INA214BIRSWT

Overview

The INA214BIRSWT is a single-channel, bidirectional zero-drift current shunt monitor manufactured by Texas Instruments. It operates on a single supply voltage ranging from 2.7 V to 26 V and features a fixed gain of 100 V/V. The device supports high-side and low-side measurements with a common-mode voltage range extending from -300 mV to 26 V. Key electrical specifications include a maximum input offset voltage of 60 µV, a common-mode rejection ratio of 105 dB, and a gain error of 0.02%. It consumes a maximum operating supply current of 115 µA and functions within an industrial temperature range of -40°C to +125°C.

Feature Summary

• Zero-drift architecture ensures low offset voltage for accurate sensing of small shunt voltages
• Bidirectional capability allows measurement of both positive and negative currents
• Supports high-side and low-side current monitoring configurations
• Wide common-mode voltage range enables operation independent of system supply voltage

Applications

• Battery management systems in portable devices
• Overcurrent protection circuits
• Load switch control applications
• Industrial process control monitoring

Procurement Notes

Verify the specific suffix IRSWT confirms the UQFN-10 package and tape-and-reel delivery format. Confirm the 'B' grade designation aligns with the required 60 µV max offset voltage specification. Ensure the component meets AEC-Q100 requirements if automotive qualification is necessary for the target application environment.

Selection Notes

Select this component when precise DC accuracy is critical due to its zero-drift technology. The wide common-mode range makes it suitable for high-voltage systems where the shunt is not referenced to ground. Consider the 100 V/V fixed gain for applications requiring direct interface with standard ADCs without additional amplification stages.

Part Context

This part belongs to the INA21x series of voltage-output current shunt monitors. The series is characterized by its ability to measure currents in both directions while maintaining high accuracy across a wide temperature range. It serves as a robust solution for modern power management designs requiring minimal external components.

Replacement Considerations

INA214AIRSWT: Offers improved offset voltage performance (1 µV) compared to the B-grade version.

FAQ

What is the common-mode voltage range?

The INA214BIRSWT supports a common-mode voltage range from -300 mV to 26 V.

Is the output unipolar or bipolar?

The output is bipolar, allowing the device to indicate both positive and negative current flow relative to the reference.