This design note presents the reference designs of isolated RS-485 nodes using isolated RS-485 transceivers and a transformer driver, SN6505B. Table 1-1 lists featured isolated RS-485 transceivers from Texas Instruments.
Device | Transmission | Data Rate [Mbps] | Maximum Transient Isolation Voltage [Vrms] | Primary-Supply Voltage Range [V] | Secondary-Supply Voltage Range [V] | Package Size [mm] |
---|---|---|---|---|---|---|
ISO1500 | Half-duplex | 1 | 3000 | 1.71 to 5.5 | 4.5 to 5.5 | 4.90 x 3.90 |
ISO1410 | 0.5 | 5000 | 1.71 to 5.5 | 3.0 to 5.5 | 10.30 x 7.50 | |
ISO1430 | 12 | 5000 | 1.71 to 5.5 | 3.0 to 5.5 | 10.30 x 7.50 | |
ISO1450 | 50 | 5000 | 1.71 to 5.5 | 3.0 to 5.5 | 10.30 x 7.50 | |
ISO1412 | Full-duplex | 0.5 | 5000 | 1.71 to 5.5 | 3.0 to 5.5 | 10.30 x 7.50 |
ISO1432 | 12 | 5000 | 1.71 to 5.5 | 3.0 to 5.5 | 10.30 x 7.50 | |
ISO1452 | 50 | 5000 | 1.71 to 5.5 | 3.0 to 5.5 | 10.30 x 7.50 |