INA253A2IPWR

Overview

The INA253A2IPWR is a high-voltage, bidirectional, zero-drift current-shunt monitor manufactured by Texas Instruments. It features an integrated precision shunt resistor and operates with a supply voltage range of 2.7 V to 5.5 V. The device supports a common-mode voltage from -4 V to 80 V and provides a gain of 100 mA/V. Key electrical specifications include a 350 kHz bandwidth, 125 dB common-mode rejection ratio, and 40 nV/√Hz input voltage noise density. It 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 for simplified design
• Provides bidirectional current sensing capability
• Features zero-drift architecture for high accuracy
• Includes PWM rejection for noisy environments

Applications

• High-side current monitoring in industrial systems
• Motor control applications requiring precise feedback
• Power supply management circuits
• Battery management systems

Procurement Notes

Verify the specific suffix IPWR indicates the TSSOP-20 package and reel packaging configuration. Confirm that the A2 variant corresponds to the specified 100 mA/V gain. Ensure compatibility with the required operating temperature range of -40°C to +125°C. Check for moisture sensitivity labeling if storage conditions are critical. Validate that the component meets RoHS compliance requirements for your region.

Selection Notes

Select this component when high-side current sensing is required with an integrated shunt to save board space. The zero-drift technology ensures stability over temperature variations without external calibration. The wide common-mode voltage range allows flexibility in system grounding. Consider the 20-pin TSSOP package for surface-mount assembly constraints. Evaluate the 350 kHz bandwidth against the switching frequency of the target application.

Part Context

This part belongs to the INA253 family of current-shunt monitors designed for high-voltage applications. The family includes automotive-grade variants like the INA253A1QPWRQ1. The INA253 series integrates the sense resistor to improve accuracy and reduce component count compared to discrete solutions. It is positioned as a precision solution for industrial and automotive power management.

Replacement Considerations

Check for direct pin-compatible alternatives within the INA253 family, such as the INA253A1 or INA253A3 variants, which may differ in gain or tolerance. Verify that any substitute maintains the same TSSOP-20 package and thermal characteristics. Ensure the replacement supports the required 80 V common-mode voltage range.