INA199B3DCKR

Current Regulation/Management Overview

The INA199B3DCKR is a zero-drift, bidirectional current sense amplifier manufactured by Texas Instruments. It features a high common-mode voltage range from -300 mV to 26 V and operates with a supply voltage up to 26 V. The device provides a gain of 200 V/V with a maximum initial accuracy of 1.5%. Key electrical parameters include a gain-bandwidth product of 14 kHz, a common-mode rejection ratio (CMRR) of 100 dB, and an input bias current of 28 µA. It consumes 115 µA of quiescent current and functions within a temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Zero-drift architecture minimizes offset voltage drift over temperature for high-precision measurements.
• Bidirectional sensing capability allows detection of current flow in both directions across the shunt resistor.
• Wide common-mode voltage range supports operation in high-side configurations up to 26 V.

Current Regulation/Management Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops with high-side current sensing
• Overcurrent protection circuits in power distribution units

Current Regulation/Management Procurement Notes

Verify the specific suffix 'DCKR' corresponds to the SC-70-6 package and tape-and-reel quantity when ordering. Confirm that the B3 grade meets the required 1.5% accuracy specification for the application. Ensure compatibility with the system's common-mode voltage limits before integration.

Current Regulation/Management Selection Notes

Select this component when bidirectional measurement is required alongside high common-mode voltage tolerance. The zero-drift technology is suitable for applications demanding low offset stability without external calibration. Compare against non-zero-drift alternatives if lower cost is prioritized over long-term thermal stability.

Current Regulation/Management Part Context

This part belongs to the INA199 family of current sense amplifiers. The family includes variants with different accuracies and packages. The INA199 series is designed for general-purpose current sensing where precision and wide dynamic range are necessary.

Current Regulation/Management Replacement Considerations

Check datasheets for alternative grades such as INA199A3 or INA199C3. Verify pinout compatibility and package dimensions for direct replacement. Ensure substitute parts meet the same bidirectional and zero-drift requirements.