INA240A4PWR

Overview

The INA240A4PWR is a high/low side, bi-directional zero-drift current sense amplifier from Texas Instruments. It features enhanced PWM rejection and operates within a wide common-mode voltage range of -4 V to 80 V. The device provides a fixed gain of 200 V/V with a maximum gain error of 0.05%. Key electrical parameters include an input offset voltage of 5 µV, input bias current of 90 µA, and a 3dB bandwidth of 400 kHz. It functions on a single supply voltage between 2.7 V and 5.5 V, consuming a maximum operating supply current of 2.4 mA. The component is housed in an 8-TSSOP package and supports operation temperatures from -40°C to +125°C.

Feature Summary

• Enhanced PWM rejection capability for accurate current measurement in systems with large common-mode transients
• Zero-drift architecture ensuring low offset voltage and drift for high precision applications
• Wide common-mode voltage range supporting both high-side and low-side sensing configurations

Applications

• Motor drive current monitoring
• Solenoid control system diagnostics
• Industrial process automation power management

Procurement Notes

Verify the specific suffix PWR indicates the TSSOP-8 tape and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected grade matches the required accuracy specifications for the target application environment.

Selection Notes

Select this variant when a fixed gain of 200 V/V is required for small signal amplification. The wide common-mode range allows flexibility in circuit topology relative to ground potential. Consider the thermal performance of the TSSOP package against the expected power dissipation in the final assembly design.

Part Context

This component belongs to the INA240 family of current sense amplifiers designed for high-precision measurements. The A4 designation specifically denotes the 200 V/V gain version. The series is engineered to handle harsh electrical environments typical in automotive and industrial sectors, offering robustness against electromagnetic interference and switching noise.

Replacement Considerations

INA240A4PW: Identical functional specifications but utilizes an SOIC-8 package instead of TSSOP-8. Verify pinout compatibility and thermal characteristics before substitution.