ADM2481BRWZ Isolated RS-485 by Analog Devices

Status: Production
Series: ADM2481
RoHS: Compliant
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The ADM2481 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on balanced, multipoint bus transmission lines. It complies with ANSI EIA/TIA-485-A and ISO 8482: 1987(E). Using iCoupler® technology from Analog Devices, Inc., the ADM2481 combines a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. The logic side of the device is powered with either a 5 V or 3 V supply, and the bus side uses a 5 V supply only.The ADM2481 is slew-limited to reduce reflections with improperly terminated transmission lines. The controlled slew rate limits the data rate to 500 kbps. The input impedance of the device is 96 kΩ, allowing up to 256 transceivers on the bus. Its driver has an active-high enable feature. The driver differential outputs and receiver differential inputs are connected internally to form a differential I/O port. When the driver is disabled or when VDD1 or VDD2 = 0 V, this imposes minimal loading on the bus. An active-high receiver disable feature, which causes the receiver output to enter a high impedance state, is provided as well.The receiver inputs have a true fail-safe feature that ensures a logic-high receiver output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and at the point when communication ends.Current limiting and thermal shutdown features protect against output short circuits and bus contention situations that might cause excessive power dissipation. The part is fully specified over the industrial temperature range of −40°C to +85°C and is available in a 16-lead, wide body SOIC package.

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Newark Electronics
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Farnell
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Features

RS-485 transceiver with electrical data isolation 
Complies with ANSI TIA/EIA-485-A and ISO 8482: 1987(E)
Slew rate-limited driver outputs
Low power operation: 2.5 mA maximum 
Suitable for 5 V or 3.3 V operations (VDD1)
High common-mode transient immunity: >25 kV/μs
See data sheet for additional features

Alternative Descriptions

Isolator RS-485 Transceiver I. | Analog Devices
Transceiver, Rs422, Rs485, 1Tx, 1Rx | Newark Electronics
TRANSCEIVER, RS422, RS485, 1TX, 1RX | element14
INTERFACE - MISCELLANEOUS | Richardson RFPD


Frequently Asked Questions

Where can I find additional details, specifications and documents for a ADM2481BRWZ?

Additional datasheets, footprints and schematics for ADM2481BRWZ are listed on our Part Details page. You can also find images and similar parts to ADM2481BRWZ on this page.

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What category does ADM2481BRWZ fall under?

The ADM2481BRWZ is listed under Isolated RS-485.

Can I view similar or alternative parts?

You can view similar parts to ADM2481BRWZ when available in the Isolated RS-485 range under the specifications section at the bottom of the details page.

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Is the ADM2481BRWZ RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and Richardson RFPD have stock available or on a lead time for ADM2481BRWZ.

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