INA240A2DR

Overview

The INA240A2DR is a unidirectional current sense amplifier from Texas Instruments, housed in an 8-SOIC package. It features a fixed gain of 50 V/V and supports bidirectional operation with a common-mode voltage range of -4 V to 80 V. Key electrical specifications include a maximum input offset voltage of 5 µV, a supply current of 1.8 mA, and a 3dB bandwidth of 400 kHz. The device operates within a supply voltage range of 2.7 V to 5.5 V and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Ultra-precise performance with low input offset voltage and high common-mode rejection ratio for accurate measurements
• Wide common-mode voltage range supporting both high-side and low-side configurations
• Bidirectional sensing capability allows detection of current flow in either direction

Applications

• Industrial process control systems requiring precise current monitoring
• Power supply output current sensing
• Motor control applications involving bidirectional current measurement

Procurement Notes

Verify the specific suffix 'A2' corresponds to the required gain setting of 50 V/V during procurement. Confirm that the SOIC-8 package variant matches the target PCB footprint requirements. Ensure compatibility with the intended operating temperature range and supply voltage constraints before finalizing orders.

Selection Notes

Select this component when a fixed gain of 50 V/V is required for high-precision current sensing. It is suitable for designs needing wide common-mode voltage tolerance up to 80 V. Consider the 8-SOIC package for surface-mount assembly needs. Evaluate if the 400 kHz bandwidth meets the signal frequency requirements of the application.

Part Context

This part belongs to the INA240 family of ultra-precise current sense amplifiers designed for robust industrial environments. The series offers various gain options and package types to accommodate different system architectures. The A2 designation specifically indicates the internal resistor network configuration providing the 50 V/V gain characteristic.

FAQ

Is the INA240A2DR capable of measuring negative currents?

Yes, despite being described as unidirectional in some contexts regarding pinout, the device supports bidirectional current sensing, allowing it to detect current flow in both directions relative to the reference.

What is the fixed voltage gain of the INA240A2DR?

The INA240A2DR has a fixed non-inverting voltage gain of 50 V/V.