INA250A3PWR

Overview

The INA250A3PWR is a bidirectional current-shunt monitor from Texas Instruments featuring a precision integrated shunt resistor. It operates with a supply voltage range of 2.7 V to 36 V and supports low-side or high-side measurements. The device provides an output proportional to the current, with a gain of 800 mV/A. Key electrical parameters include a maximum accuracy of 0.3%, a maximum operating temperature of +125 °C, and a minimum operating temperature of -40 °C. It is housed in a TSSOP-16 package.

Feature Summary

• Integrates a precision shunt resistor to simplify printed circuit board design
• Supports bidirectional current measurement for both sourcing and sinking applications
• Enables flexible placement via compatibility with low-side and high-side configurations

Applications

• Industrial process control systems requiring precise current monitoring
• Power distribution units in industrial automation equipment
• Battery management systems within electric vehicles or energy storage
• Overcurrent protection circuits in motor drives

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-16 package and reel packaging configuration required for your assembly line. Confirm that the A3 variant meets the necessary accuracy specifications for your application. Ensure compliance with RoHS directives and check moisture sensitivity levels before soldering. Validate that the component is suitable for the intended thermal environment.

Selection Notes

Select this component when a compact solution integrating both sensing and amplification is required. The integrated resistor eliminates external shunt components, reducing board space. Choose this part if bidirectional monitoring is necessary for system diagnostics. Consider the 0.3% accuracy limit against stricter requirements that might necessitate higher-precision alternatives like the INA240 series.

Part Context

This device belongs to the INA250 family of current monitors designed to replace traditional discrete shunt amplifier designs. The family includes variants with different accuracies and packages. The INA250A3PWR specifically targets applications needing moderate precision with reduced component count. It serves as a direct replacement for complex multi-component current sensing circuits in modern electronic systems.

Replacement Considerations

The INA250A4PWR offers similar functionality but may differ in accuracy or calibration. Verify pinout compatibility before substitution. Other family members like the INA250A3PW exist; ensure the package type matches your PCB footprint. Cross-reference datasheets to confirm electrical parameter alignment.