INA240A1PWR

Overview

The INA240A1PWR is a unidirectional current sense amplifier manufactured by Texas Instruments, housed in an 8-pin TSSOP package. It features a fixed gain of 20 V/V and supports a wide common-mode voltage range from -4 V to 80 V. The device operates on a single supply voltage between 2.7 V and 5.5 V with a maximum quiescent current of 2.4 mA. Key electrical specifications include a maximum input offset voltage of 5 µV, a DC common-mode rejection ratio (CMRR) of 132 dB, and a 3-dB bandwidth of 400 kHz. It functions within an extended temperature range of -40°C to +125°C.

Feature Summary

• Enhanced PWM suppression capability for accurate current measurement in noisy environments
• Wide common-mode voltage range supporting high-side and low-side configurations
• Ultra-precise architecture with minimal offset voltage and drift

Applications

• Motor drive systems
• Solenoid control circuits
• Power supply monitoring

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-8 package and tape-and-reel shipping configuration as documented in the official datasheet. Confirm that the A1 variant matches the required 20 V/V gain setting for your circuit design. Ensure compliance with RoHS directives and moisture sensitivity levels specified by the manufacturer before integration into production workflows.

Selection Notes

Select this component when a fixed 20 V/V gain is sufficient for the target current sensing application. The wide common-mode range allows flexibility in both high-side and low-side placement relative to the load. Consider the 400 kHz bandwidth and enhanced PWM rejection if the operating environment contains significant switching noise or fast transient signals.

Part Context

This device belongs to the INA240 family of current sense amplifiers designed for bidirectional and unidirectional applications. The family offers multiple gain options to accommodate different shunt resistor values and signal requirements. The INA240 series is characterized by its ability to operate independently of the power supply voltage, making it suitable for various industrial and automotive electronics.

Replacement Considerations

Other variants within the INA240 family, such as INA240A2PWR, INA240A3PWR, and INA240A4PWR, offer different fixed gains of 50 V/V, 100 V/V, and 200 V/V respectively while maintaining similar pinouts and performance characteristics.