ADM2481

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 kb...