アプリケーションノート 2116

RS-485 Data Interface Gives Isolated, Full-Duplex Operation


要約: A circuit is described that provides fully isolated RS-485 full-duplex data communication with only two integrated circuits (ICs). An internal transformer-coupled isolated supply and internal optocouplers in the data path provide typical isolation to 1600Vrms for 1 minute or 2000Vram for 1 second. Data rates of 250kbaud are achieved with internally slew-rate-limited circuits or to 2.5Mbaud with non-slew-rate limited circuits, depending upon choice of available ICs.