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ADM2481

Analog Devices
Part Number ADM2481
Manufacturer Analog Devices
Description Isolated RS-485 Transceiver
Published Jan 11, 2017
Detailed Description Data Sheet FEATURES RS-485 transceiver with electrical data isolation Complies with ANSI TIA/EIA-485-A and ISO 8482: 198...
Datasheet PDF File ADM2481 PDF File

ADM2481
ADM2481

Overview
Data Sheet FEATURES RS-485 transceiver with electrical data isolation Complies with ANSI TIA/EIA-485-A and ISO 8482: 1987(E) 500 kbps data rate 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 True fail-safe receiver inputs Chatter-free power-up/power-down protection 256 nodes on bus Thermal shutdown protection Safety and regulatory approvals UL recognition: 2500 V rms for 1 minute per UL 1577 VDE certificates of conformity DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 VIORM = 560 V peak Operating temperature range: −40°C to +85°C APPLICATIONS Low power RS-485/RS-422 networks Isolated interfaces Building control networks Multipoint data transmission systems GENERAL DESCRIPTION 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 Half-Duplex, iCoupler Isolated RS-485 Transceiver ADM2481 FUNCTIONAL BLOCK DIAGRAM VDD1 VDD2 ADM2481 DE GALVANIC ISOLATION 08920-001 TxD RxD RE GND1 GND2 Figure 1.
A B to form a differential input/output (I/O) port.
When the driver is disabled or when VDD1 or ...


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