CNW82

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Optoisolators are optoelectronic devices which provide electrical isolation between input and output circuits, protecting sensitive control circuits from high voltage, inductive spikes, and transients in a production or laboratory environment. One of the most popular of these is the CNW82 transistor/photovoltaic output optoisolator, designed primarily for use as a high-voltage or low-power analog interface.

At the heart of the CNW82 optoisolator is a monolithic heart, a semi-insulating substrate with two layers of active circuit layers. The first layer consists of a light source, usually an LED, surrounded by an N-channel FET, while the second layer contains the photovoltaic diode, along with a reverse-biased valence shell for ESD protection. The layers are separated by an electrical isolation barrier, which provides a high degree of electrical isolation between the input and output.

The LED light source is driven with a current of usually 10 to 20mA, depending on the specific application. This current produces photons, which are absorbed by the photovoltaic diode, creating an open-circuit voltage of typically a few volts. As this voltage is applied to the optoisolator’s internal circuits, they begin to switch, allowing an electrical signal to control an external circuit.

The photovoltaic output of the CNW82 optoisolator also offers excellent noise immunity, with high common-mode rejection ratios and very high transient immunity. In addition, the optoisolator is highly resistant to electrical transients, making it ideal for use in power systems and motor control applications. The optoisolator also includes protection against reverse polarity connections, eliminating the risk of damage to the optoisolator.

The CNW82 optoisolator can be used in many applications, including in generator excitation systems, power supply protection, and motor control. Its ability to provide excellent electrical isolation makes it well-suited for applications where leakage currents posed a risk of damage, vibration, or noise. The optoisolator’s high current capability also makes it ideal for use in power circuits. Its photovoltaic output also makes it useful in a wide range of applications, including in medical, automotive, and industrial systems.

The CNW82 optoisolator is an excellent choice for many situations, offering excellent electrical isolation, high current capability, and a photovoltaic output. It is a rugged and reliable device, and is suitable for use in a wide range of applications. The optoisolator’s rugged construction ensures it will withstand the rigors of use in a production or laboratory environment, making it ideal for use in systems that must function reliably regardless of environmental conditions.

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