INA241A2QDGKRQ1

Overview

The INA241A2QDGKRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments designed for automotive applications. 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 20V/V with a small signal bandwidth of 1.1MHz. Key electrical characteristics include a maximum gain error of ±0.01%, a typical DC CMRR of 166dB, and a maximum input offset voltage of ±15µV. It is qualified under AEC-Q100 Grade 1 standards for operation in temperatures ranging from -40°C to +125°C.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output disturbances caused by large common-mode voltage transients associated with switching systems.
• Ultra-precise measurement capability achieved through low offset voltage and high DC common-mode rejection ratio.
• Bidirectional operation allows for accurate current sensing across the full common-mode input range independent of the supply voltage.

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 AEC-Q100 Grade 1 qualification aligns with the target automotive temperature range requirements. Ensure the design accounts for the specified common-mode voltage limits and supply voltage constraints during integration.

Selection Notes

Select this component when high precision and fast response are required in high-voltage automotive environments. The 20V/V gain is suitable for applications requiring moderate amplification of shunt resistor voltage drops. Consider the enhanced PWM rejection feature if the system is subject to significant switching noise or high-frequency common-mode transitions.

Part Context

This part belongs to the INA241x-Q1 family of current sense amplifiers. It shares the same core architecture and performance metrics as other variants in the series, differing primarily in gain settings and package options. The 'A' designation indicates the ultra-precise version with tighter accuracy specifications compared to the standard B grade.

Replacement Considerations

Direct substitutes within the same family include INA241A1QDGKRQ1 (10V/V), INA241A3QDGKRQ1 (50V/V), INA241A4QDGKRQ1 (100V/V), and INA241A5QDGKRQ1 (200V/V). These parts share identical pinouts and functional capabilities but offer different fixed gains to suit various shunt resistor values and output dynamic range requirements.