INA241A3IDGKR

Overview

The INA241A3IDGKR is a bidirectional current sense amplifier from Texas Instruments, housed in an 8-pin VSSOP package. It features a fixed gain of 50 V/V and operates with a supply voltage between 2.7V and 20V. The device supports a common-mode input range from -5V to 110V. Key electrical specifications include a maximum offset voltage of ±10µV, a typical DC CMRR of 166dB, and a quiescent current of 2.5mA. It provides a small-signal bandwidth of 1.1MHz and a slew rate of 8V/µs.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients at the inputs.
• Ultra-precise measurement capability achieved through low offset voltage and minimal gain error across the operating temperature range.
• High-speed response with wide bandwidth ensures rapid detection and processing of over-current events.

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 A3 designation matches the required 50 V/V gain for your system design. Ensure compatibility with the specified -40°C to +125°C operating temperature range.

Selection Notes

Select this component when high precision is required alongside robust performance in noisy switching environments. The fixed 50 V/V gain suits applications needing moderate amplification without external resistors. Consider the bidirectional operation and wide common-mode range for high-side or inline sensing topologies.

Part Context

This part belongs to the INA241x family of ultra-precise, bidirectional current sense amplifiers. The 'A' variant denotes the highest accuracy tier within the series, featuring superior offset and gain error specifications compared to the 'B' version. The DGK suffix identifies the specific surface-mount packaging option.

Replacement Considerations

INA241A3IDGKT (Cut Tape variant)

FAQ

How does the device handle common-mode voltage transients?

The INA241A3IDGKR utilizes enhanced PWM rejection circuitry to attenuate large common-mode delta-V/delta-t transients, holding the output stable for 1µs to prevent erroneous measurements.

Is the input bias current dependent on the common-mode voltage?

No, the input bias current remains constant at approximately 35µA across the entire common-mode voltage range from -5V to 110V.