INA199A1RSWR

Current Regulation/Management Overview

The INA199A1RSWR is a unidirectional current sense amplifier from Texas Instruments featuring zero-drift architecture. It operates within a supply voltage range of 2.7 V to 26 V and supports bidirectional common-mode voltages up to 12 V. The device provides a fixed gain of 50 V/V with an input offset voltage of 5 µV and a maximum gain error of 0.03%. Key electrical specifications include a bandwidth of 80 kHz, a common-mode rejection ratio of 120 dB, and a quiescent current of 100 µA. It is housed in a UQFN-10 package.

Current Regulation/Management Feature Summary

• Zero-drift technology ensures high precision by minimizing offset voltage drift over temperature variations.
• Supports both low-side and high-side current sensing configurations for flexible system integration.
• Bidirectional operation allows detection of current flow in either direction across the shunt resistor.

Current Regulation/Management Applications

• Battery management systems
• Power supply monitoring
• Overcurrent protection circuits

Current Regulation/Management Procurement Notes

Verify the specific suffix 'RSWR' corresponds to the UQFN-10 package variant when sourcing. Confirm that the A1 grade meets the required accuracy specifications for the application. Ensure compatibility with the 2.7 V to 26 V supply range during design validation.

Current Regulation/Management Selection Notes

Select this component for applications requiring high DC accuracy without external calibration. The zero-drift feature makes it suitable for precision measurements where temperature stability is critical. Compare the 50 V/V gain against other variants like the A2 (100 V/V) or A3 (200 V/V) based on the desired output voltage swing relative to the shunt drop.

Current Regulation/Management Part Context

This part belongs to the INA199 family of current sense amplifiers. It shares the core zero-drift operational amplifier architecture with other members such as the INA199A2RSWR and INA199A3RSWR. The primary distinction lies in the fixed internal gain setting, which differentiates it from other gain options within the same series.

Current Regulation/Management Replacement Considerations

INA199A2RSWR offers a higher gain of 100 V/V. INA199A3RSWR provides a gain of 200 V/V. Both share the same package and zero-drift characteristics but require circuit adjustments due to gain differences.