ADM2485BRWZ

Overview

The ADM2485BRWZ is a high-speed, galvanically isolated RS-485 transceiver manufactured by Analog Devices Inc. It integrates an isolated power supply using magnetic coupling technology to eliminate the need for external isolation components. The device supports bidirectional data communication on multipoint buses with a maximum data rate of 16 Mb/s. It operates within a supply voltage range of 2.7 V to 5.5 V and features a propagation delay of 45 ns. The component provides 2500 Vrms insulation voltage and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a magnetic coupling-based isolated power supply for compact design
• Provides galvanic isolation for safe bidirectional data communication
• Supports high-speed data transmission up to 16 Mb/s
• Designed for robust operation in multipoint bus environments

Applications

• Industrial automation control systems
• Building automation networks
• Process control instrumentation
• Factory floor communication interfaces

Procurement Notes

Verify the specific package variant (tube or reel) required for your assembly process, as ordering suffixes indicate packaging differences. Confirm current availability status with authorized distributors, as supply constraints may affect lead times. Ensure the selected part matches the required voltage and isolation specifications for your target application environment before finalizing procurement.

Selection Notes

Select this component when a single-chip solution for isolated RS-485 communication is required. It is suitable for designs needing high data rates and integrated isolation without external transformers. Consider the SOIC-16 package dimensions and thermal characteristics during PCB layout. Verify compatibility with system voltage levels and noise immunity requirements for the intended industrial environment.

Part Context

This device belongs to the ADM2485 series of isolated transceivers from Analog Devices. It is designed to replace traditional discrete isolation solutions by combining the transceiver and isolated power supply in one package. The series targets applications requiring reliable, high-speed serial communication in electrically noisy industrial settings.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio that offer similar isolation ratings and data speeds. Verify that any substitute maintains the same package outline and thermal performance to ensure seamless integration into existing board layouts.