ADM1490EBRZ

Overview

The ADM1490EBRZ is a full-duplex RS-485/RS-422 transceiver designed for high-speed communication in multipoint transmission lines. It supports data rates up to 16 Mbps and operates from a single 5 V power supply (4.75 V to 5.25 V). The device features ±8 kV ESD protection on I/O pins, open-circuit fail-safe logic, and thermal shutdown protection. It includes one driver and one receiver with a 12 kΩ input impedance, allowing up to 32 nodes on the bus. The component is housed in an 8-lead narrow body SOIC package and functions within a temperature range of −40°C to +85°C.

Feature Summary

• Full-duplex operation supporting simultaneous transmission and reception on balanced transmission lines.
• Integrated electrostatic discharge protection providing ±8 kV human body model tolerance on differential pins.
• Fail-safe receiver design ensures a logic high output state when inputs are unconnected or floating.
• Thermal shutdown circuitry protects against excessive power dissipation by forcing outputs to a high impedance state during fault conditions.

Applications

• High-speed motor control applications requiring robust communication interfaces.
• Industrial field networks utilizing RS-485/RS-422 standards.
• Multipoint data transmission systems with multiple nodes on a single bus.
• Single-ended-to-differential signal conversion for noisy environments.

Procurement Notes

Verify the specific ordering suffix to confirm the package type and reel configuration. The 'BRZ' suffix indicates an 8-lead standard small outline package that is RoHS compliant. Confirm compatibility with the required PCB footprint and soldering profile before integration into the final assembly design.

Selection Notes

Select this component for designs requiring full-duplex communication at speeds up to 16 Mbps. Ensure the system operates within the specified 5 V supply voltage range. Consider the 8-lead SOIC package constraints for board space. Verify that the application environment stays within the industrial temperature limits defined in the specifications.

Part Context

This part belongs to the ADM1490E/ADM1491E series manufactured by Analog Devices. The ADM1490E variant specifically provides the 8-lead package options, while the ADM1491E offers 14-lead and 10-lead packages. Both variants share identical electrical characteristics and functional capabilities for RS-485/RS-422 applications.

Replacement Considerations

Direct pin-compatible replacements within the same family include the ADM1490EBRMZ, which utilizes an 8-lead MSOP package instead of the SOIC form factor. Other variants like the ADM1491EBRZ offer different pin counts and are not directly interchangeable without schematic modification.