500kbps isolated RS-485/RS-422 transceiver
The ADM2484E is an isolated RS‑485/RS‑422 transceiver with ±15 kV ESD protection, configurable for half‑ or full‑duplex operation and capable of 500 kbps data rates. It supports 5 V or 3.3 V supply voltages and includes thermal shutdown and true fail‑safe receiver inputs for robust industrial networking.
The document provides detailed electrical specifications, timing parameters, package dimensions, and recommended PCB layout practices. It also outlines safety‑related insulation ratings, magnetic‑field immunity, and typical application circuits for up to 256 nodes on a bus.
| Data Rate | 500 kbps |
|---|---|
| Logic‑Side Supply Current (IDD1) unloaded | 2.0 mA |
| Bus‑Side Supply Current (IDD2) unloaded | 3.0 mA |
| Differential Output Voltage (|VOD|) typical | 2.0 V |
| Isolation Voltage | 5000 V rms (1‑minute) |
| Operating Temperature Range | -40°C to +85°C |
| ESD Protection | ±15 kV (HBM) |
| Maximum Working Insulation Voltage | 846 V peak |
The ADM2484E supports a data rate of up to 500 kbps.
Up to 256 transceivers can be connected on the bus.
It provides 5000 V rms isolation for 1 minute per UL1577.
The device can operate with either a 5 V or a 3.3 V supply on the logic side.