INA240A4EDRQ1

Overview

The INA240A4EDRQ1 is a high-precision, bi-directional current sense amplifier designed for automotive applications. It features a fixed gain of 200 V/V and operates with a common-mode voltage range from -4 V to 80 V. The device utilizes zero-drift architecture to achieve ultra-low input offset voltage of 5 µV and input bias current of 90 µA. It provides enhanced PWM rejection capabilities and maintains a common-mode rejection ratio of 132 dB. Powered by a single supply between 2.7 V and 5.5 V, it offers a 3-dB bandwidth of 400 kHz and operates within an extended temperature range of -40°C to +150°C.

Feature Summary

• Bi-directional measurement capability allows detection of current flow in both directions across the shunt resistor.
• Enhanced PWM rejection circuitry effectively suppresses large dv/dt common-mode signals typical in motor control environments.
• Zero-drift topology ensures high accuracy by minimizing input offset voltage drift over temperature variations.
• Wide common-mode voltage range supports operation in high-side configurations up to 80 V.

Applications

• Automotive battery management systems
• Motor drive current sensing
• High-side load switch monitoring
• DC-DC converter output current measurement

Procurement Notes

Verify that the specific part marking corresponds to the AEC-Q100 qualified grade required for automotive integration. Confirm the suffix 'EDR' indicates the correct SOIC-8 package variant and reel packaging specifications. Ensure compatibility with the target system's thermal management requirements given the extended operating temperature limit. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency and electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when high accuracy is required in noisy automotive environments with significant common-mode voltage fluctuations. The fixed 200 V/V gain simplifies signal conditioning design by reducing the need for external amplification stages. Consider the 400 kHz bandwidth limitation when designing for high-frequency switching applications. The zero-drift technology makes it suitable for low-current measurements where offset errors would otherwise dominate the signal integrity.

Part Context

This device belongs to the INA240 family of current sense amplifiers, specifically tailored for automotive electronics. It shares architectural similarities with other zero-drift amplifiers but distinguishes itself through its robust 80 V common-mode range and specialized PWM rejection features. The Q1 designation confirms its qualification under automotive reliability standards, differentiating it from commercial-grade counterparts in the same series.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified current sense amplifiers with similar gain and common-mode ranges, such as the INA240A4DR or INA240A4QPWRQ1. Verify package compatibility and thermal performance when swapping between SOIC-8 and TSSOP-8 variants. Ensure that alternative devices offer comparable PWM rejection levels if used in high-noise motor control circuits.