INA241B4IDGKR

Overview

The INA241B4IDGKR is a bidirectional current sense amplifier from the Texas Instruments INA241x family, housed in an 8-pin VSSOP package. It features a fixed gain of 100 V/V and operates with a supply voltage range of 2.7V to 20V. The device supports a wide common-mode input voltage range from -5V to 110V. Key electrical specifications include a maximum gain error of ±0.1%, a typical DC common-mode rejection ratio (CMRR) of 130dB, and a small-signal bandwidth of 1.1MHz across all gains. It draws a typical quiescent current of 2.5mA and functions within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbances caused by large common-mode voltage transients at the inputs.
• Bidirectional operation enables accurate measurement of voltage drops across shunt resistors over a wide common-mode range independent of supply voltage.
• High small-signal bandwidth of 1.1MHz ensures fast response for rapid detection and processing of over-current events.

Applications

• Motor drives
• Solenoids and actuators
• Cordless power tools

Procurement Notes

Verify the specific suffix IDGKR corresponds to the VSSOP-8 package variant when sourcing. Confirm that the B-series accuracy specifications meet the system requirements, as they differ from the A-series precision grades. Ensure the operating environment remains within the specified -40°C to +125°C temperature range for guaranteed performance.

Selection Notes

Select this component when a fixed 100 V/V gain is required for high-side or low-side current sensing applications involving switching systems. The B-series offers a balance of precision and cost compared to the A-series. Consider the 1.1MHz bandwidth and enhanced PWM rejection if the application involves high-frequency switching noise on the common-mode line.

Part Context

This part belongs to the INA241x series of ultra-precise, bidirectional current sense amplifiers designed for high-voltage measurements. The series includes multiple gain options ranging from 10V/V to 200V/V and various package types including SOT-23-8, VSSOP-8, and SOIC-8. The INA241B4 specifically denotes the 100V/V gain version within the B-grade accuracy subset.

Replacement Considerations

INA241A4 variants offer higher precision but may have different pricing. Other INA241x models provide different gain factors (10V/V, 20V/V, 50V/V, 200V/V) or package styles (SOT-23-8, SOIC-8). Verify pin compatibility and thermal characteristics when substituting packages.