INA139NA/250G4

Current Regulation/Management Overview

The INA139NA/250G4 is a high-side current shunt monitor manufactured by Texas Instruments. It operates on a single supply voltage ranging from 2.7 V to 40 V, with typical applications at 3 V, 5 V, 9 V, 12 V, 15 V, 18 V, 24 V, and 28 V. The device features a minimum common-mode rejection ratio (CMRR) of 100 dB and provides an output proportional to the input current. It is housed in a compact SOT-23 package with five pins, measuring 2.9 mm in length, 1.6 mm in width, and 1.15 mm in height. The component supports surface-mount installation and functions within a temperature range of -40 °C to +85 °C.

Current Regulation/Management Feature Summary

• Provides high-side current monitoring capability for precise measurement across shunt resistors.
• Delivers a differential output signal that accurately tracks the voltage drop across the sensing element.
• Ensures high accuracy through a minimum common-mode rejection ratio of 100 dB.

Current Regulation/Management Applications

• Current monitoring in power supply systems
• Battery management circuits
• Industrial process control instrumentation

Current Regulation/Management Procurement Notes

Verify the specific suffix G4 indicates RoHS compliance when sourcing. Confirm the package type matches the required SOT-23 footprint for PCB layout. Ensure the operating voltage range aligns with the system's maximum common-mode voltage requirements. Check for availability of tape-and-reel or cut-tape packaging options based on assembly needs.

Current Regulation/Management Selection Notes

Select this component for applications requiring high-side current sensing with a wide common-mode voltage range up to 40 V. Consider the SOT-23-5 package for space-constrained designs. Evaluate the thermal performance within the specified -40 °C to +85 °C operating range. Compare against similar models like INA138 if higher temperature ratings are needed.

Current Regulation/Management Part Context

This part belongs to the INA139 series of current shunt monitors from Texas Instruments. It is functionally related to the INA138 but may differ in specific electrical characteristics or temperature ranges. The G4 suffix typically denotes environmental compliance. It serves as a dedicated solution for monitoring current in high-side configurations without requiring complex external circuitry.

Current Regulation/Management Replacement Considerations

INA139NA/250 is a direct equivalent part number. INA138NA/250 is a related variant; verify temperature range and voltage specifications before substitution.