INA241B4QDDFRQ1

Overview

The INA241B4QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a gain of 100 V/V. It operates over a common-mode voltage range of -5V to 110V and supports a supply voltage from 2.7V to 20V. The device features enhanced PWM rejection for switching systems, a small signal bandwidth of 1.1MHz, and a maximum gain error of ±0.1%. It is specified for operating temperatures between -40°C and 125°C.

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 precision achieved through low offset voltage and high DC common-mode rejection ratio.

Applications

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

Procurement Notes

Verify that the specific suffix QDDFRQ1 corresponds to the automotive grade B version with 100 V/V gain in the SOT-23-8 package. Confirm the datasheet revision matches the required specifications for your design. Ensure the ordering information aligns with Texas Instruments official documentation before finalizing procurement.

Selection Notes

Select this component when high accuracy is required in environments with significant common-mode noise or switching transients. The 100 V/V gain is suitable for applications requiring precise amplification of small differential signals. Consider the thermal characteristics of the SOT-23-8 package if heat dissipation is a constraint in the system layout.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive applications. It shares functional similarities with other gains in the series but is distinct due to its specific 100 V/V gain setting and B-grade accuracy specifications. The Q1 suffix indicates compliance with automotive reliability standards.

Replacement Considerations

Other members of the INA241x-Q1 family may serve as substitutes if different gain values are acceptable. Verify pin compatibility and electrical specifications against the target application requirements before substitution.

FAQ

What is the maximum common-mode voltage supported by the INA241B4QDDFRQ1?

The device supports an operational common-mode voltage range from -5V to 110V.

How does the enhanced PWM rejection feature benefit the circuit?

It reduces output disturbances caused by large common-mode voltage transitions, ensuring accurate current measurements in switching systems.