INA290A3IDCKR

Overview

The INA290A3IDCKR is a single-channel, high-side current-sense amplifier from the INAx290 family. It features a wide common-mode voltage range of 2.7 V to 120 V and operates on a supply voltage between 2.7 V and 20 V. The device provides a fixed gain of 100 V/V with a maximum gain error of ±0.1% and a typical DC CMRR of 160 dB. Key electrical parameters include an input offset voltage of ±15 µV (maximum), quiescent current of 370 µA, bandwidth of 900 kHz, and slew rate of 2 V/µs. It is housed in a space-efficient SC-70 package.

Feature Summary

• Ultra-precise zero-drift architecture enables accurate measurement of low sense voltages across extended temperature ranges.
• High common-mode rejection ratio ensures signal integrity over wide common-mode voltage variations.
• Wide bandwidth supports fast response for rapid detection and processing of overcurrent events.

Applications

• Active antenna system mMIMO
• Macro remote radio unit power supplies
• 48-V rack server power distribution
• Test and measurement equipment

Procurement Notes

Verify the specific suffix 'A3' confirms the 100 V/V gain setting required for your circuit design. Confirm the 'DCKR' designation matches the SC-70 package and reel packaging format needed for your assembly process. Ensure compatibility with standard surface-mount placement equipment specifications.

Selection Notes

Select this component when high accuracy is required for high-side sensing in systems with large common-mode voltages up to 120 V. The 100 V/V gain option optimizes dynamic range for moderate sense voltages. Consider the 370 µA quiescent current for power-sensitive designs requiring minimal standby drain.

Part Context

This part belongs to the INAx290 series of ultra-precise current-sense amplifiers. The series includes dual-channel (INA2290) and quad-channel (INA4290) variants. The single-channel INA290 is specifically packaged in the compact SC-70 form factor, making it suitable for applications where board space is limited compared to larger packages like VSSOP or QFN.

Replacement Considerations

Other devices within the INAx290 family such as INA290A1, INA290A2, INA290A4, and INA290A5 offer different fixed gains (20, 50, 200, and 500 V/V respectively). These are pin-compatible alternatives if the gain requirement differs. Multichannel versions INA2290 and INA4290 require different packages.