INA241A1QDDFRQ1

Overview

The INA241A1QDDFRQ1 is an ultra-precise, bidirectional current sense amplifier designed for automotive applications. It features a wide common-mode voltage range from -5V to 110V and operates on a supply voltage of 2.7V to 20V. The device provides a fixed gain of 10V/V with a maximum gain error of ±0.01% and a typical DC CMRR of 166dB. Key electrical specifications include a small signal bandwidth of 1.1MHz, a slew rate of 8V/µs, and a step response settling time to 1% of 1µs. It incorporates enhanced PWM rejection optimized for switching frequencies up to 125kHz.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients at the inputs.
• Ultra-precise measurement capability achieved through low offset voltage and minimal gain error across the operating temperature range.
• Bidirectional operation allows for accurate current sensing in both directions over a wide common-mode voltage range independent of supply voltage.

Applications

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

Procurement Notes

Verify the specific suffix DDFFRQ1 corresponds to the SOT-23-8 package and AEC-Q100 Grade 1 qualification when ordering. Confirm that the functional safety documentation requirements are met for your system design. Ensure the supply voltage remains within the 2.7V to 20V range during operation. Check for any recent product change notifications regarding packaging or material composition updates.

Selection Notes

Select this component for high-voltage bidirectional current sensing where precision is critical. The 10V/V gain is suitable for applications requiring moderate amplification of shunt resistor voltage drops. Consider the thermal resistance characteristics if operating in high ambient temperatures. Verify that the input common-mode voltage does not exceed the absolute maximum ratings during transient events.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers from Texas Instruments. The 'A' designation indicates the highest accuracy grade with ±0.01% max gain error. The '1' suffix specifies the 10V/V gain option. The 'Q1' suffix denotes AEC-Q100 automotive qualification. The 'DDF' package code identifies the SOT-23-8 surface-mount housing.

Replacement Considerations

INA241A1-Q1: Non-automotive version with similar electrical characteristics but without AEC-Q100 qualification. INA241B1-Q1: Automotive version with lower precision specifications including higher offset voltage and gain error.