ADUM5240ARZ

Overview

The ADUM5240ARZ is a dual-channel digital isolator from Analog Devices, featuring an integrated isoPower DC/DC converter. It provides 2500 Vrms isolation voltage with unidirectional signal transmission at data rates up to 1 Mb/s. The device operates on supply voltages between 2.7 V and 5.5 V, consuming 3.3 mA of operating current. It exhibits a propagation delay of 70 ns and supports a power dissipation of 50 mW. Designed for robust performance, it offers a common-mode transient immunity of 25 kV/µs. The component is housed in a narrow-body 8-lead SOIC package and functions within a temperature range of -40°C to +105°C.

Feature Summary

• Integrates an isolated DC-to-DC converter providing regulated 5 V/10 mA output for the secondary side.
• Utilizes magnetic coupling technology to achieve high-voltage electrical isolation between channels.
• Supports dual independent signal paths with unidirectional channel directionality.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced insulation barriers
• Power metering circuits with isolated communication interfaces

Procurement Notes

Verify the specific suffix 'ARZ' to confirm the lead-free RoHS-compliant variant in the SOIC-8 package. Confirm that the integrated DC/DC converter meets the target system's power budget requirements. Ensure input and output logic levels are compatible with the 2.7 V to 5.5 V operating range. Validate thermal management capabilities given the 50 mW power dissipation specification.

Selection Notes

Select this component when both signal isolation and isolated power delivery are required in a compact form factor. It is suitable for applications where space constraints preclude separate isolated power supplies. Consider the 1 Mb/s data rate limit for high-speed communication needs. Evaluate the 2500 Vrms isolation rating against the system's safety standards and creepage distance requirements.

Part Context

This part belongs to the ADUM5240 series of dual-channel digital isolators. It distinguishes itself by embedding an isoPower converter, eliminating the need for external isolated power components. The series targets general-purpose interface applications requiring reliable signal transmission across potential differences.

Replacement Considerations

Direct substitutes include other ADUM524x variants with different packaging or speed options. Cross-family replacements may require evaluating isolation voltage ratings and power consumption differences. Verify pin compatibility and thermal characteristics before substituting with non-integrated isolator solutions.