INA241A4QDRQ1

Overview

The INA241A4QDRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It features a fixed gain of 100 V/V and operates within a wide common-mode voltage range of -5V to 110V, independent of the supply voltage. The device supports a supply voltage between 2.7V and 20V with a typical quiescent current of 2.5mA. It offers a small-signal bandwidth of 1.1MHz, a maximum offset voltage of ±10µV, and a maximum gain error of ±0.01%. The component is AEC-Q100 qualified for Grade 1 automotive applications, functioning reliably from -40°C to +125°C.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific ordering suffix QDRQ1 corresponds to the SOIC-8 package and Grade 1 temperature rating during procurement. Confirm that the AEC-Q100 qualification aligns with the target automotive application requirements. Ensure the selected gain matches the system's dynamic range needs before finalizing orders.

Selection Notes

Select this component when a fixed 100 V/V gain is required for high-side or low-side current sensing. It is suitable for switching systems experiencing large common-mode voltage transients due to its enhanced PWM rejection capabilities. Consider the 1.1MHz bandwidth for applications requiring rapid over-current event detection.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise, bidirectional current sense amplifiers designed for automotive environments. The 'A' designation indicates the version with superior precision specifications compared to the 'B' variant. The 'Q1' suffix denotes AEC-Q100 qualification for automotive use, while 'D' specifies the SOIC-8 package type.

Replacement Considerations

INA241A4QPWRQ1

FAQ

What is the maximum survival voltage for the INA241A4QDRQ1?

The device can withstand a survival common-mode voltage range of -20V to 120V.

How does the INA241A4QDRQ1 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 to the output.