8.1 Overview

The ISO1500 device is an isolated RS-485/RS-422 transceiver designed to operate in harsh industrial environments. This device supports data transmissions up to 1 Mbps. The ISO1500 device has a 3-channel digital isolator and an RS-485 transceiver in an ultra-small SSOP package. The silicon-dioxide based capacitive isolation barrier supports an isolation withstand voltage of 3 kV_RMS and an isolation working voltage of 566 V_PK. Isolation breaks the ground loop between the communicating nodes and lets data transfer in the presence of large ground potential differences. The wide logic supply of the device (V_CC1) supports interfacing with 1.8-V, 2.5-V, 3.3-V. and 5-V control logic. Functional Block Diagram shows the functional block diagram of the the half-duplex device.