INA240A1DR

Overview

The INA240A1DR is a unidirectional current sense amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. It features a fixed gain of 20 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 1.8 mA. Key electrical specifications include a maximum input offset voltage of 5 µV, a gain error of 0.05%, and a 3-dB bandwidth of 400 kHz. It provides a high 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 a wide common-mode voltage range extending from negative potentials up to 80 V.
• Delivers ultra-precise measurement performance characterized by low input offset voltage and minimal gain error.
• Provides high common-mode rejection capability to maintain accuracy in noisy environments.

Applications

• High-side and low-side current monitoring in industrial automation systems
• Battery management and protection circuits in portable devices
• Overcurrent protection mechanisms in power distribution units

Procurement Notes

Verify the specific suffix DR indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the SOIC-8 footprint matches your PCB design constraints. Cross-reference the manufacturer part number with distributor codes to avoid substitution errors during procurement.

Selection Notes

Select this component when a fixed 20 V/V gain is required for precise current measurement. Consider the 80 V common-mode range for high-voltage bus monitoring applications. Evaluate the 400 kHz bandwidth against signal frequency requirements. Compare alternative gain variants within the INA240 family if different amplification factors are needed for specific shunt resistor values.

Part Context

This device belongs to the INA240 series of precision current sense amplifiers designed for robust operation in demanding electrical environments. The series offers various gain options and packaging styles to suit different system integration needs while maintaining consistent high accuracy and wide common-mode voltage capabilities across the product line.

Replacement Considerations

INA240A1D is the tube-packaged equivalent of this reel-delivered component. Other gain variants such as INA240A2DR or INA240A3PWR offer different amplification factors but share similar functional characteristics and pinouts within the same family.