Package and board integration
The INA190A1IRSWR comes in a 10-UFQFN package (1.8x1.4 mm body, 0.40 mm pitch), demanding a fine-pitch layout with thermal vias under the exposed pad for adequate heat sinking. The small footprint suits space-constrained current-sense nodes on multi-layer boards.
Precision and power budget
With a 2 µV typical input offset voltage and 500 pA input bias current, the INA190A1IRSWR resolves sub-millivolt drops across a shunt resistor without significant error from bias currents — critical for low-side sensing where the shunt voltage is tens of millivolts. Drawing only 40 µA supply current, this amplifier fits battery-powered or energy-harvesting designs where every microamp counts. The rail-to-rail output swings close to the supply rails, preserving dynamic range at low supply voltages down to 1.7 V.
Bandwidth and response time
The 45 kHz gain-bandwidth product and 0.25 V/µs slew rate limit the INA190A1IRSWR to DC and low-frequency current monitoring — suitable for motor winding currents, battery charge/discharge profiles, or DC rail sensing, but not for fast-switching power converter loops above a few kilohertz.