Zero-drift current sense for precision shunt monitoring
The INA186A5IDDFR: Its zero-drift topology holds input offset voltage to 3 µV, which keeps the measurement accurate across temperature and over time without calibration. The rail-to-rail output stage allows the signal to swing close to the supply rails, maximizing dynamic range when the sense voltage is small. Supply current is 48 µA, making this part suitable for always-on monitoring in battery-operated equipment. Gain-bandwidth product of 45 kHz is enough for DC/DC converter loops, motor current feedback, or overcurrent detection in industrial and automotive systems.
Housed in a TSOT-23-8 package (also listed as SOT-23-8), this is a surface-mount part with a 1.6 mm × 2.9 mm body — compact enough for dense PCB layouts. The small footprint means the bypass capacitor should sit within 2 mm of the supply pin to keep the 48 µA supply clean. No exposed thermal pad, so heat dissipation relies on the copper pour and via stitch under the part.