INA241B1QDGKRQ1

Overview

The INA241B1QDGKRQ1 is an ultra-precise, bidirectional current sense amplifier from the Texas Instruments INA241x-Q1 family. It features a gain of 10V/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 maximum offset voltage of ±150µV, and a typical DC CMRR of 130dB. It offers a small-signal bandwidth of 1.1MHz and draws a quiescent current of 2.5mA. The component is housed in an 8-pin VSSOP package.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbances caused by large common-mode voltage transients at the inputs.
• 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 supply voltage.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm AEC-Q100 qualification status aligns with automotive functional safety requirements. Ensure the selected gain version corresponds to the application's dynamic range needs. Cross-reference the datasheet revision date to confirm compatibility with existing design documentation.

Selection Notes

Select this part when high precision is required in switching environments with significant common-mode noise. The B-grade variant offers a balance of cost and performance suitable for many automotive applications. Consider the 10V/V gain setting against available shunt resistor values to optimize output swing. Evaluate thermal dissipation requirements based on the VSSOP-8 package thermal resistance metrics.

Part Context

This component belongs to the INA241x-Q1 series of ultra-precise current sense amplifiers designed for automotive use. It complements other variants like the INA241A1QDGKRQ1 which offer tighter accuracy specifications. The series provides multiple gain options to suit different current sensing ranges while maintaining consistent bandwidth and common-mode rejection characteristics across all versions.

Replacement Considerations

INA241A1QDGKRQ1 offers higher precision with lower offset and gain error but may have different thermal or cost implications.

FAQ

How does the enhanced PWM rejection feature function?

The internal circuitry holds the output stable for 1µs during large common-mode transients, preventing disturbance propagation to the output signal.

What is the survival voltage range for the device?

The device can withstand survival voltages ranging from -20V to 120V, exceeding its operational common-mode range.