INA241B3QDGKRQ1

Overview

The INA241B3QDGKRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a fixed gain of 50 V/V. It operates over a common-mode voltage range of -5V to 110V and supports supply voltages from 2.7V to 20V. The device features enhanced PWM rejection for switching systems up to 125kHz, a small-signal bandwidth of 1.1MHz, and a slew rate of 8V/µs. Electrical specifications include a maximum gain error of ±0.1%, a maximum offset voltage of ±150µV, and a typical DC CMRR of 130dB. It is housed in an 8-pin VSSOP package.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output disturbances caused by high-speed common-mode transients associated with switching frequencies up to 125kHz.
• Bidirectional operation allows accurate measurement of voltage drops across shunt resistors over a wide common-mode range independent of the supply voltage.
• High small-signal bandwidth of 1.1MHz at all gain options enables rapid detection and processing of over-current events.

Applications

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

Procurement Notes

Verify the specific suffix DGKR indicates the VSSOP-8 package and tape-and-reel delivery format. Confirm the B3 designation corresponds to the 50 V/V gain variant and Grade 1 temperature rating. Ensure the Q1 suffix aligns with automotive qualification requirements. Cross-reference the manufacturer part number against official datasheets to validate pinout and electrical tolerances before integration.

Selection Notes

Select this component when a fixed 50 V/V gain is required for bidirectional sensing within a -5V to 110V common-mode window. The B-series offers standard precision suitable for general automotive control loops. Consider the VSSOP-8 package for space-constrained PCB layouts. Evaluate thermal performance based on the junction-to-ambient resistance specified for the DGK package type under expected operating loads.

Part Context

This device belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. The family provides multiple gain options ranging from 10 V/V to 200 V/V. The B-series variants offer standard accuracy specifications compared to the higher-precision A-series. All members share the same core architecture featuring enhanced PWM rejection and wide common-mode input capabilities.

Replacement Considerations

INA241A3QDGKRQ1: Offers higher precision with lower offset voltage and gain error but maintains identical gain and package.