INA241B1QDDFRQ1

Overview

The INA241B1QDDFRQ1 is an ultra-precise, bidirectional current sense amplifier from the Texas Instruments INA241x-Q1 family. It features a gain of 10 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 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 DDF (SOT-23) package.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbances 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)
• Starter/generator systems
• Regenerative braking circuits

Procurement Notes

Verify the specific suffix QDDF corresponds to the SOT-23-8 package and Grade 1 temperature rating (-40°C to 125°C). Confirm AEC-Q100 qualification status matches automotive requirements. Ensure the ordering part number aligns with the required 10V/V gain configuration within the INA241B series.

Selection Notes

Select this component when high precision is required in environments with significant common-mode noise or switching transients. The 10V/V gain is suitable for applications requiring moderate amplification of shunt voltages. Consider the thermal characteristics of the DDF package if operating near the upper temperature limits.

Part Context

This device belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive applications. It shares functional similarities with other members like the INA241A1-Q1 but differs in accuracy grades. The 'B' designation indicates a specific accuracy tier compared to the 'A' version, while the 'Q1' suffix denotes automotive qualification.

Replacement Considerations

INA241B1QDRQ1

FAQ

What is the maximum survival voltage for the common-mode input?

The INA241B1QDDFRQ1 supports a survival common-mode voltage range of -20V to 120V.

How does the device handle common-mode transients?

It utilizes enhanced PWM rejection circuitry that holds the output for 1µs during large common-mode transients to prevent disturbance propagation.