electrostatic capacitance to provide electrical isolation. As current flows through the isolator’s isolating medium, an electric field is created between the inner and outer conductor plates. This electric field creates an isolated, floating ground plane between the two conductive plates, thereby providing an electrical barrier between the two circuits. On the signal side of the isolator, a series of capacitive elements serve to limit both the power and the frequency of the current passing through the isolator, and this limits the amount of interference that can be exchanged between the two circuits. This allows the two circuits to communicate without being affected by each other’s electrical or magnetic fields.

The ISO3086DW is commonly used in a variety of applications. In industrial automation, these devices are often used in motor control, power supply management, and data acquisition systems. In automotive applications, these isolators are used in airbag systems, engine control, and anti-lock brake systems. In medical devices, they are used in control systems for anesthesia and laboratory equipments. In communications systems, they are used in Bluetooth and Wi-Fi networks.

The ISO3086DW provides a safe and efficient way to transfer electrical signals without having to worry about electrical hazards or interference. Its ability to provide isolation and limit interference makes it an ideal choice for systems where reliable communication is essential. Its low power consumption, easy installation, and robust construction make it an excellent choice for applications where power consumption, cost, and ruggedness are primary considerations.

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