INA253A1QPWRQ1

Overview

The INA253A1QPWRQ1 is a high-side current sense amplifier designed for automotive applications, certified to AEC-Q100 standards. It features a bidirectional output and operates with a common-mode voltage range of -4 V to 80 V. The device provides a gain of 100 mA/V with a 350 kHz bandwidth. Key electrical parameters include a maximum supply voltage of 5.5 V, minimum of 2.7 V, and typical operating current of 3 mA. It offers a CMRR of 125 dB and gain error of 0.05%. Input bias current is 90 uA, and input voltage noise density is 40 nV/sqrt Hz. Operating temperature ranges from -40°C to +125°C in a TSSOP-20 package.

Feature Summary

• Bidirectional precision current sensing capability for accurate measurement in both directions.
• High common-mode voltage tolerance supporting systems up to 80 V.
• Automotive-grade reliability compliant with AEC-Q100 qualification requirements.

Applications

• Motor control systems requiring precise current feedback
• Battery management systems in electric vehicles
• High-side current monitoring in automotive power distribution

Procurement Notes

Verify the specific suffix 'A1' indicates the fixed gain configuration of 100 mA/V as documented in the official datasheet. Confirm the 'Q1' suffix denotes AEC-Q100 automotive qualification status. Ensure the 'PWR' suffix corresponds to the TSSOP-20 package type required for your PCB layout. Cross-reference the manufacturer part number against the latest Texas Instruments documentation to confirm active status and any potential design changes or obsolescence notices before finalizing procurement.

Selection Notes

Select this component when bidirectional current sensing is required within an 80 V common-mode environment. The fixed 100 mA/V gain simplifies external resistor selection compared to programmable alternatives. Consider the 350 kHz bandwidth for applications requiring moderate speed response. The TSSOP-20 package offers a balance between thermal performance and board space constraints suitable for dense automotive electronics designs.

Part Context

This device belongs to the INA253-Q1 family of high-side current sense amplifiers. It is engineered specifically for automotive environments where robustness against high common-mode voltages and electromagnetic interference is critical. The family supports various gain options, with the A1 variant providing a standardized gain for simplified system design in motor drives and power management circuits.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin compatible alternatives within the INA253 series. Verify that any substitute maintains the same AEC-Q100 grade and bidirectional functionality. Check if different gain variants (e.g., A2, A3) meet the specific signal conditioning requirements of the target application without requiring circuit redesign.