INA214AIDCKR

Overview

The INA214AIDCKR is a single-channel, bidirectional current-shunt monitor from Texas Instruments' Zero-Drift series. It features a fixed gain of 100 V/V and operates within a supply voltage range of 2.7 V to 26 V. Key electrical parameters include a maximum input offset voltage of 1 µV, an input bias current of 28 µA, and a gain-bandwidth product of 30 kHz. The device supports high-side and low-side measurements with a common-mode voltage up to 12 V and offers a CMRR of 140 dB. It functions reliably across an extended temperature range of -40°C to +125°C and is housed in a compact SC-70-6 surface-mount package.

Feature Summary

• Zero-drift architecture ensures minimal input offset voltage drift over temperature variations
• Bidirectional measurement capability allows detection of both positive and negative current flow
• Supports both high-side and low-side current sensing configurations

Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops for shunt-based current measurement
• Overcurrent protection circuits in power distribution units

Procurement Notes

Verify the specific suffix 'CKR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the A-grade temperature rating aligns with the operational environment specifications. Ensure compatibility with the target PCB footprint for the SC-70-6 package before finalizing procurement orders.

Selection Notes

Select this component when high DC accuracy is critical due to its zero-drift technology. The fixed 100 V/V gain simplifies design by eliminating external resistor networks. Consider the 12 V common-mode limit; higher voltage applications may require different part numbers within the family. The wide supply range supports low-voltage battery-powered designs effectively.

Part Context

This device belongs to the INA21x family of current-shunt monitors, which are designed for precision measurement applications. The INA214 variant specifically provides a fixed gain of 100 V/V, distinguishing it from other members like the INA210 or INA212 which offer different gain options. The family shares the Zero-Drift amplifier topology for enhanced stability.

Replacement Considerations

INA214BIDCKT: Offers identical performance but typically carries a B-grade specification. INA214AQDCKRQ1: Automotive-grade version qualified under AEC-Q100 standards. INA210AIDCKR: Alternative with lower gain (200 V/V) and slightly different bandwidth characteristics.