INA241B5IDGKR

Overview

The INA241B5IDGKR is a bidirectional ultra-precise current sense amplifier from Texas Instruments, featuring a fixed gain of 200 V/V. It operates with a wide common-mode voltage range from -5V to 110V and supports a supply voltage between 2.7V and 20V. Key electrical characteristics include a maximum gain error of ±0.1%, an input offset voltage of ±150µV, and a typical DC CMRR of 130dB. The device offers a small signal bandwidth of 1.1MHz, a slew rate of 8V/µs, and a step response settling time of 1µs to 1%. It draws a 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 disturbances caused by large common-mode voltage transients in switching systems.
• Bidirectional operation enables accurate measurement of voltage drops across shunt resistors over a wide common-mode range independent of the supply voltage.
• Ultra-precision architecture provides low offset voltage and low drift for high accuracy current sensing applications.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'DGKR' corresponds to the VSSOP-8 package and tape-and-reel packaging configuration. Confirm that the B5 variant matches the required 200V/V gain specification for your design. Ensure compatibility with the -5V to 110V common-mode input range and 2.7V to 20V supply requirements. Check for any recent product change notifications or end-of-life notices associated with this part number before finalizing procurement.

Selection Notes

Select the INA241B5IDGKR when a fixed gain of 200V/V is required for high-side, inline, or low-side current sensing. This component is suitable for applications involving switching systems with significant common-mode voltage transients up to 125kHz. Consider the ±0.1% gain error and ±150µV offset voltage specifications against your system's precision needs. The VSSOP-8 package is appropriate for space-constrained surface-mount designs requiring thermal performance within the specified operating temperature range.

Part Context

This component belongs to the INA241x family of ultra-precise, bidirectional current sense amplifiers. The family includes variants with different gains (A1-B1 through A5-B5) and packages. The INA241B series specifically denotes the version with ±0.1% maximum gain error and ±150µV maximum offset voltage, distinguishing it from the higher precision INA241A series. The DGKR suffix indicates the VSSOP-8 package option.

Replacement Considerations

INA241B5IDR (SOIC-8 package)

FAQ

How does the enhanced PWM rejection feature function?

The device holds the output for 1µs during large common-mode transients to prevent disturbance propagation. If another transient occurs within the following 3µs, the high bandwidth and AC CMRR attenuate the effect.

What is the relationship between the common-mode voltage and the supply voltage?

The common-mode voltage range (-5V to 110V) is independent of the supply voltage (2.7V to 20V), allowing use in applications where the common-mode voltage exceeds the supply rail.