INA215BIRSWT

Overview

The INA215BIRSWT is a single-channel, bidirectional current shunt monitor from Texas Instruments. It features a zero-drift architecture with an input offset voltage of 1 µV and a gain error of 0.02%. The device operates on a single supply voltage ranging from 2.7 V to 26 V, consuming a maximum quiescent current of 100 µA. It supports a common-mode voltage range of -300 mV to 26 V and offers a fixed gain of 75 V/V. Key electrical specifications include a gain-bandwidth product of 40 kHz, a common-mode rejection ratio of 140 dB, and an input bias current of 28 µA. It functions within a temperature range of -40°C to +125°C.

Feature Summary

• Zero-drift chopper-stabilized architecture ensures low offset voltage and minimal drift over temperature.
• Bidirectional sensing capability allows detection of current flow in both directions across the shunt resistor.
• High common-mode rejection ratio maintains accuracy despite high common-mode voltages.
• Low power consumption enables operation in battery-powered or energy-constrained systems.

Applications

• Industrial process control loop monitoring
• Battery management system current sensing
• Overcurrent protection circuits
• Power supply output current regulation

Procurement Notes

Verify the specific suffix 'B' indicates the specified gain and accuracy grade against the official datasheet. Confirm the 'IRSW' package designation matches the required UQFN-10 footprint for PCB layout. Check for end-of-life status as some variants in this family may be obsolete. Ensure the operating temperature range meets the application's environmental requirements.

Selection Notes

Select this component when high precision is required at low voltage drops across the shunt. The 75 V/V gain is suitable for applications where the shunt voltage is small but needs significant amplification. Compare the 1 µV offset against other models if ultra-low noise is critical. Consider the UQFN-10 package size constraints relative to available board space.

Part Context

This part belongs to the INA21x family of zero-drift current shunt monitors. It shares architectural similarities with the INA210, INA214, and INA215 series, differing primarily in gain settings and specific accuracy grades. The family is designed for high-precision applications requiring stability over wide temperature ranges without external calibration.

Replacement Considerations

INA215BIDCKR: Alternative SC-70-6 package version with identical electrical characteristics. INA214AIRSWT: Different gain (100 V/V) and slightly different offset performance; verify compatibility with existing gain requirements.