INA214BIDCKR

Overview

The INA214BIDCKR is a single-channel, bidirectional current-sense amplifier 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 specifications include a maximum input offset voltage of 1 µV, an input bias current of 28 µA, and a common-mode rejection ratio of 140 dB. The device supports a common-mode voltage up to 12 V and offers a gain-bandwidth product of 30 kHz with a gain error of 0.02%. It functions in temperatures from -40°C to +125°C and consumes 100 µA of operating supply current.

Feature Summary

• Zero-drift architecture ensures high precision by minimizing input offset voltage drift over temperature and time.
• Bidirectional measurement capability allows for accurate monitoring of both sourcing and sinking currents.
• Supports low-side and high-side measurements with a wide common-mode voltage range.

Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops
• Power supply output current sensing

Procurement Notes

Verify the specific suffix 'CKR' corresponds to the SC-70-6 package and tape-and-reel quantity when ordering. Confirm that the bidirectional operation aligns with system requirements for current direction detection. Ensure the 12 V common-mode limit is sufficient for the target application's shunt placement. Check humidity sensitivity handling requirements during assembly.

Selection Notes

Select this component when ultra-low offset voltage and drift are critical for accuracy in low-voltage applications. The fixed 100 V/V gain simplifies design but limits flexibility compared to programmable gain alternatives. Consider the small SC-70-6 package if board space is constrained. Verify that the 12 V common-mode voltage meets the highest potential difference at the sense inputs.

Part Context

This part belongs to the INA21x family of zero-drift current-shunt monitors. It shares architectural similarities with the INA210 and INA212 but differs in gain and specific performance metrics. The family targets applications demanding high DC accuracy without external trimming.

Replacement Considerations

INA214AIRSWT is a documented alternative within the same series offering similar functionality in a different package configuration.