Active Zero-Drift Current Sense in SOT-23-8
The INA190A3IDDFR: Housed in a SOT-23-8 surface-mount package (also designated TSOT-23-8), it fits compact PCB layouts where board space is at a premium. The 1.7 V to 5.5 V supply span allows operation from a single lithium cell or a regulated 3.3 V/5 V rail, drawing only 48 µA quiescent current — a fit for always-on sensing nodes.
Parametric Profile for Precision Sensing
With a gain-bandwidth product of 35 kHz and a slew rate of 0.3 V/µs, this amplifier is optimized for DC and low-frequency current measurements rather than high-speed transient capture. The 3 µV typical input offset voltage and 500 pA input bias current support accurate shunt-voltage sensing down to microvolt levels without significant zero-error drift. The rail-to-rail output stage maximizes the dynamic range when interfacing with ADCs or comparators that share the same supply rail. Single-circuit topology means one amplifier per package — design in one per shunt channel.
Sourcing and Compliance Reality
Texas Instruments lists the INA190A3IDDFR as active with ROHS3 compliance. Sourced through franchised and independent distribution; availability and current pricing are confirmed at RFQ against your BOM quantity.