Precision current sense in a hand-reworkable SOT-23-5
That 900 kHz -3dB bandwidth and 2.5 V/µs slew rate mean it can track current waveforms in switching converters running at a few hundred kilohertz, not just DC rail monitoring.
2 µV offset — what it means for shunt selection
With a 2 µV input offset voltage, the dominant error term in a low-side sense circuit shifts from the amplifier to the shunt resistor's tolerance and TCR. For a 50 A load through a 1 mΩ shunt, the 50 mV sense signal sees a 0.004% offset contribution — negligible. Even at 1 A through 10 mΩ (10 mV sense), the offset adds only 0.02% error. This lets you use a smaller shunt value to reduce power dissipation, or skip a trim pot in production. The 20 µA input bias current flows into the shunt, adding a small voltage drop that matters only with very high shunt resistances — at 100 mΩ it adds 2 µV, doubling the offset, so keep shunt values under 50 mΩ for precision work.
900 kHz bandwidth — switching-frequency fit
The 900 kHz -3dB bandwidth and 2.5 V/µs slew rate give this part enough closed-loop response to reproduce current waveforms in buck converters switching at 200-400 kHz with reasonable fidelity. For a 500 kHz switching regulator, expect some amplitude roll-off and phase lag — the output will still show the average and ripple envelope, but the edges will be slewed. The 1.5 mA quiescent supply current is a reasonable trade-off for this bandwidth; if your application only needs DC current monitoring, a lower-bandwidth sense amp would draw less supply current.
The 2.7 V minimum supply means it works in 3.3 V systems with headroom to spare; the 20 V maximum covers 12 V and 24 V industrial buses directly. No separate LDO needed for the sense amp rail if the bus is within that range. ROHS3 compliant per the listing, so it passes EU material restrictions as-is.