INA138NA/250

Current Regulation/Management Overview

The INA138NA/250 is a high-side, single-channel current shunt monitor manufactured by Texas Instruments. It operates with an input voltage range of 2.7 V to 36 V and maintains an accuracy of ±0.5%. The device features a low quiescent current of 60 µA and functions within a temperature range of -40°C to +125°C. It utilizes a compact SOT-23-5 surface-mount package.

Current Regulation/Management Feature Summary

• High-side current sensing capability allowing measurement on the positive supply rail
• Current output architecture enabling flexible gain configuration via external load resistors
• Independent input common-mode and power supply voltage ranges for versatile integration

Current Regulation/Management Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops for sensor signal conditioning
• Power supply regulation circuits for feedback monitoring

Current Regulation/Management Procurement Notes

Verify component status as the INA138NA/250G4 variant is marked obsolete. Confirm availability of active equivalents such as INA138NA/250 or INA138NA/3K. Ensure sourcing from authorized distributors to guarantee authenticity and traceability for production environments.

Current Regulation/Management Selection Notes

Select this component for applications requiring high-side current measurement with minimal static power consumption. The wide common-mode voltage range supports various bus voltages. Consider the SOT-23-5 package constraints for thermal management and PCB layout requirements in space-sensitive designs.

Current Regulation/Management Part Context

This device belongs to the INA138 family of current shunt monitors. It shares functional similarities with the INA168 but differs in maximum operating voltage limits. The series is designed for general-purpose current monitoring where size and power efficiency are critical design parameters.

Current Regulation/Management Replacement Considerations

INA138NA/250 is listed as a manufacturer-recommended replacement for the obsolete INA138NA/250G4. Verify pinout compatibility and electrical specifications before substitution.