ADM2863EBRNZ-RL7

Overview

The ADM2863EBRNZ-RL7 is a 5.7 kV RMS signal and power isolated RS-485 transceiver manufactured by Analog Devices Inc. It operates with a maximum data rate of 500 kbps and supports full duplex communication within a single driver and receiver configuration. The device functions on a primary supply voltage (VCC) ranging from 3 V to 5.5 V and a logic I/O supply (VIO) between 1.7 V and 5.5 V. It features an integrated isolated DC-to-DC converter providing a selectable VISO output of either 3.3 V or 5 V. The component offers ±15 kV IEC ESD protection, high common-mode transient immunity of 250 kV/µs, and operates across a temperature range of −40°C to +105°C in a 28-lead SOIC_W package.

Feature Summary

• Integrated isolated DC-to-DC converter eliminates the need for external isolated power supplies.
• Cable invert feature allows correction of reversed A/B bus connections while maintaining fail-safe performance.
• Robust electromagnetic compatibility with EN 55032 Class B compliance on standard PCB layouts.
• 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
• Energy meters

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to the reel packaging format required for automated assembly processes. Confirm that the RN-28-11 package designation matches the footprint constraints of the target printed circuit board design. Ensure all regulatory approvals, such as UL 1577 and IEC standards, meet the safety requirements of the final equipment enclosure.

Selection Notes

Select this model specifically for applications requiring low-speed data transmission up to 500 kbps where electromagnetic interference control is critical. Choose this variant over higher-speed options when long cable runs necessitate slew-rate limiting. Verify that the system requires full duplex operation and benefits from the integrated isolation barrier to protect sensitive logic circuits from high-voltage bus faults.

Part Context

This component belongs to the ADM286x family of isolated transceivers, which includes the ADM2861E, ADM2865E, and ADM2867E. These devices share identical pinouts and core isolation architectures but differ in data rates and duplex modes. The ADM2863E represents the full-duplex, 500 kbps variant designed for robust industrial environments requiring high noise immunity and simplified power management through integrated isolation.

Replacement Considerations

ADM2861EBRNZ-RL7: Half-duplex variant with identical speed and isolation ratings.

FAQ

How does the Cable Invert feature function?

The Cable Invert feature allows the user to correct reversed cable connections on the A, B, Y, and Z bus pins. This is achieved via dedicated INVR and INVD pins that invert the receiver and driver signals respectively, ensuring proper data interpretation without rewiring.

What is the purpose of the VSEL pin?

The VSEL pin selects the output voltage set point for the internal isolated DC-to-DC converter. Connecting VSEL to VISO sets the output to 5.0 V, while connecting it to GNDISO sets the output to 3.3 V.

Does the device support hot swapping?

Yes, the ADM2863E supports full hot swap operations. It ensures glitch-free power-up and power-down sequences, allowing the device to be connected or disconnected from a live bus without causing data corruption or system errors.