ADM2582EBRWZ

Overview

The ADM2582EBRWZ is a fully integrated signal and power isolated RS-485 transceiver manufactured by Analog Devices Inc. It features isoPower technology for magnetic coupling, providing 2500 Vrms isolation without external DC/DC blocks. The device supports data rates up to 16 Mbps with ±15 kV ESD protection on the bus pins. It operates within a supply voltage range of 3 V to 5.5 V and includes current limiting and thermal shutdown for fault protection. The component is housed in a 20-pin SOIC-W package and complies with ANSI/TIA/EIA-485-A-98 standards.

Feature Summary

• Integrates isoPower technology to provide simultaneous signal and power isolation via magnetic coupling, eliminating the need for external isolated DC/DC converters.
• Provides robust electromagnetic interference immunity with high common-mode transient immunity exceeding 25 kV/µs and ±15 kV ESD protection on the bus lines.
• Incorporates built-in safety mechanisms including current limiting and thermal shutdown to prevent damage from output shorts or excessive power dissipation during bus contention.

Applications

• Isolated RS-485 and RS-422 interface circuits
• Industrial fieldbus networks requiring galvanic isolation
• Multi-point data transmission systems with high noise environments

Procurement Notes

Verify the specific suffix (e.g., REEL7) against the required packaging format, as standard tubes and reels may differ. Confirm that the 20-pin SOIC-W package matches the target PCB footprint. Ensure the design accounts for the 230 mA operating current typical of the integrated power stage. Validate compliance requirements such as UL 1577 certification if used in regulated industrial equipment.

Selection Notes

Select this component when a compact, single-supply solution for isolated RS-485 communication is required. It is suitable for applications needing high-speed data transfer at 16 Mbps with significant noise rejection capabilities. Consider the thermal performance and current consumption of the integrated power isolator compared to discrete solutions. Verify that the 2500 Vrms isolation barrier meets the system's safety voltage requirements.

Part Context

The ADM2582E series belongs to Analog Devices' portfolio of digital isolators utilizing proprietary isoPower technology. This family addresses the complexity and size constraints of traditional isolated interfaces by combining signal and power channels in a single package. The ADM2582EBRWZ specifically targets the RS-485 market, offering a drop-in replacement for non-isolated transceivers while enhancing system reliability and noise immunity.

Replacement Considerations

Direct pin-compatible replacements within the same isoPower family include the ADM2587E series for differential signaling variations. For non-isolated alternatives, standard RS-485 transceivers like the MAX13487 can be considered if isolation is not required, though system architecture changes will be necessary.

FAQ

Does the ADM2582EBRWZ require an external isolated DC/DC converter?

No, the device integrates isoPower technology which transfers power magnetically through the isolation barrier, eliminating the need for external isolated power supplies.

What is the maximum data rate supported by this transceiver?

The ADM2582EBRWZ supports data rates up to 16 Mbps, complying with ANSI/TIA/EIA-485-A-98 standards.