Zero-drift current sense for tight loops
It measures current across a shunt resistor on either the high side or low side of the supply rail, outputting a rail-to-rail voltage proportional to the sensed current. The Zero-Drift architecture keeps input offset voltage at 3 µV and input bias current at 500 pA, so the reading stays accurate even when the shunt drop is only a few millivolts. Supply current is 48 µA, which makes it a fit for battery-powered controllers and field transmitters where every microamp is budgeted.
Housed in a TSOT-23-8 (SOT-23-8) surface-mount package.
The INA186A3IDDFT is an active, current-production part from Texas Instruments, ROHS3 compliant. For dual-sourcing or a higher-bandwidth option, the INA254A1IPWAR (350 kHz, 2.4 V/µs) is a pin-compatible alternative within the same Zero-Drift family, though it draws more supply current.