INA199A2RSWR

Current Regulation/Management Overview

The INA199A2RSWR is a single-channel, zero-drift current shunt monitor manufactured by Texas Instruments. It supports bidirectional current sensing with voltage output for both low-side and high-side configurations. The device operates within a supply voltage range of 2.7 V to 26 V and handles common-mode voltages up to 12 V. Key electrical specifications include a fixed gain of 100 V/V, an input offset voltage of 5 µV, and a gain error of 0.03%. It features a bandwidth product of 30 kHz, a quiescent current of 115 µA, and a CMRR of 120 dB. The component is housed in a 10-UQFN package and functions across a temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Zero-drift architecture ensures high precision and stability over temperature variations
• Bidirectional operation enables accurate measurement of current flow in both directions
• Supports both low-side and high-side current sensing applications
• Integrated shutdown capability reduces power consumption during inactive periods

Current Regulation/Management Applications

• Battery management systems
• Overcurrent protection circuits
• Load switch control
• Industrial process control monitoring

Current Regulation/Management Procurement Notes

Verify the specific suffix 'A' indicates the accuracy grade and '2' denotes the gain setting before procurement. Confirm that the RS package corresponds to the UQFN-10 form factor required for the PCB layout. Ensure the operating environment remains within the specified -40°C to +125°C range to maintain performance guarantees. Cross-reference the datasheet for pinout compatibility if replacing existing components.

Current Regulation/Management Selection Notes

Select this component when high accuracy and low drift are critical for current monitoring tasks. The 100 V/V gain is suitable for detecting small voltage drops across shunt resistors. Consider the 12 V common-mode limit; higher voltage applications may require different models. The zero-drift technology minimizes calibration needs compared to standard amplifiers. Evaluate the 115 µA quiescent current against system power budget constraints.

Current Regulation/Management Part Context

This part belongs to the INA199 series of current sense amplifiers from Texas Instruments. The series is characterized by its zero-drift design, which eliminates chopper stabilization artifacts. The INA199A2RSWR specifically offers a 100 V/V gain and 1.5% accuracy. It is designed for applications requiring precise current measurement in space-constrained environments using the compact UQFN package.

Current Regulation/Management Replacement Considerations

The INA199C2RSWR serves as a lower-cost alternative with similar functionality but potentially different accuracy grades. The INA199B2RSWR offers comparable performance with slight variations in initial accuracy. Verify that any substitute maintains the same 100 V/V gain and UQFN-10 package dimensions to ensure board compatibility.