INA241B3IDGKR

Overview

The INA241B3IDGKR is a bidirectional current sense amplifier from the Texas Instruments INA241B series, housed in an 8-pin VSSOP package. It features a fixed gain of 50V/V and supports a common-mode voltage range from -5V to 110V. 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 gain error of ±0.1%, a maximum input offset voltage of ±150µV, and a DC common-mode rejection ratio of 120dB. It provides a small-signal bandwidth of 1.1MHz and a slew rate of 8V/µs.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output disturbances caused by high-speed common-mode voltage transients associated with switching systems.
• Bidirectional operation enables accurate measurement of voltage drops across shunt resistors over a wide common-mode range independent of the supply voltage.
• High precision architecture ensures low offset voltage and minimal gain drift across the full operating temperature range.

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 variant when sourcing. Confirm that the B-series accuracy specifications meet the system requirements for gain error and offset voltage. 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 50V/V gain is required for bidirectional current sensing applications. The device is suitable for systems experiencing large common-mode voltage transients due to its enhanced PWM rejection capabilities. Consider the VSSOP-8 package constraints regarding thermal dissipation and board space availability during integration.

Part Context

This part belongs to the INA241x family of ultra-precise current sense amplifiers designed for high-voltage, bidirectional measurements. The B-series variants offer standard precision compared to the A-series, providing a balance of performance and cost for industrial and automotive applications requiring reliable current monitoring.

Replacement Considerations

INA241A3IDGKR offers higher precision with lower offset and gain error specifications while maintaining the same gain and package.