INA240A4DR

Overview

The INA240A4DR is a high/low side, bi-directional zero-drift current sense amplifier from Texas Instruments. It features enhanced PWM rejection and operates within a common-mode voltage range of -4 V to 80 V. The device provides a fixed gain of 200 V/V with an accuracy of 0.02% and a gain error of 0.05%. Key electrical parameters include a maximum input offset voltage of 5 µV, input bias current of 90 µA, and supply current of 1.8 mA. It supports a supply voltage span from 2.7 V to 5.5 V, offers a 3dB bandwidth of 400 kHz, and achieves a CMRR of 132 dB. Operating temperature ranges from -40°C to +125°C in an 8-SOIC package.

Feature Summary

• Enhanced PWM rejection circuitry designed to suppress large dv/dt common-mode signals
• Bi-directional operation capability for measuring current flow in both directions
• Zero-drift architecture ensuring high precision with minimal offset voltage drift

Applications

• High-side and low-side current sensing in motor control systems
• Power supply monitoring and management circuits
• Industrial process control and automation equipment

Procurement Notes

Verify the specific suffix DR indicates the SOIC-8 tape and reel packaging configuration. Confirm RoHS compliance status and lead times directly with authorized distributors or Texas Instruments. Ensure the ordering part number matches the required gain code A4 for 200 V/V gain. Check for any recent product change notices regarding marking or packaging updates.

Selection Notes

Select this component when high accuracy and robustness against PWM noise are required in automotive or industrial environments. The wide common-mode voltage range allows flexibility in system design without level shifting. Consider the 8-SOIC package constraints for PCB layout. Compare against other INA240 variants if different gain codes or package types like TSSOP are needed for space limitations.

Part Context

This device belongs to the INA240 family of current-sense amplifiers from Texas Instruments. The family is characterized by zero-drift technology and enhanced PWM rejection capabilities. The INA240 series supports both high-side and low-side configurations, making it versatile for various power monitoring applications across automotive and industrial sectors.

Replacement Considerations

INA240A4PW: Same electrical specifications but in TSSOP-8 package instead of SOIC-8.

FAQ

What is the fixed voltage gain of the INA240A4DR?

The INA240A4DR has a fixed non-inverting voltage gain of 200 V/V.

Does the INA240A4DR support bidirectional current measurement?

Yes, the device is designed for bi-directional current sensing, allowing measurement of current flow in both directions.