ADM2795EBRWZ

Overview

The ADM2795EBRWZ-RL7 is a 5 kV rms isolated RS-485/RS-422 transceiver integrating iCoupler technology, Level 4 EMC protection, and ±42 V fault tolerance. It supports data rates up to 2.5 Mbps with a half-duplex architecture. The device operates on a 1.7 V to 5.5 V logic supply (VDD1) and a 3 V to 5.5 V bus supply (VDD2). It features an extended common-mode input range of −25 V to +25 V and high common-mode transient immunity exceeding 75 kV/μs. Packaged in a 16-lead wide-body SOIC (SOIC-16), it withstands IEC 61000-4-5 surge (±4 kV), EFT (±2 kV), and ESD (±15 kV air discharge).

Feature Summary

• Integrates certified Level 4 IEC 61000-4-x EMC protection directly on the RS-485 A and B bus pins.
• Provides full ±42 V AC/DC peak overvoltage fault protection on the bus interface without external components.
• Utilizes iCoupler magnetic isolation technology to combine a three-channel isolator with the transceiver in one package.
• Supports hot-swap operations with glitch-free power-up and power-down capabilities.

Applications

• Heating, ventilation, and air conditioning (HVAC) networks
• Industrial field buses
• Building automation systems
• Utility networks

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm packaging details such as reel or cut tape quantities. Ensure that the component meets the required safety certifications for the target application region. Confirm that the 16-lead wide-body SOIC footprint matches the intended PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when system designs require integrated signal isolation combined with robust electromagnetic compatibility protection. It is suitable for applications needing to eliminate discrete TVS diodes or surge protectors from the bill of materials. Verify that the operating voltage requirements align with the specified 1.7 V to 5.5 V logic and 3 V to 5.5 V bus supply ranges.

Part Context

This part belongs to the ADM2795E family of isolated RS-485 transceivers manufactured by Analog Devices Inc. The series is designed to simplify compliance with strict industrial EMC standards while providing electrical isolation between logic and bus domains. It represents a consolidated solution for harsh environment communication interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices resources for cross-reference information regarding compatible replacement devices.

FAQ

Does the ADM2795E require external transient voltage suppressors?

No, the device integrates certified Level 4 IEC 61000-4-5 surge protection and other EMC protections directly on the bus pins, eliminating the need for external TVS components.

What is the maximum short-circuit output current during a fault?

The maximum short-circuit output current is limited to ±250 mA within the protected voltage range of −42 V to +42 V.

Is the device compliant with TIA/EIA RS-485/RS-422 standards?

Yes, the ADM2795E is fully compliant with TIA/EIA RS-485/RS-422 standards when operated over its specified 3 V to 5.5 V VDD2 power supply range.