INA211BIDCKR

Overview

The INA211BIDCKR is a zero-drift current-shunt monitor manufactured by Texas Instruments, housed in an SC-70-6 surface-mount package. It features a fixed gain of 50 V/V and supports bidirectional current sensing with a common-mode voltage range up to 12 V. The device operates on a single supply voltage ranging from 2.7 V to 26 V, drawing a typical supply current of 100 µA. Key electrical specifications include a maximum input offset voltage of 1 µV, a gain error of 0.02%, and a common-mode rejection ratio of 140 dB. It functions within a temperature range of -40°C to +125°C.

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 positive and negative current flows.
• Integrated fixed gain eliminates the need for external resistors, simplifying circuit design and reducing component count.

Applications

• Battery management systems requiring precise low-side or high-side current monitoring
• Portable equipment and battery-powered devices where low quiescent current is critical
• Industrial process controls utilizing shunt-based current sensing

Procurement Notes

Verify the specific suffix 'CKR' corresponds to the SC-70-6 tape-and-reel packaging configuration as defined in the official datasheet. Confirm that the 'B' grade designation meets the required offset voltage and gain accuracy specifications for the application. Ensure compatibility with the target PCB footprint for the six-lead SC-70 package.

Selection Notes

Select this component when high DC accuracy is required without external calibration. The fixed 50 V/V gain suits applications with small shunt voltages. Compare against other INA21x variants if different gain factors or package sizes are needed. Verify that the 12 V common-mode limit aligns with the system's bus voltage requirements.

Part Context

This part belongs to the INA21x family of zero-drift current-shunt monitors from Texas Instruments. The series offers various fixed gains and package options to accommodate different design constraints. The INA211 variant specifically provides a 50 V/V gain, distinguishing it from other members with higher or lower amplification factors within the same low-power, high-precision portfolio.

Replacement Considerations

Official substitutes within the same family include INA210BIDCKR (100 V/V gain), INA212BIDCKR (200 V/V gain), INA213BIDCKR (500 V/V gain), INA214BIDCKR (1000 V/V gain), and INA215BIDCKR (75 V/V gain). All share identical pinouts and packages but differ in internal gain settings.