High-side current sense with zero-drift precision
The Texas Instruments INA310B2IDGKR is a zero-drift current sense amplifier designed for high-side shunt measurements across a wide common-mode range. Its 1.3 MHz bandwidth and 2.5 V/µs slew rate support switching-frequency monitoring in motor drives and power converters. The 55 µV input offset voltage, combined with the zero-drift architecture, keeps measurement error low even at small shunt drops, which matters when sizing the sense resistor for minimal power loss.
Supply range and temperature grade
The amplifier operates from 2.7 V to 20 V single supply, covering common 3.3 V, 5 V, and 12 V rails. The -40°C to 125°C ambient temperature range suits industrial and automotive under-hood environments where the part might sit near a motor or solenoid. The 8-VSSOP package (3.00 mm width) fits dense layouts, but the small footprint means the thermal dissipation relies on the PCB copper — keep the sense resistor away from the package if the shunt current is high.
Sourcing and lifecycle
RoHS3 compliant. If you are qualifying this for a new BOM, the active status means no near-term supply disruption.