INA138NA/3KG4

Current Regulation/Management Overview

The INA138NA/3KG4 is a high-side current shunt monitor manufactured by Texas Instruments. It operates within an input common-mode voltage range of 2.7V to 36V and features a supply voltage range of 2.7V to 36V. The device provides an accuracy of ±0.5% and draws a typical quiescent current of 60µA. It is housed in a SOT-23-5 (SC-74A) surface-mount package and supports an operating temperature range from -40°C to +125°C.

Current Regulation/Management Feature Summary

• High-side measurement capability allowing connection to the positive side of the load
• Independent input common-mode and supply voltage ranges for flexible power configurations
• Current output architecture enabling gain setting via external load resistor

Current Regulation/Management Applications

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

Current Regulation/Management Procurement Notes

Verify component authenticity through authorized channels as this part may be obsolete or subject to lifecycle changes. Confirm RoHS compliance status and moisture sensitivity level requirements before procurement. Ensure packaging specifications match production line needs, noting that standard factory packaging quantities may vary. Cross-reference datasheet revisions to confirm pinout and electrical characteristics remain consistent with design specifications.

Current Regulation/Management Selection Notes

Select this component when high-side current sensing is required with minimal static power consumption. The wide common-mode voltage range accommodates various bus voltages up to 36V. The small SOT-23-5 package suits space-constrained designs. Verify that the external load resistor can handle the output current swing for the desired voltage conversion range.

Current Regulation/Management Part Context

This device belongs to the INA138 family of current shunt monitors. It shares functional similarities with other high-side monitors but is distinguished by its specific low quiescent current and high common-mode voltage tolerance. The /3KG4 suffix indicates a specific tape-and-reel packaging variant intended for automated assembly processes.

Current Regulation/Management Replacement Considerations

INA138NA/3K is listed as a manufacturer recommended alternative.