INA241A4QDGKRQ1

Overview

The INA241A4QDGKRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It measures voltage drops across shunt resistors over a wide common-mode range of -5V to 110V, independent of the supply voltage. The device features a fixed gain of 100V/V and operates on a supply voltage between 2.7V and 20V. Key electrical parameters include a maximum offset voltage of ±10µV, a typical DC CMRR of 166dB, and a small signal bandwidth of 1.1MHz at all gains. It draws 2.5mA of quiescent current and supports switching frequencies up to 125kHz with enhanced PWM rejection.

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 offset voltage and minimal gain error.
• Bidirectional operation allows for accurate current measurement in both directions across the specified common-mode range.

Applications

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

Procurement Notes

Verify the specific suffix 'DGKR' corresponds to the VSSOP-8 package and reel packaging configuration required for your assembly process. Confirm that the AEC-Q100 Grade 1 qualification meets your automotive temperature requirements of -40°C to 125°C. Ensure the 100V/V gain option aligns with your shunt resistor selection and desired output dynamic range before finalizing procurement.

Selection Notes

Select this component when high precision is required in switching environments with significant common-mode noise. The 100V/V gain is suitable for applications needing substantial signal amplification from small shunt voltages. Consider the 1.1MHz bandwidth for fast over-current detection. Verify that the -5V to 110V common-mode range covers your system's bus voltage peaks and negative transients.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise, bidirectional current sense amplifiers designed for automotive applications. The 'A4' designation indicates a fixed gain of 100V/V, while 'DGKR' specifies the VSSOP-8 package with tape-and-reel shipping. It is functionally comparable to other INA241 variants but offers specific gain and packaging configurations tailored for high-side, inline, or low-side sensing.

Replacement Considerations

Direct substitutes within the same family include INA241A3QDGKRQ1 (50V/V gain) and INA241A5QDGKRQ1 (200V/V gain). For different gain requirements, consider INA241A1QDGKRQ1 (10V/V) or INA241A2QDGKRQ1 (20V/V). All share identical pinouts, packages, and core specifications except for gain and minor offset variations.