INA381A2IDGST

Current Regulation/Management Overview

The INA381A2IDGST is a unidirectional current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 50 V/V and supports a maximum common-mode voltage of 26 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. It offers a bandwidth of 350 kHz and a minimum common-mode rejection ratio of 84 dB. The input offset voltage is typically 100 µV, and the gain error is limited to 0.1%. The component is housed in a TSSOP-10 package and functions within an operating temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Integrates a zero-drift architecture for high precision without external calibration
• Includes an integrated overcurrent comparator for fast fault detection
• Supports low-side and high-side sensing configurations
• Provides rail-to-rail output capability

Current Regulation/Management Applications

• Industrial motor control systems
• Power supply current monitoring
• Battery management systems
• Overcurrent protection circuits

Current Regulation/Management Procurement Notes

Verify the specific suffix IDGST corresponds to the TSSOP-10 package variant when sourcing. Confirm that the A1 grade designation matches the required accuracy specifications for your design, as other grades exist within the family. Ensure compatibility with your PCB footprint for the specified surface-mount package before finalizing procurement orders.

Current Regulation/Management Selection Notes

Select this model for applications requiring a fixed 50 V/V gain and high-speed response up to 350 kHz. It is suitable for designs needing integrated fault protection via the built-in comparator. Consider alternative gain variants if the signal amplification requirements differ from the fixed 50 V/V specification provided in this part number.

Current Regulation/Management Part Context

This component belongs to the INA381 family of current sense amplifiers from Texas Instruments. The family shares core zero-drift technology and integrated comparator functionality. Variations within the series primarily differ in fixed gain settings and package options, allowing designers to select the optimal configuration for specific voltage and space constraints.

Current Regulation/Management Replacement Considerations

Direct pin-compatible replacements within the same family include the INA381A1IDGST (Gain 2 V/V) and INA381A3IDGST (Gain 100 V/V). Verify that the gain difference does not impact system performance before substituting.