What this current-sense amplifier brings to the BOM
The Texas Instruments INA381A2IDGSR is a Zero-Drift current-sense amplifier in the 10-VSSOP package, specified for high- or low-side shunt monitoring across a 0V to 26V common-mode range.
±1% accuracy — what it buys you
The ±1% accuracy figure is the total output error across the rated input range and temperature. In a 12-bit ADC-based current monitor, that leaves roughly 4 LSBs of headroom before the ADC's own INL and offset degrade the system accuracy below 2%. For overcurrent detection thresholds, the tighter error band means you can set the trip point closer to the nominal load without nuisance tripping from temperature drift.
High/Low-side flexibility and the 26V input range
The INA381A2IDGSR supports both high-side and low-side sensing, so the sense resistor can be placed on the supply rail or the return path depending on system grounding strategy. The 26V input common-mode range covers 24V nominal rails with margin for transients up to the absolute maximum — no external level shifting needed for most industrial buses.