The ADM3485E is a 3.3 V, low power data transceiver with ±15 kV ESD protection, suitable for half-duplex communication on multipoint bus transmission lines. The ADM3485E is designed for balanced data transmission and complies with TIA/EIA standards RS485 and RS-422. The ADM3485E is a half-duplex transceiver that shares differential lines and has separate enable inputs for the driver and the receiver. APPLICATIONS
The devices have a 12 kΩ receiver input impedance, which allows up to 32 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powered-down driver is tristated to avoid overloading the bus.
The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit.
The part is fully specified over the industrial temperature range and is available in an 8-lead narrow SOIC package.
Features and Benefits
| Interface & IsolationBuilding Technology
ADM3485E IBIS Model
Reference Designs |
| Document | note |
| ADM3485E: 15 kV ESD-Protected, 3.3 V,12 Mbps, EIA RS-485/RS-422 Transceiver Data Sheet (Rev. D) | PDF 445 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| ADM3485EAR Contact ADI | 8 ld SOIC | OTH 98 | 1.9 | 1.52 | N | |
| ADM3485EAR-REEL7 Contact ADI | 8 ld SOIC | REEL 1000 | 0 | 1.52 | N | |
| ADM3485EARZ Production | 8 ld SOIC | OTH 98 | -40 to 85C | 1.65 | 1.32 | Y |
| ADM3485EARZ-REEL Production | 8 ld SOIC | REEL 2500 | -40 to 85C | 0 | 1.32 | Y |
| ADM3485EARZ-REEL7 Production | 8 ld SOIC | REEL 1000 | -40 to 85C | 0 | 1.32 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| EVAL-RS485HDEBZ | Standard Half-Duplex RS-485 Evaluation Board | 30 | Y |
