ADG467BRZ

Transzorb, or transient voltage suppressor (TVS), is a type of mixed technology device used to protect semiconductor circuits from potentially damaging transients. The ADG467BRZ is a special type of TVS device which uses a combination of surge voltage clamping, ESD protection, and low-ESR capacitive networks to provide high reliability protection for vulnerable circuits. In this article, we will go over the application field and working principle of the ADG467BRZ TVS device.

Application Field

The ADG467BRZ TVS device is designed for use in automotive, medical, consumer, and industrial applications. Due to its wide range of features, including its ability to protect fragile circuits from overvoltage transients, it is ideal for applications where high-quality and reliable protection is required. Examples of such applications include automotive diagnostics systems, medical imaging equipment, consumer electronics, and industrial machinery.

In automotive applications, the ADG467BRZ is suitable for protecting onboard electronics such as engine control units, airbag sensors, and navigation systems. Its ESD and overvoltage protection capabilities make it a preferred choice in electronic control unit (ECU) protection. In medical applications, the device is used to protect delicate electronic components found in advanced medical imaging systems. In consumer applications, it is commonly used to protect sensitive circuits from potentially damaging transients. And finally, it is used in industrial machinery to protect against ESD and overvoltage transients.

Working Principle

The ADG467BRZ is an all-in-one surge and ESD protection device. It uses a combination of voltage clamping and ESD protection to provide high reliability protection against overvoltage transients. The device is designed with dual clamping, one for ESD events and the other for surge events. The ESD clamping network is designed to protect sensitive circuits from electrostatic discharges, while the surge clamping network is designed to protect against overvoltage transients.

The voltage clamping is designed to limit the maximum voltage seen by the protected circuits. The device’s ESD protection feature provides protection against electrostatic discharges with up to ±8kV of contact and air discharge protection. The surge clamping network integrates a zener diode, ESD diodes, and low ESR capacitors, which limit the peak voltage seen by the protected circuits. This ensures that any overvoltage transients are quickly clamped, preventing them from damaging sensitive components.

The ADG467BRZ is also designed with thermal shutdown, reverse-polarity protection, and overcurrent protection features. The reverse-polarity protection feature prevents the device from being damaged if the power supply is connected with reversed polarity, while the overcurrent protection feature prevents the device from being damaged in the event of an overcurrent condition. The thermal shutdown feature ensures that the device is protected if it is exposed to temperatures in excess of the device’s operating range. The combination of these features makes the ADG467BRZ a reliable and robust protection device for vulnerable circuits.

Conclusion

The ADG467BRZ is a mixed technology TVS device designed for use in automotive, medical, consumer, and industrial applications. Its combination of surge voltage clamping, ESD protection, and low-ESR capacitive networks make it an ideal choice for high-reliability protection of sensitive components. The device is designed with features such as reverse-polarity protection, overcurrent protection, thermal shutdown, and dual clamping. This ensures that the protected circuits are shielded from overvoltage transients, ESD, and other potentially damaging conditions.