Current-sense amplifier with 5 µV offset — what that buys you
The INA240A4PWR: Its 5 µV input offset voltage means you can measure a 50 mV full-scale drop across the sense resistor with 0.01 % error contribution from offset alone — no calibration step in production. That makes it a fit for precision motor-phase current loops, solenoid diagnostics, and battery charge/discharge monitoring where the shunt voltage is small and the accuracy target is tight.
Bandwidth and slew rate — transient capture window
The 400 kHz -3 dB bandwidth and 2 V/µs slew rate set the device's ability to reproduce fast current edges. A 1 A/µs current ramp through a 10 mΩ shunt produces a 10 mV/µs signal at the input — the INA240A4PWR's slew rate is 200× faster, so the output tracks the event with negligible lag. This matters for overcurrent detection in switching regulators or short-circuit protection in motor drives where the fault must be captured within a few microseconds.
Supply current is 1.8 mA, low enough to keep the thermal budget clean in a densely populated 8-TSSOP board.
Package and marking — provenance check
Supplied in 8-TSSOP with a 4.40 mm body width — the same footprint as other INA240 gain options. The base product number INA240 is consistent across the family; the suffix A4 identifies the gain variant.