Another higher-cost approach for current-sense diagnostics is to add an independent ADC channel in a separate measurement path. This redundant measurement path helps detect an open-wire condition in the current-sense path or an abnormality in the primary ADC measurement. For example, bidirectional current-sense devices such as INA194 or AMC1350 can be used to implement redundant current measurements. However, this approach increases the overall system cost and introduces additional quiescent current consumption.

In energy storage system (ESS) applications, TI's BQ79731 UMI sensor integrates two independent current-sense ADCs. Open-wire detection can be implemented by using the redundant ADC together with an independent RC input path. This approach simplifies the system design and helps improve power density.