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?Classic? High-Precision Low Side Current Sense

2018-05-02 06:30  
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View Full Size Image View Original Datasheet“Classic” High-Precision Low Side Current Sense

This configuration is basically a standard non-inverting amplifier. The op amp used must support common-mode operation at the lower rail and the use of a Zero-Drift type (as shown) provides excellent precision. The output of this circuit is referenced to the lower Kelvin contact, which could be ground in a single-supply application. Small-signal range is limited by VOL for single-supply designs. Scaling accuracy is set by the quality of the user-selected resistors.

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