INA212CIRSWT

Overview

The INA212CIRSWT is a bidirectional, zero-drift current shunt monitor manufactured by Texas Instruments. It features a fixed gain of 50 V/V and operates on a single supply voltage ranging from 2.7 V to 26 V. The device supports common-mode voltages from -0.3 V to 26 V, independent of the supply voltage. Key electrical parameters include a maximum input offset voltage of 5 µV, a maximum supply current of 115 µA, and a gain error of 0.5%. It functions within an operating temperature range of -40°C to +85°C and is housed in a 10-pin UQFN package.

Feature Summary

• Zero-drift architecture ensures low input offset voltage for high-precision measurements across wide temperature ranges.
• Bidirectional sensing capability allows detection of current flow in both directions relative to ground.
• Wide common-mode voltage range enables operation with high-side or low-side shunts regardless of supply voltage.

Applications

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

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (-40°C to +85°C) rather than the industrial grade. Confirm the 'SWT' suffix corresponds to the UQFN-10 package type as specified in the official datasheet. Ensure compatibility with existing PCB footprints for this specific package variant before ordering.

Selection Notes

Select this component when high accuracy is required without external calibration due to its zero-drift characteristics. The fixed 50 V/V gain suits applications where the shunt voltage is small but requires significant amplification. Consider the 115 µA supply current for battery-powered designs, noting it is slightly higher than lower-gain variants in the series.

Part Context

This part belongs to the INA21x family of current shunt monitors, which offers various fixed gains and temperature grades. The INA212 specifically provides a 50 V/V gain, distinguishing it from other members like the INA210 (200 V/V) or INA211 (100 V/V). It shares the same zero-drift topology and package options within the series.

Replacement Considerations

INA212CIRSR: Identical electrical specifications and functionality but utilizes a different SC70-6 package instead of UQFN-10. Verify pinout compatibility and thermal performance if substituting directly into the same footprint.

FAQ

What is the maximum common-mode voltage supported?

The device supports a common-mode voltage range from -0.3 V to 26 V, independent of the supply voltage.

Does the device support bidirectional current measurement?

Yes, the INA212CIRSWT is designed to measure current flowing in both directions relative to ground.