The ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E are RS-485/RS-422 transceivers from Analog Devices. They are 3.3 V, ±15 kV ESD protected, half- and full-duplex, and support data rates of 250 kbps, 2.5 Mbps, and 12 Mbps. They can support up to 32 nodes on the bus and have open-circuit, fail-safe design. They also have a common-mode input range of −7 V to +12 V, thermal shutdown, and short-circuit protection. They are available in 8-lead and 14-lead narrow SOIC packages with a 75176 pinout.
The ADM3483E, ADM3486E, ADM3488E, ADM3490E, and ADM3491E are 3.3 V, low‑power RS‑485/RS‑422 transceivers with up to +15 kV ESD protection. They support half‑duplex (ADM3483E, ADM3486E) or full‑duplex (ADM3488E, ADM3490E, ADM3491E) operation and are designed for balanced data transmission on multipoint bus lines.
Key features include a common‑mode input range of –7 V to +12 V, up to 32 nodes on a bus, thermal shutdown, short‑circuit protection, and availability in 8‑lead and 14‑lead narrow SOIC packages. Detailed driver and receiver timing specifications, pin configurations, and absolute maximum ratings are provided.
| Maximum data rate (ADM3483E/ADM3488E) | 250 kbps |
|---|---|
| Maximum data rate (ADM3486E) | 2.5 Mbps |
| Maximum data rate (ADM3490E/ADM3491E) | 12 Mbps |
| Supply voltage range | 3.0 V to 3.6 V |
| ESD protection (RS‑485 pins) | +15 kV |
| Common‑mode input range | –7 V to +12 V |
| Package options | 8‑lead and 14‑lead narrow SOIC |
The ADM3490E supports a maximum data rate of 12 Mbps.
Up to 32 nodes can be connected on the bus.
The RS‑485 pins have +15 kV ESD protection, while all other pins have +4 kV protection.