INA241B5QDRQ1

Overview

The INA241B5QDRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier from Texas Instruments. It features a fixed gain of 200 V/V and operates with a supply voltage range of 2.7V to 20V. The device supports a wide common-mode input voltage range from -5V to 110V. Key electrical specifications include a maximum gain error of ±0.1%, a typical DC CMRR of 130dB, and a small-signal bandwidth of 1.1MHz at all gains. It is housed in a VSSOP-10 package.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients associated with switching systems.
• Bidirectional operation allows for accurate measurement of voltage drops across shunt resistors regardless of current direction.
• Wide common-mode voltage range enables high-side, low-side, and inline sensing applications independent of the power supply voltage.

Applications

• Electric power steering (EPS)
• Regenerative braking systems
• Motor drivers

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel configuration. Confirm the temperature grade aligns with the target operating environment requirements. Ensure the component meets the necessary automotive qualification standards for the intended application before finalizing procurement.

Selection Notes

Select this part when a high gain of 200 V/V is required to amplify small differential signals. The B-version offers a balance of precision and cost compared to the A-version. Consider the 1.1MHz bandwidth for fast transient detection needs. Verify that the 200 V/V gain does not cause output saturation within the expected supply voltage limits.

Part Context

This component belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive applications. The family includes variants with different gain options ranging from 10 V/V to 200 V/V. The 'B' designation indicates the specific accuracy class, while the 'Q1' suffix denotes AEC-Q100 qualification for automotive use.

Replacement Considerations

INA241A5QDRQ1 offers higher precision with lower offset voltage and gain error but may have different thermal characteristics. Other family members like INA241B3QDRQ1 provide lower gain options if system dynamic range permits.