INA241A5IDGKR

Overview

The INA241A5IDGKR is a bidirectional ultra-precise current sense amplifier from Texas Instruments, housed in an 8-pin VSSOP package. It features a fixed gain of 200 V/V and supports a wide common-mode voltage range from -5V to 110V, independent of the supply voltage. The device operates on a single supply between 2.7V and 20V with a typical quiescent current of 2.5mA. Key electrical specifications include a maximum offset voltage of ±8µV, a DC CMRR of 166dB, and a small-signal bandwidth of 1.1MHz at all gains.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbances caused by large common-mode voltage transients associated with switching systems.
• Zero-drift input architecture ensures low offset voltage and drift for accurate measurement of low VSENSE levels across the operating temperature range.
• Constant input bias current remains stable over the entire common-mode voltage range, enabling precision sensing without leakage errors.

Applications

• Motor drives
• Solenoids and actuators
• Injection molding machines
• Cordless power tools

Procurement Notes

Verify the specific suffix IDGKR corresponds to the VSSOP-8 package when sourcing. Confirm that the A5 designation matches the required 200 V/V gain for your application. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards. Cross-reference the manufacturer part number against official distributor catalogs to avoid counterfeit components.

Selection Notes

Select this component when high accuracy is required in high-side or low-side current sensing applications involving large common-mode voltages. The 200 V/V gain is suitable for detecting small voltage drops across low-value shunt resistors. Consider the 1.1MHz bandwidth for fast transient detection and the enhanced PWM rejection for noisy switching environments like motor controls.

Part Context

This device belongs to the INA241x family of ultra-precise current sense amplifiers. The family offers multiple gain options (10V/V to 200V/V) and package variants including SOT-23-8, SOIC-8, and VSSOP-8. The INA241A series represents the highest precision tier within the lineup, characterized by minimal gain error and offset voltage drift compared to other versions.

Replacement Considerations

INA241B5IDGKR: Lower precision variant with higher offset and gain error. INA241A5DDFRQ1: Automotive qualified version in SOT-23-8 package. INA296A5IDGKR: Similar performance but with different noise characteristics and bandwidth.