INA241A1QDRQ1

Overview

The INA241A1QDRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It features a fixed gain of 10 V/V and operates with a supply voltage range of 2.7V to 20V. The device supports a wide common-mode input voltage range from -5V to 110V. Key electrical specifications include a maximum offset voltage of ±20µV, a typical DC CMRR of 166dB, and a small-signal bandwidth of 1.1MHz. It is housed in an SOIC-8 package and meets AEC-Q100 Grade 1 qualification for automotive applications.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients at the inputs.
• Ultra-precision architecture ensures high accuracy through low offset voltage and minimal gain error across the operating temperature range.
• Bidirectional operation allows for accurate measurement of current flow in both directions over a wide common-mode voltage range.

Applications

• Electric power steering (EPS)
• Starter/generator systems
• Regenerative braking circuits
• Brake system monitoring

Procurement Notes

Verify that the specific part number matches the required gain configuration and package type. Confirm AEC-Q100 Grade 1 qualification requirements against the target application's temperature grade specifications. Ensure compatibility with the intended PCB footprint for the SOIC-8 package before finalizing procurement orders.

Selection Notes

Select this component when high precision is required alongside robust performance in noisy switching environments. The 10 V/V gain option is suitable for applications requiring lower amplification factors while maintaining high bandwidth. Consider the wide common-mode range if the sensing point exceeds the local supply voltage.

Part Context

This device belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive use. The 'A' designation indicates the highest precision tier within the series, characterized by significantly lower offset voltage and drift compared to other variants. The 'Q1' suffix confirms its compliance with automotive reliability standards.

Replacement Considerations

INA241A1-Q1