5 kV Signal Isolated, ESD Protected, 500 kbps, Full/Half Duplex RS-485 Transceiver

The ADM2484E is an isolated data transceiver with ±15 kV ESD protection suitable for high speed, half- or full-duplex communication on multipoint transmission lines. For half-duplex operation, the transmitter outputs and receiver inputs share the same transmission line. Transmitter Output Pin Y links externally to Receiver Input Pin A, and Transmitter Output Pin Z links externally to Receiver Input Pin B.

Designed for balanced transmission lines, the ADM2484E complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E). The device employs Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package.

The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection up to ±15 kV using the human body model (HBM). The logic side of the device can be powered with either a 5 V or a 3.3 V supply, whereas the bus side requires an isolated 3.3 V supply.

The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention causes excessive power dissipation.

Applications

* Isolated RS-485/RS-422 interfaces

* Industrial field networks

* INTERBUS

* Multipoint data transmission systems

* Isolated, RS-485/RS-422 transceiver, configurable as half- or full-duplex

* ±15 kV ESD protection on RS-485 input/output pins

* 500 kbps data rate

* Complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E)

* Suitable for 5 V or 3.3 V operation (VDD1)

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

* True fail-safe receiver inputs

* 256 nodes on the bus

* Thermal shutdown protection

* Safety and regulatory approvals

* UL 1577

* VISO = 5000 V rms for 1 minute

* IEC / EN / CSA 62368-1

* IEC / CSA 61010-1

* DIN EN IEC 60747-17 (VDE 0884-17)

* VIORM = 645 V peak

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

* Wide body, 16-lead SOIC package