INA199B2RSWR

Current Regulation/Management Overview

The INA199B2RSWR is a zero-drift current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 100 V/V and supports bidirectional current measurement with a common-mode voltage range up to 12 V. The device operates on a single supply voltage between 2.7 V and 26 V, consuming 115 µA of quiescent current. Key electrical specifications include an input offset voltage of 5 µV, a CMRR of 120 dB, and a gain error of 0.03%. It 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 architecture ensures high precision and low offset voltage for accurate measurements.
• Bidirectional operation allows detection of current flow in both directions across the shunt.
• High common-mode rejection ratio maintains accuracy in noisy environments.

Current Regulation/Management Applications

• Battery management systems
• Power supply monitoring
• Industrial process control

Current Regulation/Management Procurement Notes

Verify that the specific suffix 'B2' corresponds to the required gain configuration and accuracy grade before procurement. Confirm that the UQFN-10 package dimensions align with the target PCB footprint. Ensure the supply voltage limits are respected within the system design to prevent damage. Cross-reference the manufacturer's latest datasheet for any updates regarding pinout or thermal characteristics.

Current Regulation/Management Selection Notes

Select this component when high precision is required without external calibration due to its zero-drift technology. The 100 V/V gain is suitable for applications requiring significant signal amplification from small shunt voltages. Consider the 12 V common-mode limit; if higher voltages are present, other variants in the series may be necessary. The bidirectional capability makes it ideal for rechargeable battery circuits.

Current Regulation/Management Part Context

This part belongs to the INA199 family of current sense amplifiers, which are designed for high-accuracy applications. The 'B2' designation typically indicates a specific gain and accuracy bin within the product line. It shares the zero-drift operational principle with other members like the INA199A and INA199C series, differing primarily in gain settings and initial accuracy specifications.

Current Regulation/Management Replacement Considerations

The INA199B2DCKRQ1 is a qualified automotive-grade alternative with similar electrical characteristics but in a SC-70-6 package. Other family members such as INA199A2RSWR or INA199C3RSWR offer different gain values (100 V/V or 200 V/V) and should be evaluated based on specific circuit requirements.