Technical data sheet for the ADM2483 isolated RS‑485 transceiver, covering features, specifications and typical application circuits.
The ADM2483 is an isolated, enhanced RS‑485 transceiver that integrates a three‑channel isolator, a differential driver with three‑state output, and a differential receiver with three‑state input. It supports up to 256 nodes on a bus, a maximum data rate of 500 kbps, and operates from 2.7 V to 5.5 V logic supply and 4.7 V to 5.25 V bus supply.
Key functions include 2500 V isolation, ±2 kV ESD protection, hot‑plug and thermal‑shutdown protection, low‑power consumption (max 2.5 mA), and a built‑in power‑monitor pin. The document provides pin descriptions, timing diagrams, and typical application circuits for industrial RS‑485 networks. This manual is written in Chinese.
| Isolation Voltage | 2500 V |
|---|---|
| Maximum Data Rate | 500 kbps |
| Maximum Bus Nodes | 256 |
| ESD Protection | ±2 kV |
| Operating Temperature Range | -40 °C to +85 °C |
| Supply Current | max 2.5 mA |
| Driver Input/Output Delay | 250 ns – 620 ns |
| Receiver Input/Output Delay | 400 ns – 1050 ns |
| Output Current | -35 mA to +35 mA |
The ADM2483 provides 2500 V of isolation between its logic and bus sides.
Up to 256 transceivers can be connected to the bus.
The device supports a maximum data rate of 500 kbps.
Yes, it has an internal hot‑plug circuit that prevents data errors when the board is inserted while powered.