Figure 8-1 shows an OBC that uses the AMC1211-Q1 to monitor the DC bus voltage that can be as high as 600 V. The DC bus voltage is divided down to an approximate 2-V level across the bottom resistor (RSNS) of a high-impedance resistive divider that is sensed by the AMC1211-Q1. The output of the AMC1211-Q1 is a differential analog output voltage of the same value as the input voltage but is galvanically isolated from the high-side by a basic isolation barrier.

The isolation barrier and high common-mode transient immunity (CMTI) of the AMC1211-Q1 ensure reliable and accurate operation in harsh and high-noise environments.