INA212CIDCKT

Overview

The INA212CIDCKT is a bidirectional, zero-drift current shunt monitor manufactured by Texas Instruments. It operates on a single supply voltage ranging from +2.7V to +26V and features a gain of 50 V/V. The device detects common-mode voltages from -0.3V to 26V, independent of the supply voltage. Key electrical parameters include an input offset voltage of 5µV maximum, an input bias current of 35µA, and a power supply current of 100µA maximum. It offers a gain bandwidth product of 7kHz and a common-mode rejection ratio of 105dB. The component functions within a temperature range of -40°C to +85°C and is housed in a SC-70-6 package.

Feature Summary

• Zero-drift architecture ensures low offset voltage for accurate sensing across small shunt voltage drops.
• Bidirectional capability allows detection of both positive and negative currents relative to ground.
• Wide common-mode voltage range supports high-side and low-side monitoring applications.

Applications

• Battery management systems
• Load switch control circuits
• Overcurrent protection designs

Procurement Notes

Verify the specific suffix 'CKT' indicates the tape-and-reel packaging configuration when ordering. Confirm that the 'C' grade meets the required operating temperature range of -40°C to +85°C for your application environment. Ensure the SC-70-6 footprint matches your PCB layout constraints. Cross-reference the datasheet revision date to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when precise DC current measurement is required without external calibration. The zero-drift technology minimizes errors caused by temperature variations compared to standard chopper-stabilized amplifiers. Consider the 7kHz bandwidth limitation if high-frequency signal response is necessary. Evaluate the 5µV offset specification against the minimum expected shunt voltage drop to ensure adequate resolution.

Part Context

This part belongs to the INA21x family of current shunt monitors, which are designed for low-power, high-precision applications. The family includes variants with different gains and accuracy grades. The INA212 specifically provides a fixed gain of 50 V/V, making it suitable for detecting larger shunt voltages while maintaining high accuracy. It shares the same package and basic functionality as other members like the INA210 and INA213 but differs in gain and offset specifications.

Replacement Considerations

Direct substitutes within the same family include the INA210 (Gain 20) and INA213 (Gain 100). Verify that the replacement part's gain factor aligns with the system's signal conditioning requirements. Check if the alternative part's offset voltage and bandwidth meet the original design's precision and speed criteria.