INA381A2IDSGT

Current Regulation/Management Overview

The INA381A2IDSGT is a current sense amplifier manufactured by Texas Instruments, featuring an integrated over-current comparator. It operates with a supply voltage range of 2.7 V to 5.5 V and supports common-mode voltages up to 26 V. The device offers a fixed gain of 20 V/V and a bandwidth of 350 kHz. Key electrical specifications include a maximum input offset voltage of 150 µV, a minimum common-mode rejection ratio (CMRR) of 84 dB, and a maximum quiescent current of 0.5 mA. It functions within a temperature range of -40°C to 125°C and is housed in an 8-WSON package.

Current Regulation/Management Feature Summary

• Integrates a zero-drift architecture for high precision without external trimming
• Includes an internal comparator for immediate over-current protection alerts
• Supports low-side and high-side sensing configurations

Current Regulation/Management Applications

• Over-current protection circuits in power distribution systems
• Current monitoring in industrial automation equipment
• Battery management system current sensing

Current Regulation/Management Procurement Notes

Verify the specific suffix IDSGT corresponds to the 8-WSON package and tape-and-reel packaging configuration. Confirm that the A1 or A2 grade designation matches the required offset voltage and CMRR tolerances for your design. Ensure compatibility with the 2.7 V to 5.5 V supply rail constraints during integration.

Current Regulation/Management Selection Notes

Select this component when a compact solution is required for bidirectional or unidirectional current sensing with built-in fault detection. The fixed 20 V/V gain simplifies signal conditioning compared to programmable gain alternatives. Consider the 350 kHz bandwidth for applications requiring fast transient response without excessive noise filtering requirements.

Current Regulation/Management Part Context

This device belongs to the INA381 family of current sense amplifiers from Texas Instruments. The family is characterized by its zero-drift technology and integrated comparator functionality, designed to replace discrete solutions in space-constrained PCB layouts. It serves as a cost-effective alternative to higher-bandwidth or higher-voltage variants within the broader current sensing portfolio.

Current Regulation/Management Replacement Considerations

INA381A2IDGSR is a reel-based variant of the same functional device. INA381A2IDGST is the TSSOP-10 package equivalent. Verify pinout compatibility if substituting between WSON and TSSOP packages.