INA241A5QDRQ1

Overview

The INA241A5QDRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It features a fixed gain of 200 V/V and operates with a supply voltage range of 2.7V to 20V. The device supports a wide common-mode input range from -5V to 110V, independent of the supply voltage. Key electrical specifications include a maximum offset voltage of ±8µV, a typical DC CMRR of 166dB, and a small-signal bandwidth of 1.1MHz at all gains. It is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients associated with switching systems.
• Ultra-precision architecture achieves high accuracy through low offset voltage and minimal gain error across the operating temperature range.
• Bidirectional operation allows for accurate measurement of voltage drops across shunt resistors in both positive and negative current directions.

Applications

• Electric power steering (EPS)
• eTurbo/charger systems
• Starter/generator circuits
• Regenerative braking systems

Procurement Notes

Verify the specific package suffix 'D' corresponds to the SOIC-8 footprint required for your PCB layout. Confirm that the 'Q1' designation meets your project's automotive qualification requirements. Ensure the operating temperature range aligns with your system's thermal constraints. Cross-reference the manufacturer part number against official distributor catalogs to confirm availability and authenticity before ordering.

Selection Notes

Select this component when high-side or low-side sensing requires a fixed 200 V/V gain to maximize resolution for small shunt voltages. The wide common-mode range accommodates bus voltages up to 110V without requiring level shifting. Consider the 1.1MHz bandwidth for applications demanding rapid over-current detection. Verify that the input bias current characteristics meet the precision requirements of your specific shunt resistor selection.

Part Context

This device belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for harsh automotive environments. It shares the same core topology and enhanced PWM rejection features as other variants in the series, differing primarily in fixed gain options ranging from 10 V/V to 200 V/V. The family is characterized by zero-drift technology and high common-mode rejection ratios suitable for demanding industrial and automotive applications.

Replacement Considerations

Direct functional substitutes within the same family include INA241A1QDRQ1, INA241A2QDRQ1, INA241A3QDRQ1, and INA241A4QDRQ1, which offer different fixed gains but share identical pinouts and performance characteristics. Non-family replacements require careful evaluation of gain, bandwidth, and common-mode voltage limits.