INA240A3D

Overview

The INA240A3D is a high-precision, bidirectional current sense amplifier from Texas Instruments. It features a fixed gain of 100 V/V and operates with a common-mode voltage range of -4 V to 80 V. Key electrical parameters include an input offset voltage of 5 µV, a common-mode rejection ratio (CMRR) of 132 dB, and a 3dB bandwidth of 400 kHz. The device functions on a supply voltage between 2.7 V and 5.5 V, drawing 2.4 mA of quiescent current. It is housed in an SOIC-8 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Zero-drift architecture ensures ultra-low input offset voltage and drift for high accuracy.
• Bidirectional sensing capability allows detection of current flow in both directions.
• Wide common-mode voltage range supports high-side and low-side configurations.

Applications

• Industrial process control systems
• Power supply monitoring
• Motor control applications

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-8 tube packaging configuration rather than tape-and-reel variants. Confirm that the A3 grade meets the required gain accuracy specifications for the design. Ensure compatibility with the target PCB footprint and thermal management requirements for the SOIC-8 package during integration.

Selection Notes

Select this component when precise bidirectional current measurement is required within a wide common-mode voltage window. The fixed 100 V/V gain simplifies signal conditioning for downstream ADCs. Consider the zero-drift technology if long-term stability and minimal calibration are critical design constraints compared to standard amplifiers.

Part Context

This part belongs to the INA240 family of current sense amplifiers designed for high-performance applications. The family offers various gain options and packages. The INA240A3D specifically provides the 100 V/V gain variant in a surface-mount SOIC-8 package, distinguishing it from other gain codes and TSSOP alternatives within the same series.

Replacement Considerations

INA240A3DR: Identical electrical characteristics but supplied in tape-and-reel packaging instead of tubes.