INA241B5QDGKRQ1

Overview

The INA241B5QDGKRQ1 is a bidirectional ultra-precise current sense amplifier with a gain of 200 V/V. It operates over a common-mode voltage range of -5V to 110V and supports supply voltages from 2.7V to 20V. The device features a small signal bandwidth of 1.1MHz, a maximum gain error of ±0.1%, and an input offset voltage of ±150µV. It includes enhanced PWM rejection for switching systems and meets AEC-Q100 Grade 1 standards for automotive applications.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients in switching systems.
• Bidirectional operation allows measurement of voltage drops across shunt resistors independent of the power supply voltage.
• High DC CMRR ensures excellent accuracy when measuring signals in high-voltage environments.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the gain version corresponds to the application requirements. Ensure compliance with AEC-Q100 Grade 1 specifications for the intended automotive environment. Check functional safety documentation availability if required for system design.

Selection Notes

Select this component for applications requiring high precision in high-side or low-side current sensing. The 200 V/V gain is suitable for detecting small voltage drops across low-value shunt resistors. Consider the wide common-mode range for compatibility with various bus voltages. Evaluate the thermal performance based on the VSSOP-8 package constraints.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive use. It shares core architectural features with other gain variants in the series but is distinguished by its fixed 200 V/V gain setting. The device is optimized for robust performance in electric vehicle powertrains and motor control systems.

Replacement Considerations

Other members of the INA241x-Q1 family offer different gain options such as 10V/V, 20V/V, 50V/V, and 100V/V. Verify that alternative gain settings meet the full-scale output voltage requirements of the target application before substitution.

FAQ

What is the maximum switching frequency supported by the enhanced PWM rejection?

The enhanced PWM rejection feature supports switching frequencies up to 125kHz.

How does the common-mode voltage range relate to the supply voltage?

The operational common-mode voltage range extends from -5V to 110V, which exceeds the device's operating supply voltage range of 2.7V to 20V.