INA240A3QPWRQ1

Overview

The INA240A3QPWRQ1 is an automotive-grade, zero-drift current sense amplifier manufactured by Texas Instruments. It features a wide common-mode voltage range from -4 V to 80 V and operates on a single supply voltage between 2.7 V and 5.5 V. The device provides a fixed gain of 100 V/V with a 3dB bandwidth of 400 kHz. Key electrical specifications include a maximum input offset voltage of 5 µV, a common-mode rejection ratio (CMRR) of 132 dB, and a quiescent current of 2.4 mA. It is housed in an 8-pin TSSOP package.

Feature Summary

• Zero-drift architecture ensures high precision with minimal offset voltage drift over temperature variations.
• Enhanced PWM suppression capability effectively rejects high common-mode transients for accurate measurements in noisy environments.
• Wide common-mode voltage range allows operation from -4 V to 80 V, supporting negative voltage sensing below ground.

Applications

• Automotive battery management systems
• Motor control circuits
• High-side current sensing in power supplies

Procurement Notes

Verify the specific suffix 'A3' indicates the fixed gain configuration during procurement. Confirm AEC-Q100 qualification status is required for your automotive application tier. Ensure the TSSOP-8 package matches your PCB footprint constraints. Check RoHS compliance documentation if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when high accuracy is required in high-voltage or noisy automotive environments. The zero-drift technology eliminates the need for external calibration in many applications. Consider the 400 kHz bandwidth for dynamic load monitoring. The wide common-mode range simplifies high-side placement without level shifting.

Part Context

This part belongs to the INA240-Q1 family of current sense amplifiers designed for robust performance in automotive electronics. It complements other sensors by providing precise differential voltage measurement across shunt resistors. The Q1 designation confirms its suitability for demanding automotive reliability standards.

FAQ

What is the maximum common-mode voltage supported?

The device supports a common-mode voltage range from -4 V to 80 V.

Does this amplifier require external calibration?

Due to its zero-drift architecture and low initial offset voltage of 5 µV, external calibration is often unnecessary for high-precision applications.