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ADM2490E

Analog Devices
Part Number ADM2490E
Manufacturer Analog Devices
Description Isolated RS-485 Transceiver
Published Jan 12, 2007
Detailed Description High Speed, ESD-Protected, Full-Duplex, iCoupler Isolated RS-485 Transceiver ADM2490E FEATURES Isolated, full-duplex RS...
Datasheet PDF File ADM2490E PDF File

ADM2490E
ADM2490E


Overview
High Speed, ESD-Protected, Full-Duplex, iCoupler Isolated RS-485 Transceiver ADM2490E FEATURES Isolated, full-duplex RS-485/RS-422 transceiver ±8 kV ESD protection on RS-485 input/output pins 16 Mbps data rate Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E) Suitable for 5 V or 3 V operation (VDD1) High common-mode transient immunity: >25 kV/μs Receiver has open-circuit, fail-safe design 32 nodes on the bus Thermal shutdown protection Safety and regulatory approvals UL recognition: 5000 V rms isolation voltage for 1 minute per UL 1577 VDE certificate of conformity DIN EN 60747-5-2 (VDE 0884-10 Part 2): 2003-01 DIN EN 60950 (VDE 0805): 2001-12; EN 60950: 2000 VIORM = 848 V peak Operating temperature range: −40°C to +105°C Wide body, 16-lead SOIC package APPLICATIONS Isolated RS-485/RS-422 interfaces Industrial field networks INTERBUS Multipoint data transmission systems GENERAL DESCRIPTION The ADM2490E is an isolated data transceiver with ±8 kV ESD protection that is suitable for high speed, full-duplex communication on multipoint transmission lines.
It is designed for balanced transmission lines and complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E).
The device employs Analog Devices, Inc.
, iCoupler® technology to combine a 2-channel isolator, a threestate 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 to ±8 kV GALVANIC ISOLATION 05889-001 FUNCTIONAL BLOCK DIAGRAM VDD1 VDD2 ADM2490E Y TxD Z A RxD B GND1 Figure 1.
GND2 using the human body model (HBM).
The logic side of the device can be powered with either a 5 V or a 3 V supply, whereas the bus side requires an isolated 5 V supply.
The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention could cause excessive power dissipation.
The ADM2490E is ava...


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