ADUM1412BRWZ

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Digital isolators are a type of electronic device that is used to provide electrical isolation between two components, while allowing the two to interact. The ADUM1412BRWZ Digital Isolator is one such device, used in a variety of applications.

Application Field

The ADUM1412BRWZ Digital Isolator is a high-speed, low-voltage digital isolator suitable for use in industrial and medical applications. It offers a wide range of isolation voltages, from 5kV to 50kV, and operating temperatures of between -55°C and 150°C. It is capable of transferring two digital, 1-bit channels at data rates up to 100Mbps. It has a fast response time of 750µs typical, and a low on-resistance of <1Ω. It has an integrated ESD protection circuit, and features over-temperature protection.

The ADUM1412BRWZ is designed primarily for use in servo systems, motor drives, battery management systems (BMS), intelligent power modules (IPMs) and in medical instrumentation. It is ideal for applications where reliability, precise timing and high switching speeds are required.

Working Principle

The ADUM1412BRWZ Digital Isolator functions by transmitting data signals between two circuits that are electrically isolated from one another. The isolator is divided into two isolated parts, each connected to separate circuits. The input side of the isolator is linked to the sending circuit, while the output side is connected to the receiving circuit.

When a signal is transmitted from the sending circuit, it passes to the input side of the isolator, where it is detected by an LED driver. The LED output is then processed by a photodiode which translates the signal into an electrical current on the output side of the isolator. The signal is then transmitted to the receiving circuit. This process is known as optical coupling, and it is what allows the two circuits to interact, while maintaining electrical isolation.

The ADUM1412BRWZ also includes a galvanic isolation system, which ensures that the two circuits cannot interact with each other in any way other than through the signal transmission. In the event that one circuit experiences a surge or power failure, the other will be unaffected.

Conclusion

The ADUM1412BRWZ Digital Isolator is a versatile device that provides reliable data transmission between two isolated circuits. It can operate over a wide range of isolation voltages and temperatures and is capable of transferring two digital, 1-bit channels at rates of up to 100Mbps. It is designed primarily for use in servo systems, motor drives, BMS, IPMs and in medical instrumentation.

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