INA241A2IDGKR

Overview

The INA241A2IDGKR is a bidirectional ultra-precise current sense amplifier from Texas Instruments. It features a fixed gain of 20 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, independent of the supply voltage. Key electrical specifications include a maximum gain error of ±0.01%, an input offset voltage of ±3µV (maximum), and a typical DC CMRR of 166dB. It offers a small-signal bandwidth of 1.1MHz and draws 2.5mA of quiescent current. The component is housed in an 8-pin VSSOP package.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients at the inputs.
• Ultra-precise architecture ensures high accuracy through low offset voltage and minimal gain error across the operating temperature range.
• Bidirectional operation allows for accurate measurement of current flow in both directions over a wide common-mode voltage range.

Applications

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

Procurement Notes

Verify the specific ordering suffix IDGKR corresponds to the VSSOP-8 package variant required for your design. Confirm that the A2 designation matches the necessary 20 V/V gain setting for your application's dynamic range requirements. Ensure compatibility with the specified -40°C to +125°C operating temperature range.

Selection Notes

Select this component when high precision is required in switching systems with significant common-mode voltage transients. The 20 V/V gain is suitable for applications requiring moderate amplification of shunt resistor voltage drops. Consider the 1.1MHz bandwidth for fast over-current detection needs.

Part Context

This part belongs to the INA241x family of ultra-precise, bidirectional current sense amplifiers designed for high-voltage measurements. The 'A' version denotes the ultra-precise grade with tighter tolerance specifications compared to the standard B version. The 'DGK' suffix indicates the 8-pin VSSOP surface-mount package option.

Replacement Considerations

INA241B2IDGKR

FAQ

How does the INA241A2IDGKR handle common-mode voltage transients?

It utilizes enhanced PWM rejection circuitry that holds the output for 1µs during large common-mode transients, preventing disturbances from propagating to the output signal.

What is the maximum gain error specification for this device?

The maximum gain error is ±0.01% at room temperature, with a maximum drift of ±1 ppm/°C over the full temperature range.