INA253A2IPW

Overview

The INA253A2IPW is a high-voltage, bidirectional current sense amplifier from Texas Instruments. It features an integrated shunt resistor and zero-drift architecture for precision monitoring. The device operates with a common-mode voltage range of -4 V to 80 V and supports a supply voltage between 2.7 V and 5.5 V. Key electrical parameters include a gain of 100 mA/V, a gain error of 0.05%, and a bandwidth of 350 kHz. It offers a common-mode rejection ratio of 125 dB and input bias current of 90 uA. The component functions within a temperature range of -40°C to +125°C and is housed in a 20-pin TSSOP package.

Feature Summary

• Integrates a precision shunt resistor to simplify PCB layout and reduce component count.
• Provides bidirectional current sensing capability for accurate monitoring in both directions.
• Features zero-drift technology to maintain high accuracy over temperature variations.
• Includes enhanced PWM rejection for reliable operation in noisy switching environments.

Applications

• High-side current monitoring in automotive systems
• Battery management systems requiring precise charge/discharge tracking
• Motor control applications with bidirectional current flow
• Industrial power supplies and inverters

Procurement Notes

Verify the specific suffix 'IPW' corresponds to the TSSOP-20 package and industrial temperature grade (-40°C to +125°C). Confirm AEC-Q100 qualification status if automotive compliance is required. Ensure the gain setting matches the 'A2' designation (100 mA/V) for your circuit design. Check for moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this component when high common-mode voltage up to 80V is required alongside bidirectional sensing. The integrated shunt eliminates external resistor matching issues. Consider the 350 kHz bandwidth for dynamic load applications. Compare against non-integrated solutions for size and accuracy benefits. Verify supply voltage compatibility within the 2.7V to 5.5V range.

Part Context

Part of the INA253 family of high-voltage current sense amplifiers. Designed for applications demanding high precision and robustness in electric vehicle and industrial power electronics. Differentiates from standard op-amp based solutions by integrating the sense element and providing optimized gain and filtering characteristics specifically for shunt-based monitoring.

Replacement Considerations

INA253A1IPW: Same package and features but different gain setting (50 mA/V). INA253A3IPW: Same package and features but different gain setting (25 mA/V). Verify gain requirements before substitution as internal shunt resistance differs.