INA241A5QDDFRQ1

Overview

The INA241A5QDDFRQ1 is an AEC-Q100 qualified, bidirectional ultra-precise current sense amplifier with a fixed gain of 200V/V. It operates over a wide common-mode voltage range from -5V to 110V and supports supply voltages between 2.7V and 20V. The device features enhanced PWM rejection for switching systems, achieving a typical DC CMRR of 166dB and a maximum offset voltage of ±8µV. It provides a high small-signal bandwidth of 1.1MHz at all gains and includes two reference pins for output adjustment.

Feature Summary

• Enhanced PWM rejection circuitry minimizes signal disturbance during large common-mode voltage transitions in switching systems.
• Ultra-precise measurement capability achieved through low offset voltage and minimal gain error across the operating temperature range.
• Bidirectional operation allows accurate current sensing independent of power supply voltage within the specified common-mode range.

Applications

• eTurbo/charger
• Electric power steering (EPS)
• Starter/generator
• Regenerative braking
• Brake system

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel specifications. Confirm the component meets AEC-Q100 Grade 1 requirements for automotive applications. Ensure the selected gain version aligns with the target full-scale output voltage and shunt resistor values for the intended design.

Selection Notes

Select this part when a fixed gain of 200V/V is required for high-side, inline, or low-side current sensing. The device is suitable for applications demanding high precision and fast response to over-current events. Consider the input bias current and noise density if designing for very low current ranges or sensitive analog front ends.

Part Context

This component belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. The 'A' designation indicates the highest accuracy grade within the series, featuring superior offset voltage and gain error specifications compared to other variants. It is manufactured by Texas Instruments for use in safety-critical vehicle systems.

Replacement Considerations

INA241B5QDDFRQ1 offers similar functionality but with lower precision specifications regarding offset voltage and gain error.

FAQ

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

The enhanced PWM rejection is optimized for systems subject to switching common-mode voltages up to 125kHz.

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

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