INA381A1IDSGR

Current Regulation/Management Overview

The INA381A1IDSGR is a low-side capable current sense amplifier from Texas Instruments, housed in a VSSOP-10 package. It features a fixed gain of 2 V/V and supports a maximum common-mode voltage of 12 V. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical quiescent current of 350 µA. Key electrical specifications include a bandwidth of 350 kHz, a minimum common-mode rejection ratio (CMRR) of 100 dB, and a maximum input offset voltage of 100 µV. It functions within an operating temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Integrates an over-current comparator for immediate fault detection without external components
• Provides high accuracy through low input offset voltage and high common-mode rejection ratio
• Supports low-side current sensing applications with a wide common-mode voltage range

Current Regulation/Management Applications

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

Current Regulation/Management Procurement Notes

Verify the specific suffix IDSGR corresponds to the VSSOP-10 package and tape-and-reel packaging configuration. Confirm that the A1 variant matches the required 2 V/V gain specification for your circuit design. Ensure compatibility with the 12 V common-mode voltage limit in your application environment.

Current Regulation/Management Selection Notes

Select this component when a fixed 2 V/V gain is sufficient for the signal conditioning requirements. Consider the 350 kHz bandwidth for dynamic load monitoring applications. Evaluate the 350 µA quiescent current against system power constraints. Verify that the low-side sensing topology aligns with the system ground reference strategy.

Current Regulation/Management Part Context

This part belongs to the INA381 family of current sense amplifiers designed for precision monitoring. The family offers various gain options and package types to suit different board space and performance needs. The INA381 series integrates comparators to simplify over-current protection implementations in compact designs.

Current Regulation/Management Replacement Considerations

Check datasheets for other INA381 variants with different gain settings or packages if the 2 V/V gain or VSSOP-10 form factor does not fit the layout.