ADM485AQ

Drivers, Receivers, Transceivers Overview

The ADM485AQ is a low-power, full-duplex EIA RS-485 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V supply and supports data rates up to 5 Mbps. The device features a bus common-mode range of −7 V to +12 V and includes thermal shutdown protection against excessive power dissipation. Driver propagation delay is typically 10 ns, while receiver propagation delay is typically 15 ns. It complies with EIA RS-485 and RS-422 standards.

Drivers, Receivers, Transceivers Feature Summary

• Supports bidirectional data communication on multipoint bus transmission lines
• Includes thermal shutdown circuitry to prevent damage during fault conditions
• Provides fail-safe receiver functionality for open-circuit inputs
• Features high output impedance when disabled to minimize bus loading

Drivers, Receivers, Transceivers Applications

• Low power RS-485 systems
• DTE/DCE interface
• Packet switching
• Local area networks (LANs)
• Data concentration

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'AQ' against official documentation, as standard listings often use 'AN' or 'AR'. Confirm temperature range specifications match industrial requirements. Ensure package type aligns with PCB layout constraints. Check RoHS compliance status if required by project standards. Validate pinout compatibility with existing designs.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring reliable half-duplex communication over twisted pair cables. Consider the 5 Mbps data rate limit and 32-node bus capacity. Evaluate thermal performance in enclosed environments due to the shutdown feature. Ensure supply voltage stability within the specified 5 V tolerance. Verify interface logic levels match system requirements.

Drivers, Receivers, Transceivers Part Context

The ADM485 series serves as a robust solution for industrial communication networks. It replaces older components like the LTC485 with improved speed and lower power consumption. The device integrates both driver and receiver functions in a compact package. It is widely used in automation and control systems requiring long-distance data transmission.

Drivers, Receivers, Transceivers Replacement Considerations

ADM485AN

Drivers, Receivers, Transceivers FAQ

What is the fail-safe feature of the ADM485?

The receiver guarantees a logic high output state when the inputs are unconnected or floating.

How does the thermal shutdown work?

It disables the driver outputs when die temperature reaches 150°C and re-enables them at 140°C.

What is the maximum number of transceivers on the bus?

Up to 32 transceivers can be connected simultaneously on a single bus.