INA214AIRSWR

Overview

The INA214AIRSWR is a bidirectional, zero-drift series current-shunt monitor manufactured by Texas Instruments. It features a fixed gain of 100 V/V and operates within a supply voltage range of 2.7 V to 26 V. The device supports a common-mode voltage up to 12 V and offers a gain bandwidth product of 30 kHz. Key electrical specifications include an input offset voltage of 1 µV, an input bias current of 28 µA, and a common-mode rejection ratio of 140 dB. It functions in temperatures from -40°C to +125°C and consumes 100 µA of operating current.

Feature Summary

• Bidirectional measurement capability for both high-side and low-side current sensing applications
• Zero-drift architecture ensuring high precision with minimal offset voltage drift over temperature
• Integrated fixed gain of 100 V/V simplifying circuit design without external resistor networks

Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops with shunt-based current feedback
• Overcurrent protection circuits in power distribution units

Procurement Notes

Verify the specific suffix 'R' indicates reel packaging when ordering. Confirm the 'AI' designation matches the required industrial temperature grade and performance class. Ensure the package type aligns with PCB layout requirements. Cross-reference the datasheet revision date to confirm parameter validity. Validate RoHS compliance status through official manufacturer documentation before finalizing procurement.

Selection Notes

Select this component when bidirectional current sensing with high accuracy is required. The fixed 100 V/V gain suits applications needing amplified shunt voltages directly compatible with ADCs. Consider the 12 V common-mode limit for system voltage compatibility. Evaluate the 100 µA supply current against total power budget constraints. Compare input offset voltage specifications against other zero-drift amplifiers for precision needs.

Part Context

This part belongs to the INA21x family of voltage-output current-shunt monitors. It shares architectural similarities with the INA210 and INA214 variants but differs in fixed gain settings. The family emphasizes zero-drift technology for high-precision measurements. It complements instrumentation amplifiers like the INA2141 by offering dedicated shunt monitoring functionality.

Replacement Considerations

The INA214AIRSWT is a tape-and-reel alternative within the same series. Verify if the W suffix denotes a different packaging format while maintaining identical electrical characteristics. Check for pin-compatible substitutes within the INA21x family if supply chain constraints exist.