INA241A4QDDFRQ1

Overview

The INA241A4QDDFRQ1 is an AEC-Q100 qualified, bidirectional ultra-precise current sense amplifier with a fixed gain of 100V/V. It operates over a wide common-mode voltage range from -5V to 110V and supports supply voltages between 2.7V and 20V. Key electrical specifications include a maximum offset voltage of ±10µV, a typical DC CMRR of 166dB, and a small-signal bandwidth of 1.1MHz at all gains. The device features enhanced PWM rejection for switching systems and draws a typical quiescent current of 2.5mA.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients in switching systems.
• Ultra-precise measurement capability achieved through low input offset voltage and high DC common-mode rejection ratio.
• Bidirectional operation allows accurate current sensing across the full specified common-mode voltage range independent of supply voltage.

Applications

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

Procurement Notes

Verify the specific suffix QDDFRQ1 corresponds to the SOT-23-8 package and automotive Grade 1 qualification. Confirm that the ordering code matches the required 100V/V gain variant within the INA241A family. Ensure compatibility with the target PCB footprint and thermal requirements for the DDF package type.

Selection Notes

Select this component when a fixed 100V/V gain is required for high-side or low-side bidirectional current sensing. It is suitable for applications involving high common-mode voltages up to 110V and significant switching noise. Consider the 1.1MHz bandwidth and fast settling time for rapid over-current detection needs.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. The 'A' designation indicates the highest precision grade with minimal gain error and offset drift. The '4' suffix specifies the 100V/V gain configuration, distinguishing it from other variants offering 10V/V, 20V/V, 50V/V, or 200V/V gains.

Replacement Considerations

INA241A4-Q1

FAQ

What is the maximum survival voltage for the INA241A4QDDFRQ1?

The device supports a survival voltage range of -20V to 120V, exceeding its operational common-mode range.

How does the device handle common-mode transients?

It utilizes enhanced PWM rejection circuitry that holds the output for 1µs during large common-mode transients to prevent signal propagation errors.