INA240A3PWR

Overview

The INA240A3PWR is a unidirectional current sense amplifier manufactured by Texas Instruments, housed in an 8-pin TSSOP package. It features a fixed gain of 100 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 supply current of 2.4 mA. Key electrical specifications include a 5 µV input offset voltage, 132 dB DC common-mode rejection ratio, and a 400 kHz -3dB bandwidth. 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
• Bidirectional operation with negative common-mode voltage support below ground
• Ultra-precise zero-drift architecture ensuring high accuracy over temperature

Applications

• Motor drive systems requiring precise current monitoring
• Solenoid control circuits with flyback voltage handling
• Industrial process automation equipment
• Power supply output current sensing

Procurement Notes

Verify the specific suffix PWR indicates the TSSOP-8 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to procurement. Ensure the ordering part number matches the required gain configuration and packaging type to avoid integration errors during assembly.

Selection Notes

Select this component for applications demanding high precision in high-voltage common-mode environments. The 100 V/V gain suits scenarios where small shunt voltages require significant amplification. Consider the TSSOP-8 footprint for space-constrained designs. Evaluate thermal performance within the specified operating temperature range to ensure long-term stability in industrial settings.

Part Context

This device belongs to the INA240 family of current sense amplifiers designed for high-side and low-side sensing. The A3 suffix denotes the specific 100 V/V gain version within the series. The PWR suffix identifies the plastic small-outline package variant. This family emphasizes robustness against electromagnetic interference and transient voltages common in power electronics.

Replacement Considerations

INA240A3DR: Same functional specifications but packaged in an SOIC-8 format instead of TSSOP-8.