INA240A2PWR

Overview

The INA240A2PWR is a unidirectional current-sense amplifier manufactured by Texas Instruments. It features a fixed gain of 50 V/V and supports a 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 typical supply current of 1.8 mA. Key electrical specifications include an input offset voltage of 5 µV, a gain error of 0.05%, and a CMRR of 132 dB. It offers a 3-dB bandwidth of 400 kHz and a slew rate of 2 V/µs. The component is housed in an 8-TSSOP package 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 voltages up to 80 V.
• Provides high precision with ultra-low input offset voltage and minimal gain error for accurate measurements.
• Features high common-mode rejection ratio to maintain accuracy in noisy environments.
• Operates efficiently with low supply current consumption.

Applications

• High-side or low-side current monitoring in power distribution systems
• Battery management systems in electric vehicles and industrial equipment
• Motor control applications requiring precise current feedback
• Overcurrent protection circuits in industrial automation

Procurement Notes

Verify the specific suffix 'A2' confirms the fixed 50 V/V gain configuration, as other suffixes may indicate different gains. Ensure the 'PWR' designation matches the required 8-TSSOP surface-mount package. Confirm RoHS compliance status if environmental regulations apply to your assembly process. Cross-reference the manufacturer part number against official Texas Instruments documentation to ensure authenticity and correct revision level before procurement.

Selection Notes

Select this component when a fixed gain of 50 V/V is required for current sensing applications. It is suitable for designs needing operation with common-mode voltages up to 80 V while maintaining high accuracy. Consider the 8-TSSOP package constraints for PCB layout. Evaluate the 400 kHz bandwidth against signal frequency requirements. Compare supply current and offset voltage specifications against alternative amplifiers if lower power or higher precision is needed.

Part Context

The INA240A2PWR belongs to the INA240 family of ultra-precise current-sense amplifiers. This series is designed for robust performance in demanding industrial and automotive environments. The A2 variant specifically denotes the 50 V/V gain option within the product line. The PWR suffix indicates the TSSOP packaging style. These amplifiers are engineered to provide reliable current measurement across a wide common-mode voltage range.

Replacement Considerations

Check for compatible parts such as INA240A1PWR (100 V/V gain) or INA240A3PWR (200 V/V gain) if gain adjustments are permissible. Verify pinout compatibility with existing board layouts. Ensure replacement components support the same 80 V common-mode voltage range and operate within the specified temperature limits.