ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 are low power, 3.3V supply RS-485/RS-422 transceivers that are interoperable with 5V logic and compliant with EIA RS-422 and RS-485 standards over the full common-mode range. The products offer multiple data rate options and support both half-duplex and full-duplex modes. ADM3483 and ADM3488 have reduced slew rates for low electromagnetic interference. In shutdown mode, ADM3483/ADM3485/ADM3491 have a supply current of only 2nA. Up to 32 transceivers can be supported on the bus, with a bus common-mode range of -7V to +12V. The products are suitable for low power RS-485/RS-422 applications such as telecom, industrial process control, and HVAC.
The ADM3483, ADM3485, ADM3488, ADM3490 and ADM3491 are low‑power differential line transceivers that operate from a single 3.3 V supply. They support half‑duplex (ADM3483, ADM3485) or full‑duplex (ADM3488, ADM3490, ADM3491) communication and include slew‑rate‑limited drivers to reduce EMI.
The devices offer data rates up to 250 kbps for the half‑duplex parts and up to 10 Mbps for the full‑duplex parts, support up to 32 transceivers on a bus, and feature a shutdown mode with a 2 nA supply current. Detailed pin configurations, timing specifications, and absolute maximum ratings are provided for design integration.
| Supply Voltage | 3.3 V |
|---|---|
| Data Rate (ADM3483/ADM3488) | 250 kbps |
| Data Rate (ADM3485/ADM3490/ADM3491) | 10 Mbps |
| Shutdown Current | 2 nA |
| Receiver Input Impedance | 12 kΩ |
| Maximum Transceivers on Bus | 32 |
| Operating Temperature Range | -40°C to +85°C |
They operate from a 3.3 V supply.
Up to 32 transceivers can be connected on the bus.
The ADM3485 supports a data rate of up to 10 Mbps.
The shutdown mode draws only 2 nA of supply current.