ISO7640FMDWR Isolators

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Digital Isolators are a key technology that enables the transmission of digital signals across an isolation barrier, for a variety of applications. The ISO7640FMDWR is one such example of a digital isolator that utilizes a novel design to enable the transmission of digital signals in a wide range of applications, while also providing the needed protections from over-current, high voltage, and surges.

The ISO7640FMDWR is based on a two-level conversion technology which consists of two digital I/O stages, separated by an isolated stage. The isolated stage is based on an optocoupler with cross-coupling technology, isolating the two input and output stages from each other so that a single I/O stage can be used for both digital inputs and output applications. This eliminates the need to use separate digital I/O stages for each application, resulting in cost savings.

The cross-coupling technology also ensures that a strong and reliable connection is maintained when the two sides of the isolator are separated. This is accomplished by the use of inter-coupled transistors in the isolated stage that are driven by the two I/O stages. This ensures that the isolator is not susceptible to current overloads, high voltages or surges, making it resistant to external noise.

Thanks to the two-level conversion technology, the ISO7640FMDWR provides excellent isolation performance. It has a channel-to-channel isolation of 5kV, providing a high level of protection for signals passing through the isolator. It also has a wide common-mode rejection ratio of greater than 95dB, ensuring that any common-mode noise in the system is rejected and not passed on to the next stage.

The digital isolator also features a wide operating temperature range of –40°C to +85°C. This makes it suitable for use in industrial applications where extreme temperatures are encountered. It also has a wide power supply range of 4.5V to 5.5V, allowing it to be powered from a variety of sources.

The ISO7640FMDWR is an ideal solution for applications requiring the transmission of digital signals across an isolation barrier. Its two-level conversion technology allows for a lower component count, resulting in cost savings. It also provides excellent isolation performance and a wide range of operating temperatures and power supply voltage options, making it suitable for a wide range of applications.

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