INA240A4D

Overview

The INA240A4D is a high-precision, bi-directional current sense amplifier from Texas Instruments. It features a fixed gain of 200 V/V and operates with a wide common-mode voltage range of -4 V to 80 V. The device supports both high-side and low-side sensing applications. Key electrical specifications include an input offset voltage of 5 µV, a gain error of 0.05%, and a bandwidth of 400 kHz. It functions within a supply voltage range of 2.7 V to 5.5 V and maintains operation across a temperature range of -40°C to +125°C.

Feature Summary

• Enhanced PWM rejection capability for noisy environments
• Bi-directional measurement with zero-drift architecture
• Wide common-mode voltage range supporting high-side and low-side configurations

Applications

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

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-8 package when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the ordering part number matches the required package variant and temperature grade. Cross-reference datasheet revisions to confirm pinout and electrical characteristics remain consistent with design requirements.

Selection Notes

Select this component for applications requiring high accuracy in bidirectional current sensing. The fixed 200 V/V gain simplifies signal conditioning by reducing external resistor requirements. Consider the 400 kHz bandwidth for dynamic load monitoring. Evaluate the -4 V to 80 V common-mode range against system rail voltages. The zero-drift technology minimizes offset errors over temperature variations compared to standard amplifiers.

Part Context

This device belongs to the INA240 family of current sense amplifiers designed for precision measurements. The family emphasizes enhanced PWM rejection and wide common-mode voltage capabilities. The 'A4' designation indicates a specific gain setting and accuracy class within the series. The 'D' suffix identifies the surface-mount SOIC-8 package option.

Replacement Considerations

INA240A4DR: Reel-packaged version of the same device. INA240A4PW: TSSOP-8 package variant. INA240A4PWR: TSSOP-8 reel-packaged variant.