INA241B1IDGKR

Overview

The INA241B1IDGKR 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 10V/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, independent of the supply voltage. Key electrical specifications include a maximum gain error of ±0.1%, a typical DC common-mode rejection ratio (CMRR) of 166dB, 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.
• High precision is achieved through low offset voltage and minimal gain error, ensuring reliable performance in switching systems.

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 and tape-and-reel shipping configuration. Confirm that the B version accuracy meets system requirements for gain error and offset drift. Ensure the operating environment stays within the specified -40°C to +125°C temperature range. Check for moisture sensitivity levels if storage conditions exceed manufacturer guidelines.

Selection Notes

Select this component when high-side, inline, or low-side sensing is required with a fixed 10V/V gain. The wide common-mode range allows operation independent of the system supply voltage. Consider the enhanced PWM rejection for applications with significant switching noise. Verify that the 1.1MHz bandwidth and 8V/µs slew rate meet the transient response needs of the target application.

Part Context

This part belongs to the INA241x series of ultra-precise, bidirectional current sense amplifiers. The series offers multiple gain options ranging from 10V/V to 200V/V and various package types including SOT23-8, SOIC-8, and VSSOP-8. The INA241x family is designed for high-voltage measurements in systems subject to large common-mode voltage transients.

Replacement Considerations

Other variants within the INA241x family, such as INA241A1IDGKR or INA241B2IDGKR, share similar pinouts and functionality but differ in accuracy grades or gain values. Ensure any substitute matches the required gain and package type.