Quad current-sense amplifier in 20-TSSOP
The INA4181A1IPWR: With a -3 dB bandwidth of 350 kHz and a slew rate of 2 V/µs, it tracks fast load transients in power-management loops and motor-drive current-sense paths without aliasing the switching ripple. The 690 µA total supply current across all four channels keeps the thermal footprint low in dense boards — each amplifier draws roughly 172 µA, making it suitable for multi-rail monitoring in space-constrained designs.
Precision floor and input characteristics
Input offset voltage is trimmed to 100 µV max, and input bias current sits at 75 µA — the offset dominates the error budget in low-side shunt measurements where the common-mode voltage is near ground, while the bias current matters when the shunt resistance exceeds a few hundred milliohms.
Package, compliance, and sourcing posture
CT suits prototype or low-volume builds.