INA199B3DCKT

Current Regulation/Management Overview

The INA199B3DCKT is a bidirectional, zero-drift current shunt monitor manufactured by Texas Instruments. It features a fixed gain of 20 V/V and operates with a supply voltage range of 2.7 V to 26 V. The device supports both high-side and low-side measurements with a common-mode voltage range extending from -0.1 V to +26 V. Key electrical specifications include a maximum input offset voltage of 5 µV, a gain error of 0.03%, and a CMRR of 120 dB. It draws a typical supply current of 115 µA and functions within an operating temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Zero-Drift Architecture: Utilizes chopper stabilization to minimize input offset voltage and drift over temperature, ensuring high DC accuracy without external trimming.
• Bidirectional Measurement: Capable of detecting positive and negative currents, allowing for comprehensive monitoring in systems requiring current flow reversal.
• Wide Common-Mode Range: Supports operation across the full supply voltage range, enabling flexible placement in either high-side or low-side circuit configurations.

Current Regulation/Management Applications

• Battery management systems in portable electronics and electric vehicles
• Industrial process control and motor drive current sensing
• Overcurrent protection circuits in power distribution units

Current Regulation/Management Procurement Notes

Verify the specific suffix 'DCKT' corresponds to the SC-70-6 package and tape-and-reel quantity requirements. Confirm that the B3 grade meets the required gain error specifications for the application. Ensure compatibility with the target PCB footprint and reflow soldering profile for the SC-70-6 package. Check for any recent product change notices regarding assembly sites or materials.

Current Regulation/Management Selection Notes

Select this component when high DC accuracy is critical due to its zero-drift technology. The fixed 20 V/V gain is suitable for applications where the shunt voltage drop is small but requires significant amplification. Consider the SC-70-6 package size constraints and the bidirectional capability if current direction monitoring is necessary. Evaluate the 26 V common-mode range against the system's maximum bus voltage.

Current Regulation/Management Part Context

This part belongs to the INA199 family of current shunt monitors, which are designed for precision current sensing in space-constrained applications. The family offers various gain options and accuracy grades (A, B, C) packaged in small form factors like SC-70-6 and UQFN. The INA199 series is characterized by its low power consumption and ability to operate in harsh industrial environments.

Current Regulation/Management Replacement Considerations

Direct substitutes within the same family include INA199B2DCKT and INA199B3DCKR, which share similar electrical characteristics but may differ in packaging format or reel quantity. Cross-brand alternatives such as the NCS199A2RSQT2G exist but require verification of pinout compatibility and gain accuracy differences.