ADM2486BRWZ Isolated RS-485 Transceiver 500kbps 2.5kV Isolation ±15kV ESD 3V/5V

Product Specification

ADM2486BRWZ Isolated RS-485 Transceiver 500kbps 2.5kV Isolation ±15kV ESD 3V/5V Logic High CMR Industrial Temp for PLC/Motor Control

FEATURES

► Half-duplex, isolated RS-485 transceiver

► PROFIBUS® compliant

► ANSI EIA/TIA 485-A and ISO 8482: 1987(E) compliant

► 20 Mbps data rate

► 5 V or 3 V operation (VDD1)

► High common-mode transient immunity: >25 kV/μs

► Isolated DE status output

► Receiver open-circuit, fail-safe design

► Thermal shutdown protection

► 50 nodes on bus

► Safety and regulatory approvals

► UL 1577

► VISO = 2500 V rms for 1 minute

► IEC/CSA 62368-1

► IEC/CSA 61010-1

► DIN EN IEC 60747-17 (VDE 0884-17)

► VIORM = 560 V peak

► Operating temperature range: −40°C to +85°C

APPLICATIONS

► Isolated RS-485/RS-422 interfaces

► PROFIBUS networks

► Industrial field networks

► Multipoint data transmission systems

DESCRIPTION

The ADM2486 differential bus transceiver is an integrated, galvan ically isolated component designed for bidirectional data commu nication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI EIA/TIA-485-A and ISO 8482: 1987(E).

The device employs Analog Devices iCoupler® technology to com bine 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 a 3 V supply, and the bus side uses an isolated 5 V supply.

The ADM2486 driver has an active-high enable feature. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes mini mal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active-high receiver disable Rev. F DOCUMENT FEEDBACK TECHNICAL SUPPORT FUNCTIONAL BLOCK DIAGRAM Figure 1. feature that causes the receive output to enter a high impedance state.

The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention may cause excessive power dissipation. The part is fully specified over the industrial temperature range and is available in a 16-lead, wide body SOIC package.

INFORMATION

Drawing

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