ADM2795EARWZ

Overview

The ADM2795EARWZ is a robust, 5 kV rms isolated RS-485/RS-422 transceiver featuring integrated Level 4 EMC protection and ±42 V AC/DC peak fault tolerance on the bus pins. It utilizes iCoupler technology to combine a three-channel isolator with the transceiver in a single package. The device supports data rates up to 2.5 Mbps and operates over an extended temperature range of −40°C to +125°C. Electrical specifications include a logic supply (VDD1) range of 1.7 V to 5.5 V and a bus supply (VDD2) range of 3 V to 5.5 V. It provides high common-mode transient immunity exceeding 75 kV/μs and supports up to 256 bus nodes.

Feature Summary

• Integrates certified IEC 61000-4-x Level 4 EMC protection for surge, EFT, and ESD directly on the RS-485 A and B bus pins.
• Provides full ±42 V AC/DC peak fault protection on the RS-485 bus pins without requiring external transient voltage suppressors.
• Features 5 kV rms reinforced isolation using iCoupler technology with safety approvals including UL 1577 and VDE.
• Supports hot swap capability with glitch-free power-up and power-down sequences.

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 type and reel specifications. Ensure that the component meets all required regulatory certifications for your target market, such as UL or VDE, by checking the official safety certificates. Confirm availability through authorized distributors as stock levels fluctuate.

Selection Notes

Select this component when designing isolated RS-485 interfaces that require built-in IEC 61000-4-x compliance and high-voltage fault protection. It is suitable for applications needing operation with low-voltage logic supplies down to 1.7 V on the VDD1 pin. Consider the 16-lead wide-body SOIC package constraints and thermal dissipation requirements for your PCB layout.

Part Context

The ADM2795E series represents Analog Devices' solution for harsh industrial environments where external protection components are undesirable. It consolidates signal isolation, transceiver functionality, and electromagnetic compatibility into one package, reducing bill of materials and board space compared to discrete solutions.

Replacement Considerations

The non-isolated ADM3095E offers similar EMC protection but lacks the 5 kV rms isolation barrier. Designers must evaluate if galvanic isolation is strictly required for their application before substituting.