ADM1485JRZ-REEL

Overview

The ADM1485JRZ-REEL is a high-speed, low-power EIA RS-485 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V supply and supports data rates up to 30 Mbps. The device features a driver propagation delay of 10 ns and a receiver propagation delay of 15 ns. It provides a bus common-mode range from -7 V to +12 V and includes thermal shutdown and short-circuit protection. The component is housed in an 8-Lead SOIC package and is rated for the commercial temperature range of 0°C to 70°C.

Feature Summary

• Supports bidirectional data communication on multipoint bus transmission lines with compliance to RS-485 and RS-422 standards.
• Includes thermal shutdown circuitry that disables driver outputs during excessive power dissipation or fault conditions.
• Features fail-safe logic that guarantees a logic high output state when receiver inputs are unconnected or floating.

Applications

• Low Power RS-485 Systems
• DTE-DCE Interface
• Packet Switching

Procurement Notes

Verify the ordering suffix REEL indicates reel packaging rather than tube packaging. Confirm the J suffix corresponds to the commercial temperature range (0°C to 70°C). Ensure compatibility with standard 8-Lead SOIC footprint requirements during procurement planning.

Selection Notes

Select this component for applications requiring high-speed differential data transmission up to 30 Mbps. Verify that the system operates within the specified 5 V supply voltage limits. Consider the thermal management requirements given the BiCMOS process and potential for short-circuit currents.

Part Context

This part belongs to the ADM1485 series of RS-485 transceivers. It serves as a superior upgrade alternative to the LTC1485 model. The series offers various package options including PDIP, SOIC, and MSOP, catering to different board space and thermal constraints.

Replacement Considerations

ADM1485JRZ

FAQ

What is the common-mode voltage range for the bus?

The ADM1485 supports a bus common-mode range from -7 V to +12 V.

How does the device handle open receiver inputs?

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected or floating.

What protection mechanisms are included against faults?

The device includes thermal shutdown protection to prevent excessive power dissipation and short-circuit protection for the driver outputs.