MAX14931DASE+

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Digital isolators such as the MAX14931DASE+ are commonly used in digital applications to provide galvanic isolation between two components while still providing digital communication. This allows two components in a system to reside in two different locations but opens the door for them to both communicate. In this application note, we will look at the application fields and working principles of the MAX14931DASE+.

The MAX14931DASE+ is an ideal isolator for digital logic systems because of its strong galvanic insulation up to 5000V RMS, low propagation delay, a wide operating temperature range of -40 to +85°C, and low power consumption (just 130mW). These features provide many benefits such as interference suppression for reliability and fault tolerance in digital communications. Additionally, the MAX14931DASE+ supports a wide range of digital logic signals, allowing it to work with many different devices and systems. This makes it suitable for applications such as motor controls, equipment monitoring, remote control, and automotive systems.

The working principle of the MAX14931DASE+ is based on the phenomenon of quantum tunneling which usually occurs in semiconductor-based materials. Tunneling occurs when an electron moves across a very narrow energy barrier, allowing it to jump directly through the barrier and into a higher energy level. In digital isolators, this effect results in low power consumption and low propagation delay (less than 10 nanoseconds). Additionally, a very low leakage current of 10 nA ensures that the digital circuits remain isolated from each other.

The MAX14931DASE+ supports a wide variety of digital logic signals, including TTL levels, open drain logic levels, and CMOS levels. A topology with two channels provides for unidirectional and bidirectional communication between two devices. The input and output channels are linked through the tunneling effect, resulting in low power consumption and high speed of less than 10 nanoseconds. The device is designed to handle up to four logic families, making it suitable for a wide variety of applications.

The MAX14931DASE+ supports several diagnostic features such as thermal shut down, overvoltage lockout, and undervoltage lockout. These features reduce the risk of damage to the device in the event of an overvoltage or undervoltage event. Additionally, the device has a high common mode rejection ratio (CMRR) of 60dB, which ensures excellent protection from interference. This makes the device suitable for use in noisy industrial environments.

In conclusion, the MAX14931DASE+ is an ideal digital isolator for digital logic circuits due to its high galvanic isolation, low propagation delay, wide temperature range, and low power consumption. It supports a wide range of logic families, allowing it to work with many different devices and systems. Additionally, the device is designed with several diagnostics functions to protect it from damage in the event of overvoltage or undervoltage events, and has an excellent CMRR for noise protection. These features make the MAX14931DASE+ a powerful and reliable tool for digital communication.

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