ADM1486AR-REEL7

Overview

The ADM1486AR-REEL7 is a 5 V PROFIBUS RS-485 transceiver in an 8-lead SOIC package. It supports data rates up to 30 Mbps with driver propagation delay of 11 ns and receiver propagation delay of 12 ns. The device operates from a single 5 V supply, drawing 0.8 mA when disabled and 2.0 mA when enabled. It features high impedance outputs when disabled or powered off, thermal shutdown at 150°C, and short-circuit protection limiting output current to ±200 mA. The operating temperature range is -40°C to +85°C.

Feature Summary

• Complies with EIA RS-485 and RS-422 standards for differential line transmission.
• Includes thermal shutdown circuitry that disables the driver if die temperature exceeds 150°C.
• Features fail-safe receiver logic that guarantees a logic high output state when inputs are unconnected.
• Provides high output impedance when disabled or powered down to minimize bus loading.

Applications

• Industrial field equipment
• PROFIBUS applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and lead-free status. The REEL7 designation indicates tape and reel packaging. Confirm RoHS compliance requirements with the supplier prior to purchase to ensure alignment with project specifications.

Selection Notes

Select this component for multipoint bus networks requiring bidirectional communication at speeds up to 30 Mbps. Ensure the system design accommodates the 5 V power supply requirement and the -40°C to +85°C industrial temperature range. Verify that the 8-lead SOIC package dimensions fit the available PCB footprint constraints.

Part Context

This part belongs to the ADM1486 series of RS-485/RS-422 transceivers manufactured by Analog Devices. It serves as a high-speed interface solution for industrial communication buses. The AR variant specifically denotes the industrial temperature grade (-40°C to +85°C) and standard plastic SOIC packaging.

Replacement Considerations

The datasheet identifies the SN65ALS1176 as a predecessor device. No other direct substitute part numbers are documented in the provided source material.

FAQ

What is the fail-safe behavior of the ADM1486 receiver?

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

How does the device protect against excessive power dissipation?

It utilizes thermal shutdown circuitry that senses die temperature and forces the driver outputs into a high impedance state if the temperature rises above 150°C.

What is the maximum number of transceivers supported on the bus?

Up to 50 transceivers may be connected simultaneously on a bus, although only one driver should be enabled at any given time.