INA240A2D

Overview

The INA240A2D is a bidirectional, ultra-precise current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 50 V/V and supports a common-mode voltage range from -4 V to 80 V. The device operates on a single supply voltage between 2.7 V and 5.5 V with a typical supply current of 2.4 mA. Key electrical specifications include an input offset voltage of 5 µV, an input bias current of 90 µA, and a common-mode rejection ratio of 132 dB. The amplifier provides a 3-dB bandwidth of 400 kHz and maintains a gain error of 0.05%. It is housed in an 8-SOIC package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Bidirectional current sensing capability for both high-side and low-side applications
• Ultra-precision performance characterized by low input offset voltage and minimal gain error
• Enhanced PWM rejection for accurate measurements in noisy switching environments

Applications

• Industrial motor control systems
• Power supply monitoring circuits
• Battery management systems

Procurement Notes

Verify the specific suffix D indicates tube packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation. Check for end-of-life notifications as availability may be limited. Ensure the operating temperature range meets system requirements. Validate pinout compatibility during PCB layout integration.

Selection Notes

Select this component for applications requiring high accuracy in bidirectional current measurement. The fixed 50 V/V gain simplifies signal conditioning design. Consider the 80 V common-mode range for high-voltage bus monitoring. Evaluate the 400 kHz bandwidth against signal frequency requirements. Compare power consumption against battery-operated constraints.

Part Context

This part belongs to the INA240 family of current sense amplifiers designed for precision measurement. The A2 variant specifies the 50 V/V gain configuration. The D suffix denotes the SOIC-8 surface-mount package. This series targets industrial and automotive environments demanding robust performance.

Replacement Considerations

INA240A2DR: Same electrical specifications but supplied in tape-and-reel packaging instead of tubes.