ADUM1234BRWZ

Overview

The ADUM1234BRWZ is an isolated, precision half-bridge gate driver utilizing Analog Devices iCoupler technology. It provides independent and isolated high-side and low-side outputs within a single package. The device integrates high-speed CMOS logic with monolithic transformer technology to achieve galvanic isolation. Key electrical specifications include a peak output current of 0.1 A, propagation delays of 25 ns for both rise and fall times, and a maximum operating temperature of +105 °C. It operates within a supply voltage range of 3 V to 18 V and features an insulation voltage rating of 2.5 kVrms. The component is housed in a 16-pin SOIC-W package.

Feature Summary

• Provides independent high-side and low-side gate drive outputs with full galvanic isolation
• Integrates high-speed CMOS and monolithic transformer technology for signal transmission
• Features precise timing characteristics with symmetric rise and fall times

Applications

• Isolated power supply control circuits
• Motor drive systems requiring half-bridge configurations
• Industrial automation equipment with isolated interfaces

Procurement Notes

Verify the specific suffix (e.g., -RL) against the required packaging format, as reel quantities differ from tube packaging. Confirm that the 2.5 kVrms isolation rating meets the safety requirements of the target application environment. Ensure the 0.1 A output current capability is sufficient for the connected gate load. Check for any RoHS compliance documentation relevant to the manufacturing date code.

Selection Notes

Select this component when a compact, integrated solution for half-bridge driving is required without external isolation barriers. The iCoupler technology offers advantages over magnetic or optical isolators by providing better thermal stability and smaller footprint. Consider the 0.1 A drive strength; if higher peak currents are needed for larger MOSFETs or IGBTs, a higher-current variant such as the ADUM4223 series should be evaluated instead.

Part Context

This part belongs to the ADuM123x family of isolated gate drivers. These devices are designed to replace traditional discrete solutions involving separate isolators and push-pull drivers. The family leverages silicon dioxide (SiO2) based capacitive coupling technology to ensure reliable data transmission across isolation barriers while maintaining high common-mode transient immunity.

Replacement Considerations

Direct functional substitutes within the same isolation class include the ADUM1233BRWZ for single-channel applications or the ADUM4223WBRWZ for higher current requirements. Verify pin compatibility and isolation voltage ratings before substitution.