INA199B3RSWT

Current Regulation/Management Overview

The INA199B3RSWT is a single-channel, bi-directional current shunt monitor manufactured by Texas Instruments. It features zero-drift architecture for high precision and operates with a supply voltage range of 2.7 V to 26 V. The device supports both low-side and high-side sensing with a common-mode voltage up to 12 V. It provides a fixed gain of 200 V/V and delivers a voltage output. Key electrical specifications include an input offset voltage of 5 µV, a gain error of 0.03%, and a quiescent current of 115 µA. The component is housed in a 10-UQFN package and functions within a temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Zero-drift technology ensures minimal offset voltage drift over temperature and time
• Bi-directional capability allows accurate measurement of current flow in both directions
• Supports low-side and high-side current sensing configurations
• Voltage output interface simplifies connection to analog-to-digital converters

Current Regulation/Management Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops with high accuracy demands
• Power supply current limiting and protection circuits
• Automotive electronics applications compatible with wide operating temperatures

Current Regulation/Management Procurement Notes

Verify the specific suffix 'WT' against official Texas Instruments documentation to confirm tape-and-reel packaging details and marking codes. Ensure compatibility with standard surface-mount assembly processes for the UQFN-10 package. Cross-reference the part number with authorized distributors to confirm availability and authenticity. Check for any recent product change notices regarding manufacturing sites or materials.

Current Regulation/Management Selection Notes

Select this component when high DC accuracy is critical due to its zero-drift architecture. The 200 V/V gain is suitable for detecting small voltage drops across shunt resistors. Consider the 12 V common-mode limit when designing high-side circuits; higher voltage requirements may necessitate alternative models like the INA190 series. Evaluate the 115 µA quiescent current against system power budget constraints.

Current Regulation/Management Part Context

The INA199B3RSWT belongs to the INA199 family of current sense amplifiers from Texas Instruments. This series is designed for applications requiring high precision and stability without external calibration. The device integrates chopper stabilization to minimize offset voltage, distinguishing it from standard amplifier-based solutions. It serves as a compact solution for modern electronic systems needing reliable current feedback.

Current Regulation/Management Replacement Considerations

INA199B3RSWR: Same functional specifications but in reel packaging instead of cut tape.

Current Regulation/Management FAQ

What is the maximum common-mode voltage supported?

The INA199B3RSWT supports a common-mode voltage up to 12 V.

Does the device support bidirectional current measurement?

Yes, the INA199B3RSWT is designed for bi-directional current sensing.