INA240A1QPWRQ1

Overview

The INA240A1QPWRQ1 is a zero-drift, high-side current sense amplifier from Texas Instruments, designed for automotive applications under AEC-Q100 standards. It features an enhanced PWM suppression capability to handle high common-mode transients in systems with pulse-width modulation signals. The device operates within a wide common-mode voltage range of -4V to 80V, allowing it to function below ground potential during flyback periods typical in solenoid applications. It provides a voltage output proportional to the shunt resistor drop, independent of the supply voltage.

Feature Summary

• Enhanced PWM suppression for accurate measurement amidst high-voltage transients
• Wide common-mode voltage range supporting negative voltages
• Zero-drift architecture ensuring high precision without external trimming

Applications

• Automotive solenoid control circuits
• Systems utilizing pulse-width modulation (PWM) signals
• High-side current sensing in automotive power distribution

Procurement Notes

Verify the specific suffix 'A1' corresponds to the required gain setting and package type against the official datasheet. Confirm AEC-Q100 qualification status if automotive reliability is mandatory. Ensure the operating temperature range meets system requirements. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Check for any recent product change notices regarding packaging or marking updates.

Selection Notes

Select this component when high accuracy is required in noisy environments with significant common-mode voltage fluctuations. The zero-drift technology eliminates the need for periodic calibration. Consider the -4V to 80V input range for applications involving inductive loads or ground shifts. Evaluate the PWM suppression feature if the system employs high-frequency switching signals that could otherwise distort current measurements.

Part Context

This device belongs to the INA240 family of current sense amplifiers. It shares core architectural features with other variants in the series but differs in gain configuration and package options. The Q1 designation indicates compliance with automotive quality standards, distinguishing it from commercial-grade counterparts. It serves as a specialized solution for demanding automotive sensing tasks requiring robustness against electrical noise.

Replacement Considerations

Direct substitutes include other INA240 variants such as INA240A2QPWRQ1 or INA240A3QPWRQ1, depending on the required gain factor. Non-qualifying replacements like the standard INA240 exist but lack automotive certification. Verify pin compatibility and thermal performance before swapping with similar devices from other manufacturers.