INA253A3IPWR

Overview

The INA253A3IPWR is a high-voltage, bidirectional current-shunt monitor featuring an integrated precision shunt resistor. It operates with a common-mode voltage range from –4 V to +80 V, independent of the supply voltage. The device provides a voltage output proportional to the current flowing through the internal 2 mΩ shunt resistor. Key electrical characteristics include a maximum shunt resistor tolerance of 0.1%, shunt inductance of 3 nH, and a gain bandwidth product of 350 kHz. It functions within a supply voltage range of 2.7 V to 5.5 V and supports operating temperatures from -40°C to +125°C.

Feature Summary

• Integrated precision shunt resistor eliminates external component requirements for basic sensing
• Bidirectional current monitoring capability across a wide common-mode voltage range
• High common-mode rejection ratio ensures accurate measurement in noisy environments
• Zero-drift architecture maintains precision over temperature variations

Applications

• Motor control systems requiring precise current feedback
• Power supply monitoring and protection circuits
• Industrial automation equipment current sensing
• Battery management system charge/discharge monitoring

Procurement Notes

Verify the specific suffix IPWR indicates the TSSOP-20 package configuration when sourcing. Confirm that the A3 variant corresponds to the specified gain and tolerance parameters in the official datasheet. Ensure compatibility with your PCB footprint for the 20-pin Thin Shrink Small Outline Package. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when an integrated solution combining the sense amplifier and shunt resistor is required to save board space. The 2 mΩ internal resistance determines the voltage drop and power dissipation; ensure it aligns with efficiency targets. Consider the 80 V common-mode range suitability for high-side sensing applications. Verify that the bidirectional output meets the signal conditioning needs of the downstream ADC or controller.

Part Context

This part belongs to the Texas Instruments INA253 family of current-shunt monitors. The family includes variants with different gains and package options, such as the INA253-Q1 for automotive qualification. The INA253 series is designed to simplify high-voltage current sensing by integrating the shunt element directly into the IC, reducing parasitic inductance and improving accuracy compared to discrete solutions.

Replacement Considerations

Direct substitutes may include other parts from the INA253 family with compatible pinouts and electrical characteristics. Verify that any replacement maintains the 2 mΩ integrated shunt value and TSSOP-20 package dimensions. Cross-reference specifications for common-mode voltage range and supply voltage compatibility before substitution.