INA212AIDCKT

Overview

The INA212AIDCKT is a single-channel, bidirectional current shunt monitor from Texas Instruments' Zero-Drift series. It operates on a single supply voltage ranging from +2.7V to +26V and consumes a maximum of 65µA of supply current. The device features a fixed gain of 75 V/V, enabling accurate measurement of low-side or high-side currents with a maximum full-scale voltage drop as low as 10mV across the shunt resistor. It provides an output type of single-ended voltage. Key electrical specifications include a gain-bandwidth product of 4 kHz, an input bias current of 28 µA, and an input offset voltage of 0.55 µV. The component supports operation over an extended temperature range from -40°C to +125°C and is housed in a compact SC-70-6 surface-mount package.

Feature Summary

• Zero-drift architecture ensures low offset voltage for precise sensing of small voltage drops across shunt resistors.
• Bidirectional capability allows detection of both positive and negative current flow relative to ground.
• High common-mode rejection ratio maintains accuracy despite variations in common-mode voltage levels.

Applications

• Battery management systems requiring precise current monitoring
• Overcurrent protection circuits in portable devices
• Load switch control applications

Procurement Notes

Verify the specific suffix 'CKT' corresponds to the tape-and-reel packaging configuration when ordering. Confirm that the 'A' grade designation meets the required offset voltage and gain error tolerances for the target application. Ensure the SC-70-6 footprint matches the PCB layout design. Cross-reference the datasheet revision history for any recent changes to mechanical dimensions or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when high precision is required for low-voltage drop measurements without external calibration. The zero-drift technology eliminates the need for chopper stabilization artifacts often found in other amplifier types. Consider the 75 V/V fixed gain if the expected shunt voltage range aligns with the desired output swing. Evaluate the 4 kHz bandwidth against the system's noise requirements and signal frequency content to ensure adequate response time.

Part Context

This part belongs to the INA21x family of current shunt monitors, which are designed for high-accuracy current sensing in space-constrained environments. The family shares common features such as wide common-mode voltage ranges and low power consumption. The INA212 specifically offers a moderate gain setting suitable for general-purpose applications where extreme sensitivity is not required but stability and low drift are critical.

Replacement Considerations

The INA210BIDCKR serves as a functional alternative within the same family, offering similar bidirectional sensing capabilities. However, it differs in gain settings and specific electrical parameters such as input offset voltage and bandwidth. Verify compatibility regarding gain accuracy and output drive requirements before substituting.