INA240A3DR

Overview

The INA240A3DR is a unidirectional current sense amplifier manufactured by Texas Instruments, housed in an 8-SOIC package. It features a fixed gain of 100 V/V and supports a common-mode voltage range from -4 V to 80 V. The device operates on a supply voltage between 2.7 V and 5.5 V with a typical supply current of 2.4 mA. Key electrical specifications include a maximum input offset voltage of 5 µV, a gain error of 0.05%, and a 3dB bandwidth of 400 kHz. It provides a common-mode rejection ratio of 132 dB and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Supports bidirectional current sensing with high common-mode voltage tolerance up to 80 V
• Delivers ultra-precision performance with low input offset voltage and minimal gain error
• Provides enhanced PWM rejection capabilities for noisy switching environments

Applications

• High-side and low-side current monitoring in industrial automation systems
• Battery management and protection circuits in electric vehicles
• Power supply overcurrent detection and load management

Procurement Notes

Verify the specific suffix 'DR' corresponds to the SOIC-8 tape and reel packaging configuration required for automated assembly processes. Confirm that the A3 variant matches the intended gain specification of 100 V/V for the target application design. Ensure compliance with RoHS directives and moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when a fixed gain of 100 V/V is required for precise current measurement applications. The wide common-mode voltage range allows flexibility in both high-side and low-side placement relative to the load. Consider the thermal performance and package size constraints associated with the SOIC-8 footprint for PCB layout optimization.

Part Context

This part belongs to the INA240 family of zero-drift current sense amplifiers designed for high-accuracy measurements. The series emphasizes stability across temperature variations and offers robust rejection of pulse-width modulation noise. It serves as a specialized solution for demanding power monitoring tasks where standard amplifiers may lack sufficient precision or common-mode range.

Replacement Considerations

Direct substitutes within the same family include the INA240A3PWR, which shares identical electrical characteristics but utilizes an 8-TSSOP package instead of the SOIC-8 form factor.