INA241A4IDGKR

Overview

The INA241A4IDGKR is a bidirectional current sense amplifier with a fixed gain of 100 V/V. It operates over a common-mode voltage range of -5V to 110V and supports a supply voltage from 2.7V to 20V. Key electrical specifications include a maximum offset voltage of ±10µV, a typical DC CMRR of 166dB, and a small signal bandwidth of 1.1MHz at all gains. The device draws 2.5mA of quiescent current and features enhanced PWM rejection for switching systems.

Feature Summary

• Enhanced PWM rejection circuitry minimizes output disturbances caused by large common-mode voltage transients in switching applications.
• Ultra-precise measurement capability achieved through low input offset voltage and high DC common-mode rejection ratio.
• Constant input bias current across the entire common-mode voltage range ensures precision without leakage variations.

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 when sourcing. Confirm that the A version meets the required accuracy standards compared to the B version. Ensure the operating environment stays within the specified temperature range of -40°C to +125°C for guaranteed performance.

Selection Notes

Select this component when high-side or low-side sensing requires a wide common-mode range exceeding the supply voltage. The fixed 100 V/V gain suits applications needing significant signal amplification from small shunt voltages. Consider the 1.1MHz bandwidth for fast transient detection requirements.

Part Context

This part belongs to the INA241x family of ultra-precise current sense amplifiers. The 'A' designation indicates higher accuracy specifications compared to the 'B' variant. The DGKR suffix identifies the VSSOP-8 surface-mount package option available for this series.

Replacement Considerations

INA241A4IDDFR (SOT-23-8 package)

FAQ

How does the INA241A4 handle common-mode transients?

It utilizes enhanced PWM rejection circuitry that holds the output for 1µs during large common-mode transitions, preventing disturbance propagation.

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

No, the input bias current remains constant at approximately 35µA regardless of the common-mode voltage level.