The ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 are 3.3V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers from Analog Devices. They are compatible with 5V logic, meet EIA RS-422 and RS-485 standards, support data rates of 250kbps and 10Mbps, support half-duplex and full-duplex modes, and have low EMI and low power consumption. They are suitable for low-power RS-485/RS-422 applications such as telecommunications, industrial process control, and HVAC.
The ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 family are low‑power, differential line transceivers that operate from a single 3.3 V supply. Half‑duplex parts (ADM3483, ADM3488) support up to 250 kbps, while full‑duplex parts (ADM3485, ADM3490, ADM3491) support up to 10 Mbps. They are intended for low‑power RS‑485/RS‑422 applications such as telecom, industrial process control, and HVAC.
The handbook lists electrical characteristics, timing specifications, pin‑out diagrams, and absolute maximum ratings. Key features include shutdown mode with 2 nA current, up to 32 transceivers on a bus, and packages in 8‑lead or 14‑lead SOIC.
| Supply voltage | 3.3 V ±0.3 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Maximum data rate (half‑duplex) | 250 kbps |
| Maximum data rate (full‑duplex) | 10 Mbps |
| Receiver input impedance | 12 kΩ |
| Maximum number of transceivers on bus | 32 |
| Shutdown mode current | 0.002 µA (2 nA) |
| Driver output short‑circuit current | 250 mA |
They operate from a 3.3 V supply (±0.3 V).
Half‑duplex parts (ADM3483, ADM3488) support up to 250 kbps, while full‑duplex parts (ADM3485, ADM3490, ADM3491) support up to 10 Mbps.
Up to 32 transceivers can be connected on the bus.
The shutdown mode current is about 0.002 µA (2 nA).