INA241A1QDGKRQ1

Overview

The INA241A1QDGKRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It features a wide common-mode voltage range of -5V to 110V and operates on a supply voltage between 2.7V and 20V. The device provides a fixed gain of 10V/V with a small signal bandwidth of 1.1MHz. Key electrical characteristics include a maximum offset voltage of ±20µV, a typical DC CMRR of 166dB, and a quiescent current of 2.5mA. It is qualified under AEC-Q100 Grade 1 for automotive applications.

Feature Summary

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

Applications

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

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 your target automotive environment. Ensure the design accounts for the specified thermal resistance values associated with the VSSOP-8 package during implementation.

Selection Notes

Select this part when high precision is required alongside robust performance against switching noise. The 10V/V gain option suits applications where maximizing output dynamic range relative to the shunt voltage drop is necessary. Consider the 1.1MHz bandwidth for fast over-current detection needs in motor control or power conversion topologies.

Part Context

This component belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. It shares core architectural features with other variants in the series, differing primarily in fixed gain settings and specific grade qualifications. The DGKR suffix indicates the VSSOP-8 package configuration.

Replacement Considerations

Direct substitutes within the same family include INA241A2QDGKRQ1, INA241A3QDGKRQ1, INA241A4QDGKRQ1, and INA241A5QDGKRQ1, which offer different fixed gains while maintaining identical package and qualification standards.

FAQ

How does the device handle large common-mode voltage transitions?

The INA241A1QDGKRQ1 utilizes enhanced PWM rejection circuitry that holds the output for 1µs during large common-mode transients, preventing disturbances from propagating to the output signal.

What is the maximum common-mode voltage the device can withstand?

The operational common-mode input range extends from -5V to 110V, independent of the supply voltage.