INA212CIRSWR

Overview

The INA212CIRSWR is a bi-directional, high-precision current sense amplifier from Texas Instruments' Zero-Drift series. It features a single-ended output and operates within a supply voltage range of 2.7 V to 26 V. The device offers a gain bandwidth product of 4 kHz and a slew rate of 0.4 V/µs. Key electrical specifications include an input bias current of 28 µA, input offset voltage of 550 nV, and a common-mode rejection ratio (CMRR) of 140 dB. It functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Bi-directional current sensing capability for accurate measurement in both directions
• High precision performance with low input offset voltage and high CMRR
• Zero-drift architecture ensures stability over temperature variations
• Wide common-mode voltage range supporting diverse system architectures

Applications

• Automotive battery monitoring systems
• Industrial motor control circuits
• Power management unit current tracking
• Battery charger current limiting applications

Procurement Notes

Verify the specific suffix 'RSWR' indicates the UQFN package variant when sourcing. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the ordering part number matches the required pin configuration and marking scheme. Check for any recent Product Change Notifications regarding assembly sites or material changes before finalizing procurement plans.

Selection Notes

Select this component for applications requiring precise bidirectional current measurement in automotive or industrial environments. The wide common-mode voltage range allows flexibility in high-side or low-side sensing configurations. Consider the UQFN package size for space-constrained PCB layouts. Verify that the 4 kHz bandwidth meets the dynamic response requirements of the target application.

Part Context

This device belongs to the INA212 family of current sense amplifiers designed for high-accuracy measurements. It complements other variants like the INA212BIDCKR by offering specific package options and optimized performance characteristics for demanding applications. The Zero-Drift technology distinguishes it from standard operational amplifiers by minimizing offset drift over time and temperature.

Replacement Considerations

Direct substitutes may include other INA212 family members such as INA212CIRSWT if tape-and-reel packaging is preferred over cut tape. Verify pin compatibility and electrical parameters against the original datasheet before substitution.

FAQ

What is the maximum common-mode voltage supported by the INA212CIRSWR?

The device supports a common-mode voltage range up to 12 V.

Does the INA212CIRSWR support bidirectional current sensing?

Yes, it is specifically designed for bi-directional current sensing applications.