INA290A4IDCKR

Overview

The INA290A4IDCKR 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 200 V/V with a typical DC CMRR of 160 dB and an AC CMRR of 85 dB at 50 kHz. Key electrical specifications include a maximum offset voltage of ±12 µV, a gain error of ±0.1%, and a quiescent current of 370 µA per channel. It offers a bandwidth of 850 kHz and a slew rate of 2 V/µs.

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 in noisy environments with large common-mode voltage swings.
• Wide bandwidth and fast slew rate support rapid detection and processing of overcurrent events.

Applications

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

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-5 package and tape-and-reel shipping configuration. Confirm that the A4 designation matches the required 200 V/V gain for your circuit design. Ensure compatibility with the 2.7 V to 20 V supply voltage requirements and check for any regional compliance certifications such as RoHS status before finalizing procurement orders.

Selection Notes

Select this component when high-side sensing is required with a common-mode voltage up to 120 V. The 200 V/V gain is suitable for applications requiring significant signal amplification from small shunt resistors. Consider the 370 µA quiescent current for power-sensitive designs. Verify that the SC-70-5 package dimensions fit the available PCB space constraints compared to larger packages like VSSOP or QFN.

Part Context

This device belongs to the INAx290 series, which includes dual-channel (INA2290) and quad-channel (INA4290) variants. All members share the same ultra-precise, high-bandwidth architecture but differ in channel count and package type. The single-channel INA290 is optimized for space-constrained applications using the compact SC-70 package.

Replacement Considerations

Direct functional replacements within the same family include INA290A1IDCKR, INA290A2IDCKR, INA290A3IDCKR, and INA290A5IDCKR, which offer different fixed gains (20, 50, 100, and 500 V/V respectively). Automotive-grade alternatives are available in the INA290-Q1 series if AEC-Q100 qualification is required.