Digital isolators are semiconductor devices that provide galvanic isolation between two electronic circuits. They protect applications which have digital or analog circuits that are sensitive to electrical transients, ground loops or common mode noise. The ADUM1400WSRWZ55-RL is an example of a digital isolator that offers isolation between a low voltage host device and a high-voltage load at the output. This isolation device is also EMI/RFI protected, which helps to reduce system noise for higher quality and more reliable signals.

Application Field

The ADUM1400WSRWZ55-RL is designed for low-voltage applications that require galvanic isolation between its host and its load. It is suitable for applications such as motor control, industrial automation, and power supplies. This device is also specifically designed for digital isolator applications in automotive and industrial automation markets. In particular, the ADUM1400WSRWZ55-RL is designed for high-voltage switchmode power supplies and motor control applications, where it can provide robust isolation in high-temperature environments.

Working Principle

The ADUM1400WSRWZ55-RL digital isolator utilizes an integrated circuit with isolated zero cross-over (ZCO) technology to provide a galvanic isolation barrier between a low-voltage host and a high-voltage load. This device combines signal and power isolation in a single package. It utilizes a silicon-based MEMS device which provides the isolation. The device operates by utilizing an inductive coil as a volt-second transducer to transfer an analog input signal across the isolation barrier. The isolated zero-cross-over signal which is sent across the isolation barrier is then converted back to an analog output signal on the load side. The device also features a number of built-in protection circuitries such as over-voltage, over-temperature, over-current and under-voltage protection. The over-voltage protection circuitry prevents transient voltages from damaging the device while the over-temperature and over-current protection circuitry help to protect the device from excessive or saturated output currents. The under-voltage protection circuit ensures that the device is not damaged when the voltage on the low side drops below a predefined threshold. All of these protection circuitries help to ensure the reliability and robustness of the ADUM1400WSRWZ55-RL.

Conclusion

The ADUM1400WSRWZ55-RL digital isolator is a reliable and robust isolation device that can provide galvanic isolation between low voltage hosts and high-voltage loads. Its built-in protection circuitries help to ensure its reliability in harsh environments. The device is suitable for applications such as motor control, power supplies, industrial automation and automotive markets.